AU2010200080A1 - Automated Price Improvement Protocol Processor - Google Patents

Description

Australian Patents Act 1990 - Regulation 3.2A Original Complete Specification, Standard Patent Invention Title: Automated price improvement protocol processor The following statement is a full description of this invention, including the best method of performing it known to the applicant: Cross-reference to Related Cases This application is a further application for an invention disclosed in Australian patent application no. 2005325094 which is a divisional application of Australian patent 5 application no. 2004222811 which in turn is a divisional application of Australian patent application no. 14690/00, now patent no. 779178. The disclosures of those applications and patents are incorporated herein by reference. Reference is also made to U.S. Patent Application No. 08/766,733, now U.S. Patent No. 5,905,974, the disclosure of which is incorporated herein by reference. 10 Field of the Invention The present invention relates to data processing systems for assisting in financial transactions. More particularly, the present invention relates to a data processing apparatus and method for the managed trading of select classes of assets including securities, 15 financial instruments, commodities, and their derivatives in accordance with specific protocols in an auction format with controlled sequences of auction events. The inventive system is presented in the context of selected fixed income financial instruments auction for fairly and quickly transacting bid-offer trading, while providing for distribution of trading incentives. 20 Background of the Invention Economic activity has at its centerpiece the buyer-seller transaction for all goods and services produced and consumed in the market economy. It is the fundamental mechanism that allocates resources to producers and output to consumers. The operation of 25 the buyer-seller mechanism can and often is a critical determinant of economic efficiency and when operated properly, will substantially enhance market performance. Through history, there have been many different approaches adopted to bringing buyers and sellers together, each with the key objective of permitting transactions at or as -2 close as possible to the "market" price of the goods satisfying the desires of both buyers and sellers. By definition, the market price is the price (in given currency terms) that a fully educated market, given full access will transact select goods. Discovery of the market price can only be accomplished by permitting full access to the transaction by essentially 5 all potential buyers and sellers and allowing expression of each party's desires. However, the buyer-seller transaction must be structured to operate at very low costs -- or it will distort the market price of goods with artificially high transaction costs. Thus, the two keys to effective buyer/seller transactions - full access of expression and knowledge coupled with low transaction costs -- can be and are often conflicting, necessitating trade-offs 10 between trading efficiency and market knowledge. One well-known and particularly successful buyer-seller transaction system is known as the "open outcry auction". This involves a process wherein buyers and sellers collect in one location and brokers present prices for select goods to the group, via simple vocal offerings. This approach has been used for almost all kinds of goods, but is 15 particularly useful where there are no established trading locations or markets for the selected items. It is the dominant trading forum for exotic items such as rare pieces of art and the like. Although successful in bringing interested parties to the transaction, the overall process can be very expensive, adding significantly to the market-distorting transaction costs. 20 Open outcry auction techniques, modified over time, have also found successful application in many trading activities, including the buying and selling of farm produce and livestock, commodities contracts, futures contracts on a variety of items and particularly germane to the preferred embodiment of the present invention -fixed income securities. Many of these trading activities focus on the buying and selling of essentially 25 fungible items, that is, items that are without meaningful differentiation from like items on the market. For example, a bushel of wheat for February delivery is considered for sale and delivery at a price independent of its source. Similarly, a 30-year U.S. Treasury bond paying a coupon rate of 6.75% and having an August 1996 issue date is indistinguishable from one owned by another investor. Accordingly, the price at which buyers are willing to 30 pay and sellers are willing to accept defines the market price of all 30-year U.S. Treasury bonds of that same vintage, allowing open outcry auction trading that is transparent as to its sources. The fixed income securities issued by the United States government are known as U.S. Treasuries. These instruments typically span maturities of 13 to 52 weeks (T-bills), -3 one to ten years (notes), and up to 30 years (Bonds). T-Bills are pure discount securities having no coupons. Almost all other Treasuries having longer terms are coupon notes or bonds, with a defined interest payment cycle of semi-annual payments to the holder. An additional and more recent type of Treasury security provides for inflation indexed 5 payments. Although treasuries are used exclusively in the following discussions, the principles of the present invention may be applied to other types of assets, including securities, financial instruments, commodities, and their derivatives without departing from the inventive concepts. 10 New Treasury securities are auctioned by the U.S. government at preestablished auction dates. The auction prices for newly issued Treasuries having a face value with a set coupon rate defines the Treasuries' yields when issued. After the auction, the Treasuries enter the secondary market and are traded typically "over the counter," i.e., without a defined exchange. As inflation expectations and supply and demand conditions change, the 15 prices of recently auctioned Treasuries fluctuate on the secondary market. The new prices are reflected by competing bid and offer prices communicated among institutions, banks, brokers, and dealers in the secondary market. The newly auctioned securities are traded with and in conjunction with the securities issued in earlier auctions. In this context, some securities are traded more often 20 than others and are called the "actives"; the actives usually correspond to the recently issued securities as opposed to the older securities in the market. Indeed, some older securities are infrequently traded, resulting in an illiquid market that may or may not reflect the market-determined interest rate for the more current securities at the same maturity length. 25 Accordingly, the very size and diversity of the Treasury market requires a high level of sophistication by market participants in the bidding, offering, buying, and selling transactions involving these securities. The very complexity associated with the transaction and the scale of trading undertaken by banks, brokers, dealers, and institutional participants necessitates a rigidly structured approach to trading. 30 In the past, open outcry auction bond brokering has served its customers well, providing efficient executions at nearly accurate market pricing. The open outcry auction applied to bond trading was implemented by a broker working with a collection of customers to create and manage a market. Typically, customer representatives -for both buyers and sellers -- would congregate at a common location (e.g., a single room) and -4 communicate with each other to develop pricing and confirm transactions. This process involved representatives expressing various bid and offer prices for the fixed income security at select volumes (i.e., how many million dollars of bonds at a given maturity).This expression took the form of the loud oral "cry" of a customer-proposed bid 5 or offer and the coordination with the fellow representatives regarding the extraction of complimentary positions -- until a transaction match was made and a deal done. This "trade capture" process relies on after-the-fact reporting of what just transpired through the oral outcry trade. Recently, the trade capture process was performed by designated clerks inputting 10 data into electronic input devices. An input clerk would attempt to interpret the open outcry of many individual brokers simultaneously, making verbally known the trading instructions of their customers. The quality of the data capture was a function of the interpretive skill of the input clerk, and the volume and the volatility of customer orders. A significant drawback to this type of auction data capture process is the difficulty in 15 discerning the distinct trading instructions verbalized in rapid succession during a quickly moving market, so that an accurate sequence of data can be captured. The many permutations of this process will be discussed in detail below. At this juncture, suffice to say that, at lower volumes of transactions existing at the time of its development, and the lack of suitable alternatives, the open outcry auction process 20 remained the dominant trading mechanism for decades. However successful, this approach was not perfect. Indeed, in recent years, some of the problems in an open outcry auction forum have been amplified by the vastly increased level of trading now undertaken in the fixed income field. Generally, difficulties would occur by the injection of trader personalities into the open outcry auction process. For example, a loud, highly vocal 25 representative may in fact dominate trading-and transaction flow -- even though the representative may only represent a smaller and less critical collection of customers. Although such aggressive actions at open outcry auction may be beneficial to those particular customers in the short run, overall, such dominance of the trading can and will distort pricing away from the actual market and leave some buyers and sellers unsatisfied. 30 Other problems exist in open outcry auctions that retard efficient trading. The speed at which trading flows and the oral nature of the auction process insert a potential for human error that often translates into many millions of dollars committed to trades unrelated to customer objectives. On some occasions, the broker is left at the end of each trading day with a reconciliation process that may, under certain market conditions, wipe -5 out all associated profit from that day's trading. Also, customers may quickly change direction regarding the trading, based on new information available to the market. Shifting position or backing out of a previously committed transaction on very short notice is often very difficult in the traditional open outcry process. 5 There have been many past efforts to incorporate computers into trading support for select assets and financial instruments, including automating the auction process through systems that control auction protocols. Indeed, almost all trading today involves some computer support, from simple information delivery to sophisticated trading systems that automate transactions at select criteria. However, these systems have not significantly 10 impacted the issues presented relating to satisfying the complex desires of buyers and sellers in completing a transaction as they relate to open outcry auction and traditional trading in the fixed income field. It was with this understanding of the problems with certain trading processes involving the buyer and the seller that formed the impetus for the present invention. 15 Objects and Summary of the Invention It is an aim of the invention to provide a method and/or system of electronic interactive buying and selling of items which overcome or ameliorate one or more of the disadvantages or problems described above. 20 The present invention provides a method of electronic interactive buying and selling of items as claimed in the claims of this specification. There is also disclosed herein a computer-based, data processing system having program controlled logic for managing select trading. The data processing system employs a plurality of trading workstations linked with a server for coordinated data flow and 25 processing. Communication is provided by a network, such as, for example, an Ethernet, token ring, token bus, or other hierarchical LAN and/or WAN configuration. The system preferably includes a dedicated keypad for input at each workstation that provides individually programmed keystroke commands; alternatively, other keyboards, keypads or voice controlled electronic devices can be used with the present system. Central processing 30 logic dictates the available order, trading and allocation options, and screen displays for each workstation. As orders and transactions are entered, various protocols affect the allocation of bid-offer control, priority generation, exclusive trading time, and interactive trade management. As trades are completed, the system updates a linked database with newly entered transactional data.

-6 The controlling logic provides a sequence of trading states for each participant. The five states are: 1. Bid-Offer State 2. When State 5 3. Workup State 4. Second Look State 5. Workdown State As various transactions are entered, workstations operate in one of these five states. The workstation "state" determines the options available to the participant -- and thus 10 controls the flow of orders and trades in a cost-efficient and error-free manner. While participants may bid, offer and trade on differently configured workstations, the protocols are universal for all participants, thereby precluding aggressive control of transactions without true capital commitment. In order that the invention may be more readily understood and put into practice, 15 one or more preferred embodiments thereof will now be described, by way of example only, with reference to the accompanying drawings. Brief Description of the Figures Figure 1 is a system block diagram depicting the salient hardware components of 20 an embodiment of the present invention; Figure 2 provides a flow diagram depicting the transmission of trading related information; Figures 3A-B depict the salient features of the dedicated keypad; Figure 4 is a block diagram of the various system states and pathways 25 therebetween; Figure 5 is a logic diagram for trading data input; Figure 6 is a logic diagram for Bid-Offer State; Figure 7 is a logic diagram for the When State; Figure 8 is a logic diagram for the Workup State; 30 Figure 9 is a logic diagram for the Second Look State; Figure 10 is a logic diagram for the Workdown State; Figure 11 is a trading logic summary table; and Figure 12 is a drawing of an interactive keyboard useful for practicing the invention.

-7 Detailed Description of the Embodiment(s) of the Invention A data processing system is provided for implementing complex trading rules in support of select transactions. A first aspect of the system relates to a particular hardware 5 arrangement that provides a specifically tailored platform for processor enhanced and supported trading. This hardware arrangement encompasses a plurality of custom designed workstations linked together for communication. Each workstation communicates to a central server that orchestrates the trading process in accordance with program controlled logic. The workstation includes a display for presenting the particulars of trading activity. 10 Preferably a customized keypad permits enhanced data/trade entry by a participant or a participant selected input interface. A second aspect of the system is the governing logic for controlling system dynamics. This logic is stored in system memory and provides the sequence of protocols and rules that allocate trading priority. The logic also provides system responses to 15 operative commands entered by the participants, either directly or through brokers or terminal operators, at the workstations. The system logic is important in two ways. First, it is important as the guiding principles underlying the system and thus performance is tied directly thereto. Second, system logic must be known to all participants as the rules dictating market access and response -- to eliminate any confusion and to place participants 20 on as close to an equal footing as possible. The system preferably provides fair and complete access to the trading process to all registered participants. To better appreciate the following details, the nomenclature is defined below. The illustrative examples herein, but not limited to them, all focus on fixed income instruments and the trading of these instruments in large volumes -- with the volume of a given 25 transaction delineated in, but not limited to, dollars (e.g., $25 million of 10 year treasuries). The following terms are used with the associated definition: TABLE 2 Bid Dollar or yield amount bid to buy a security-issue 30 Offer Dollar or yield amount offered to sell a security- issue Spread Difference between best Bid(s) and best Offer(s) on market Issue A common class of fixed income securities, e. g., the most recently issued 10-year Treasuries. Participant A person or controlling entity receiving data on trading and 35 responding thereto. While the Participant is often a trader, terminal operator, or broker acting on behalf of a customer, this is not the only arrangement. For example, the customers -8 may interact as Participants directly. Other arrangements are also possible. Hit Accepting a pending Bid Take or Lift Accepting a pending Offer 5 Size The volume in dollars of a particular Bid-Offer Makers Participants with pending Bids and Offers-making a market Uncleared Entry Current Bids-Offers that afford the Maker priority Traders After a trade is initiated, all Participants involved in the transaction (as buyer and seller) 10 Exclusive Time A time period commenced by a trading action during which the first best bidder/offerer has the opportunity to trade more Price Improvement Hit An accepted sell order at and/or below the current best Bid to sell a security- issue initially for more volume than shown on the Passive Side 15 Price Improvement Take An accepted buy order at and/or above the current best Offer to buy a security- issue initially for more volume than shown on the Passive Side Trade A string of transactions at one or more prices initiated by a Hit or Take and continuing until timed out or done 20 Aggressor A Participant who initiates a trade Active Side Group of traders on the same side of market as the Aggressor Passive Side Group of traders on opposite side of the market from the Aggressor Trader Surplus Describes and quantifies the situation where an Aggressor has 25 traded the entire size shown on the Passive Side at one or more price levels and is showing intent to trade more or where a passive Participant is willing to buy or sell above or below the current trading price. These situations lead the way to a Price Improvement trade between Aggressor (s) and passive 30 Participants. The general context of system operation is based on the repetitive operation of several functions and, in its original embodiment, implements these functions through a specially designed keypad or other input means. Generally, the process begins when 35 Participants place Bids and Offers for a defined class of instruments. These various orders are exhibited on the display screen in specific ways to reflect priority, size, and kind. A Participant can establish trading priority by placing a Bid or Offer at a select price and volume; bids at the same price are displayed on the screen in time order in which they enter the system (as are Offers). As such a "queue" of Bids and Offers develops, with place 40 in line set by time at the same price. Alternatively, the queue can be set by a different -9.

metric ranking, e.g., a combination of time and size. This queue (or a summary thereof) is displayed on screen at the Participant's workstation. Typically, there is a small difference between the Bid price and the Offer price -- the "Spread". If no difference exists, this is known as a "locked" market. 5 Importantly, a Bid and Offer are commitments -once placed, a Bid can be "Hit" and an Offer can be "taken or lifted" by a Participant willing to trade the instrument at the set price or set of prices. To control trading between many Participants, a level of hierarchy is set. A Participant who Hits a Bid or Lifts an Offer is promoted to a new level known as the 10 "Aggressor". By acting on a Bid or Offer, the Aggressor defines (and thus establishes) the Active Side of the trade. For example, if the Participant hits a Bid, selling becomes the Active Side of the trade and buying turns passive. However, if the Participant takes an Offer, buying is active. This is an important practical consideration, as by some conventions the Active Side pays commissions on the ensuing transactions. When a Price 15 Improvement trade takes place, however, the commission on this trade can be divided among the Participants in the trade. This allocation of commissions is premised on the notion that the active Participants are taking advantage of liquidity -- while the Passive Side is supplying liquidity to the market, and on the notion that if a better price can be obtained during Price Improvement trading, a passive trader is provided with value for 20 which he/she is willing to pay. Further combinations of commission allocation are warranted to encourage trading, e.g., choices among volume discounts, annual fixed fees, both sides pay, and paying based on time and place of execution. For controlled implementation, the above-noted delineation between Active and Passive Sides is important and carries more significance in processing transactions than the 25 different sides of the transaction, i.e., the Bid and Offer. Focusing further on the nomenclature for the system logic, a "Trade" is considered a sequence of trading events, triggered by the initial Hit or Take that defines the Aggressor, and continues for all such transactions until the trade "clears". During a non-price improvement trade, the Aggressor side remains active and all transactions take place at the 30 price set by the initial Hit or Take -- regardless of the number of following transactions. To properly track activity, a trade generates a (virtual and/or real) single trade ticket -with associated and screen-displayed reference number. Where a transaction reflects more than a single buy/sell, several trade tickets each reflecting the total size transacted per -10 Participant, per side is recorded. A set of average price tickets or their equivalent may be generated. In addition, the system controls the Participant's maximum command size thereby preventing a Participant from committing order transmittals that are outside the 5 Participants' permissible trading parameters. This control logic also protects the novice Participant. Through this process, Participants with different skills can trade on a more level playing field. The processor can also control the hierarchy of Participants to allow management intervention. Figure 1 depicts the various hardware components found in an operative 10 embodiment of the present invention. In this context, a plurality of workstations 10 are provided, each individually linked to a central server 20 via network lines 15. Server 20 includes controlling software for managing the interaction of the dataflows to the individual workstations 10 in accordance with system constraints. Continuing with Figure 1, the system may be linked to Participants at remote 15 locations directly, indirectly, and/or through the Internet. Access to trading activity is accomplished at communication server 30 and remote server 40 to a remote distribution hub 50 and remote workstation 60. Supplemental communication lines are utilized via conventional phone link 90. The above platform further includes a 32-bit operating system to manage the multi-tasking environment within the network. The system has been 20 successfully implemented using an open VMS64-bit operating system running on DEC Alpha clustered servers; however, other operating systems may be substituted. Alternatively, the desktop client machines can be implemented in OS/2'; Windows N/T 4.0 is a migration substitute. The workstation provides display and input and can be selected from Pentium© processor based PCs, SPARC Station® (using UNIX), or other hardware 25 and software systems and/or languages providing the requisite functionality. Now turning to Figure 2, the overall information paths of the system are presented in block diagram form. This market information is derived from the auction process and is a highly valuable source of data to related markets, futures and options, or cash as the case may be. Beginning with block 100, market data is collected from the plurality of on-line 30 terminals operated by Participants within the relevant market sector. A continual exchange of information flows among the Participants, depicted in block 100, i.e., as Bids, Offers, and trades are transacted in real time. This information is collected by the system proprietor and entered into the data processor database.

-11 On-line market data is then transferred to the data filter and enhancer module, block 115, which acts to clarify and articulate the continuous incoming market data for use, e.g., by data accumulators, block 120. One aspect of the data enhancer operation will be the conversion of on-line trading information into digital form for transmission to the 5 classification processor, block 130. The operation of the classification processor is directed to creating a data set in proper format for further manipulation. This includes the generation of a coordination array of data in matrix format. Once properly formatted, the on-line market data is then transmitted to the qualification processor, block 140, for determination of a real time command selection. 10 The qualification processor also provides both Participants' validation and credit limit approval with Participant and security type linkages among Participant relationships and security identifiers. The information is then unloaded into the security database, block 150, and then passed to the distribution processor, block 160. The foregoing operation will result in the real time distribution among Participant 15 workstations for decision execution and for select distribution within the fixed income investment community, through communication lines and screen displays. In the context of this embodiment of the present invention, three segments of this community are provided with the data. At block 180 and block 170, system proprietors involved in automated options and futures processing are provided the cash market data for quantifying and 20 evaluating specific options and futures positions pursuant to the trading of option and futures contracts on specifically identified securities, including indices and notional securities derived therefrom. In a similar manner, the securities data is provided to system proprietors regarding options and futures contracts to permit proper transactions in the trading of options and futures contracts based on the identified securities data. 25 In the present context, the data relating to the auctioning of cash market securities is used to support trading in their derivative markets. Likewise, if the context were the auctioning of derivative securities, distribution flow would be to support trading in the underlying security. The third channel of distribution for the Securities is to the data accumulators and 30 vendors at block 190. This is followed by the continual distribution of the securities data to Participants within the investment and trading community, block 200, the support of automated trading, block 210, and finally, declaring and reporting functions associated with such trading, block 220, to include clearance operators among others.

-12 The trading activity is highly fluid and fast paced. Accordingly, efficient input systems are helpful to effectuate the multiple trading choices which may be enhanced by use of a highly specialized keypad that permits higher trading efficiency in the present context. Accordingly, a separate aspect of this embodiment of the present invention is the 5 unique keypad depicted in Figures 3A-B. During processing, various "states" are reached, depending on the type of inputs received by the system. The core state of Bid-Offer reflects the open status of the market. In this state, Participants are referred to as "Makers" and "contra-makers"; during other states, Participants are considered "Traders" and "contra-traders". Under this notation, 10 Traders and Makers are those Participants that issue a trading command, while contra makers and contra-traders are those who receive a trading command. Some Participants, e.g., first buyer and/or first seller, in the Workup State are known as "current workers" and are vested with the authority under system logic to control a trade for a predetermined duration of time. Depending on the fixed income security or instrument, this duration of 15 time may be zero. Important character distinctions among Participants at various stages of trade processing are displayed on screen by reverse highlight or similar display attributes. The interrelationship of these five system "states" is depicted in Figure 4. Initial trading is always predicated on the Bid-Offer State, 400, with the sequence process, 420, assessing system inputs for a change of current state. As inputs are entered, a state change 20 is triggered and processing shifts to paradigms associated with each of the five states. As each state is entered, the protocols are shifted and new rules to trading apply. Information about trading progress and Participants are provided at each workstation in the form of a selectively configured screen display. In particular, the system provides for screen display in the form of a trading quadrant or "quad" wherein key trading 25 indicators are displayed. A sample QUAD is depicted below: OUAD 1 100.01 2 100.03 15 Cust Bid Bot CUST offer Sold 2001 .1 0 2007 5 0 2002 1 0 2006 10 0 TOTAL 2 0 15 0 - 13 In the above QUAD, the current bid price is "100.01" (100 plus 1/32nd); continuing across on the same line, the current Offer price is set at "100.03" -indicating a Spread of .02 (2/32nds). When a trade is in progress -- as initiated by a Hit or Take from the Bid Offer State, the Participant's attention is mainly directed to the conditional prompt showing 5 the total size that is being bid or offered and that can be acted upon by the Participants. This number is displayed at the intersection of the TOTALs line and one of the Bid-Offer columns. This total is further defined in the quad into individual prequantities, indicating the Participant sizes in their respective rows. Other QUADS or arrangements can be under Participant or logic control to display trading state information. 10 Above the BOT and SOLD captions in QUAD 1, a second totals counter provides the Makers total size. In the Bid-Offer State, this total is the same as the conditional prompt because no trades have been executed. This changes after the first transaction when a "Traders list" is created -- and the conditional prompt tracks the traders total, while the Maker's total keeps track of quantity left in the Maker's list. 15 Turning now to Figure 5, the data selected for display on the Quad is processed in accordance with the depicted logic. The system enters a new Participant, CUST(ID), block 520, e.g., "2001 " and stores this in active memory with associated trade data/command TRD(ID), block 530. The trading command is confirmed at a systems level, i.e., rejecting system errors via Alarm, at 550. Once confirmed, the new data/command TRD(ID) is 20 distributed to the screen buffers for the associated work status for display, block 560. This is repeated for each new entry, block 570. The following discussion now focuses on the Bid-Offer State, wherein market Makers are inputting various Bids and Offers into the system while waiting for an execution as the market matures. The best first Bidders and Offerors receive trading 25 priorities during clearing and Exclusive Time. These pending commitments may be acted upon via Hit or Take commands by Makers currently showing or by a third party without showing its position prior to the Hit (or Take). As new Bids and Offers are made, the price attendant therewith determines the placement in the queue, with equally priced Offers (or Bids) placed in time order. Accordingly, as the market tightens with better Bids and Offers 30 (reducing the Spread), these new positions are moved to the top of the queue as displayed. In addition to price, Bids, and Offers, a size component is included, that is used to express the dollar volume of the pending Bid (or Offer). For a Participant to increase the size of the Bid or Offer, a new entry is made, and placed into the queue separately as the system will not increment the size component -- unless the entry was made adjacent in -14 time to an existing Bid-Offer already in the queue. Alternatively the sizes could be combined in this way: as Bids and Offers are entered during this state, they are displayed in relation to their respective size, with the total Bid-Offer count (aggregate size) displayed at the noted conditional prompt. As such, the conditional prompt serves as the main 5 impetus for a transaction due to its measure of apparent market capacity at a given price. A Bid-Offer is typically (but not always) entered as "uncleared" during the Bid Offer State -- indicating that the Bid or Offer is only available to the first best market Participant, i.e., on the top of the first queue. Accordingly, uncleared presentations are available for action by only this Participant for a system set time interval -- and only this 10 Participant can Hit or Take these uncleared entries. After the preset time interval has run (tracked by a system internal clock), the uncleared bids/offers -- if still extant -- become available beyond the best price Participant. In fact, for certain securities, the preset time interval may be zero. Most often, a known interval is established. There is a business purpose for this arrangement. By allowing Participants with active Bid-Offers the first 15 chance for the new entry, these Participants are rewarded for showing the market on their side. Thus, the initial bidders/offerors are invited to become Aggressors -- and the system preset interval provides these bidders/offerors time to make their decision by preventing new buyers and sellers from entering into the trade (i.e., hitting or taking) for this discrete interval. 20 The system in logic associated with the Bid-Offer State is depicted in logic in Figure 6. Logic conceptually begins at block 600, with the data/command entry block at 620. The State Selector qualifies the State as Bid-Offer, block 620. At block 630, the CUST X profile is taken from the new entry and all associated data passed into a parameter string, block 640, which is entered. 25 Continuing on this logic path, the system compares the new Price entry, PRC(I) entered into the system at Test 650, with pending Bids (or Offers -- if PRC(I) is associated with an Offer). Test 650 results with one of three choices: if the new entry PRC(I) is better than the current market, logic branches to block 655 and the previous top tier queue, Ql is demoted (moved) to Q2. The new entry then forms the first line in the new top queue, 30 QI_TOP at block 660. In this way, the system creates multiple queues at select price points for each side of the market. The multi-queue environment permits "Price Improvement" trading as will be detailed below. Continuing in Figure 6, if the new entry is out of the market, i.e., "worse" than the best current Bid-Offer, logic branches to block 685 and a new queue, Q(N) is created. In - 15 this instance, the new queue, having a price point worse than the market leaders, is displayed below the top queue. At block 690, the new entry is placed at the top of the new queue, Q(N)_TOP. As more entries are inputted, the system assesses each and places them in the 5 multiple queues in accordance with price; and within each queue in accordance with time priority. This results in several price defined queues for each side of the market and allows for Price Improvement trading if and when a new Aggressor takes/hits all showing volume for one and up to all shown contra-queues. In Figure 6, the final outcome from Test 650 is a qualified price, which leads to 10 block 680. This entry is placed at the bottom of QI because of time priority. At test 700, system checks for a new Hit/Take; if none, logic continues to the next entry, block 710. A positive response to Test 700 shifts processing to the next state, block 720. The screen display will change according to the various entries into the bidding 15 process. In QUAD 2 depicted below, Participants 3001-3003 on the bid side reflect a market of 27 million, see conditional prompt: "27" on the TOTALs line. This includes a first bid by Participant, CUST 3001 of 5.0 million, followed a little later by a second bid of 20 million. In this example, Participant, CUST 3007 (e.g., a bank or other institutional Participant) has entered the picture with an uncleared Offer of 10 million (asterisk 20 indicates the Offer is uncleared); this is the 10 million depicted on the conditional prompt line on the Offer side. As such, controlling logic gives the original Makers the first chance for the new Offer by 3007. After the interval, the market is again opened and the asterisk is removed. OUAD 2 > 7.625.225 TZ 108.04 27 *108.04 10 Cust Bid Bot CUST Offer SOLD 3001 5 0 *3007 10 0 3002 1 0 3003 1 0 3001 20 0 TOTAL 27 0 10 0 25 - 16 The When State is triggered by a trading command against an uncleared Bid-Offer by an Aggressor who is not the first best original Maker. However, system control will not allow this trading command by the new Aggressor to be instantaneously executed. In accordance with system logic, the trading processor creates a time interval or delay, and 5 thereby provides the first best original Maker time to assess the new situation created by the Aggressor by permitting response to the Uncleared Entry on the Passive Side. In particular, as noted above, the uncleared status exists for a defined interval controlled by computer driven timer. It is only during this time interval that a When State can be instituted, which can then only last until resolved by either the action of the first 10 best original Maker on the Active Side or by the expiration of the interval timer within system logic. During When State processing, the system displays the original Makers -- existing with Bid-Offers outstanding prior to the entry of the new Aggressor -- and the new traders) entering via Hit or Take commands on the pending uncleared Bid-Offer. These Makers and 15 Traders are clearly separated on the screen. (See QUAD 3B below). Importantly, these original Makers are given the opportunity to trade at the new price point established by the Aggressor; multiple Makers from the original list will each have access to take the new price in the order of their priority in the queue. The system will increment through each Maker, if one issues a buy/sell order at their size, they become the Aggressor. If this 20 occurs, the logic departs the When State and can either enter the Workup State or Workdown State depending on whether the new Aggressor takes the entire volume indicated at the conditional prompt. Once When State processing has been initiated, no trade entries from the Passive Side are permitted. Furthermore, Participants are blocked from entering on the Active Side. 25 Specifically, entries on the uncleared (active) side will come from the new traders, extant traders, or the original Makers. If, for example, a trader has 10 offered and 5 are traded, during the When State the trader preferably can cancel the amount which is not yet committed. However, if the second interval timer expires without any intercession by the 30 original Makers, the When entries (one or several) will automatically trade -- and the original Makers will not take part in this trade. During the time controlled interval, WTAK flashes on screen to the Makers showing a trade on the uncleared Offer. WHIT will flash for a Hit on an uncleared Bid. During this interval, the size entries for pending Makers are all initialized to zero, and no longer presented at the conditional prompt.

- 17 When State processing is depicted in Figure 7 and is triggered by a trading command CMD(I), block 810. Test 820 confirms that the new trading command (Hit or Lift) is from a new Aggressor; if not, logic continues to block 880 and to either Workup or Workdown State. 5 However, a positive response to Test 820 branches logic to block 830, wherein the market is blocked for a pre-set time interval. At block 840, all then current Active Side Makers are reset to zero. At test 850, the system determines if these Makers intercept the Aggressor before the time interval expires. If yes, the intercepting maker becomes the Aggressor, block 860, with full control over the succeeding trade sequence. If not, the new 10 Aggressor is set, block 870, and logic continues to the next State, block 880. The following sequence reflects the foregoing system logic. In QUAD 3A below, the Bid-Offer State has two Participants, CUST, 3002 and 3003 each showing bids at 10 million; Participant, CUST 3007 has just placed an uncleared Offer for I million. Participant, CUST 3001 wishes to take the new Offer by Participant, CUST 3007 -but he 15 can't automatically. In QUAD 3B below, Participant, CUST 3001 attempts to take the Offer by Participant, CUST 3007 forcing the system into the When State and creates an uncleared list for the Active Side (bid here). However, the prequantity of the first two bidders is reduced to zero -- as the system logic requires that these bids cannot be enforced at the new price point (108.04+).In this example, the second interval timer provides both 20 original Makers (3002 and 3003) priority over Participant, COST 3001; with Participant, CUST 3002 retaining overall priority via placement in the queue. OUAD 3A >7.625.225 TZ 108.04 20 *108.04+ 1 Cust Bid Bot CUST Offer SOLD 3002 10 0 3007 1 0 3003 10 0 TOTAL 20 0 1 0 25 - 18 QUAD3B > 7.625.225 TZ 108.04 20 108.04+ WTAK 1 Cust Bid Bot CUST Offer SOLD 3002 0 0 3007 1 0 3003 0 0 3001 1 0 TOTAL 1 0 1 0 Transactions forming a trade take place in accordance with this embodiment of the 5 present invention during one of two trading states, known as the Workup and Workdown States. The Workup State occurs pursuant to Hits or Lifts by an Aggressor taking the entire inventory of volume shown on the Passive Side; once established, the Workup State gives exclusive rights to the trade to the initial traders -- who the system recognizes as the current workers. On screen, current workers are highlighted in a defined manner known to 10 other Participants. Current workers control the trade and can submit additional transaction volume to their contra-traders; this is to the exclusion of outside Participants. Current workers on the Active Side of the trade will include the Aggressor, and possibly other traders, below the Aggressor with transactions that move the trade into the "Workup" State by filling residual volume that needs "Workdown". For the Passive Side, an Aggressor that 15 takes the entire size limits current worker status to himself and his counterparty. The status of current worker dissipates upon entry of "done" by the Participant, or the lapsing of the trading inactivity interval. Again, this interval is a preset system parameter triggered via system logic. Absent such termination, current workers can trade almost indefinitely, as long as they continue to respond to their contra-party's size 20 offerings. The Workup State logic is depicted in Figure 8 and is principally tied to size and new order data. The Aggressor size is entered as is the Passive Side prior to trade entry; block 910 and 920, respectively. At test 930, the system determines if the Aggressor has taken the entire market offering at time of trade; if "no" to test 930, logic continues to 25 block 990 and ultimately the Workdown State (Figure 9). A positive response to Test 930 passes logic to blocks 940 and 950, wherein the current workers are assigned and new trades are entered by the current workers to the exclusion of other Participants. Under these conditions, and if more than one price queue -19 exists on the Passive Side, the system provides for Price Improvement trading. In this context, the Aggressor has taken trades at multiple price points, indicating a willingness to trade at prices worse than the best Offers-Bids. The system measures the Spread between the best and worst price shown for each contra-trader. A mathematically determined value 5 is set bridging the two price points, e.g., the average of the two prices. This is accomplished at block 955, with the new price difference variable, Delta (ID), for that trader. Given this new price point (a "Price Improvement" from both party's viewpoint) new trades are entered, Test 960, and processed, block 970. This continues until the current workers are done or times out, Test 980. The system then tests for (block 965) and 10 executes (block 975) any new transactions entered (via Hit or Take commands) by new Participants. The above logic is better understood in the context of specific examples. A system without the Price Improvement feature is shown in QUAD 4A below, with a typical opening Bid-Offer displayed. 15 QUAD 4A > 7.625.225 TZ 108.04 16 108.05+ 45 Cust Bid BOT Cust Offer SOLD 3001 5 0 3007 25 0 3002 5 0 3006 10 0 3003 1 0 3005 10 0 3001 5 0 TOTAL 16 0 45 0 Assume that the Bid is Hit by Participant, CUST 3005 selling the entire size (16 20 million) to the Passive Side. This results in Participant, CUST 3005 as the Aggressor and the contra-trader (Participant, CUST 3001) as the current workers. It is now the Workup State as the Aggressor has taken all initial size-from the Passive Side. Those with priority, the Aggressor and first best bidder, are highlighted by video attribute indicated by a rectangular box. See QUAD 4B. 25 - 20 QUAD 4B > 7.625.225 TZ Refno 68119 108.04 Hit 16 108.05+ 36 Cust Buy BOT Cust Sell SOLD 3001 0 10 3005 0 16 3002 0 5 3003 0 1 TOTAL 0 16 0 16 Participant, COST 3002, wishing to continue, adds an additional 5 million size (adding to Participant, CUST 3002's original 5 million), which is displayed as 5 under Buy 5 and 5 under BOT. See QUAD 4C. A new Participant, CUST 3004, now enters a sell order (Hit) for 50 million. OUAD 4C > 7.625.225 TZ Refno 68119 108.04 Hit 16 108.05+ 36 Cust Buy BOT Cust Sell SOLD 3001 0 10 3005 0 16 3002 5 5 3004 50 0 3003 0 1 TOTAL 5 16 50 16 10 New Participant, COST 3004 must wait until the current workers are done (via keyboard entry or timer controlled system interval). After this, the system executes for Participant, CUST 3004 the sale of the additional 5 million to Participant, CUST 3002, while leaving 45 million remaining to be sold. See QUAD 4D, which shows the display 15 after Participant, CUST 3004 has traded with Participant, CUST 3002. The asterisks next to the entries for Participant, CUST 3001 and Participant, CUST 3005 indicate that these initial traders are done or have timed-out. As shown in QUAD 4D above, because there is no longer a current worker, no one can control the trade to the exclusion of others. 20 -21 OUAD4D > 7.625.225 TZ Refno 68119 108.04 Hit 21 108.05+ 36 Cust Buy BOT Cust Sell SOLD *3001 0 10 *3005 0 16 3003 0 1 3004 45 5 3002 0 10 TOTAL 0 21 45 21 As can be appreciated, various Participant moves in the market are often fast paced and, on occasion, position changes may occur almost simultaneously. An example of this 5 may be a first Participant hitting a second Participant's bid of a certain size, via the buy/sell all key-an instant after this second Participant has significantly increased the bid size-say from 5 to 20 million. In this situation, the Aggressor, within the system, has now taken much more than he planned. This situation can be very disturbing in a rapidly shifting market. 10 System logic addresses this problem by creating a supplemental state, known as "Second Look" State. If during this processing, the Passive Side size is increased just prior to a Hit or Lift command, the system discriminates the very recent increase in volume of Offers-Bids from the earlier entries, via an "age" timer, i.e., a system interval that tracks the pendency of all Bids and Offers and creates a Second Look State whenever a Hit/Lift 15 (via buy/sell all key) occurs while a Bid-Offer is under, e.g., two seconds old. The Second Look, however, is limited. The Aggressor must complete the transaction excluding the new, i.e., "unaged" Bid-Offer. This new size is left untraded and others may add more Bids-Offers on this, the Passive Side-but these stay below the line. Even though the Aggressor did not fill the entire size displayed, the Aggressor assumes 20 current worker status and has the right to: 1. Take the new size, creating the Workup State with the contra-trader. 2. Refuse the new size; the Aggressor's refusal (via "done" command) sets the trade into the Workdown State. 25 3. Take/Hit a "partial" amount and then lose priority, with the system then entering the Workdown State The Second Look State is govemed by logic depicted in Figure 9. In this arrangement, the trading command is entered-time stamped at block 1020. The extant - 22 passive maker entries are also entered, block 1030 and Test 1040 determines if the Passive Side entries, PASSIID) are "aged", i.e., not just recently entered. If yes, logic branches to Test 1090, to determine if PASSIID) is the last entry, PASS-END. If not, the next one is incremented with logic returning to the sequence start. 5 A negative response to Test 1040 shifts logic to block 1050 wherein the new entry is parsed; the Aggressor is then given the opportunity to take the new additional size within the trade at Test 1060. The system maintains the commitment of the Aggressor to the original size of the Take or Hit. If accepted, logic branches to Block 1080 and to the Workup State. If negative, logic is shifted to the Workdown State, Block 1070. 10 These principles are delineated in the following sequence of screen displays in QUADS 5A-5C below, wherein Participants, CUST 3001, 3002, and 3003 are showing 5 million, 1 million, and I million, respectively, as having been bought. Just prior to the sell order by Participant, CUST 3007 (HIT ALL), CUST 3004 enters with a 1 million size. All size transacts, except this late I million as it has not "aged" sufficiently-as measured by 15 system interval timer. This amount remains untraded, and the system enters the Second Look State. QUAD 5A > 7.625.225 TZ Refno 68119 108.04 Hit 7 Cust Buy BOT Cust Sell SOLD 3001 0 5 3007 0 7 3002 0 1 3003 0 1 3004 1 0 TOTAL 1 7 0 7 20 If Participant, CUST 3007 decides to fill this outstanding 1.0 million size, the state moves out of "Second Look" and into the Workup State with Participant, CUST 3007 and Participant, CUST 3001 as Current Workers. As shown QUAD 5B, Participant, CUST 3007 has also entered a sell order for a volume of 2 million. The blinking or highlighting of 25 the priority box signifies that the Aggressor is in the Second Look State.

- 23 QUAD SB > 7.625.225 TZ Refno 68119 108.04 Hit 8 0 Cust Buy BOT Cust Sell SOLD 3001 0 5 3007 2 8 3002 0 1 3003 0 1 3004 0 1 TOTAL 0 8 2 8 If, however, Participant, CUST 3007 passes, the trade goes to the Workdown State. (QUAD 5C). New Participant, CUST 3005 now enters and is positioned below the line and 5 can only trade after Participant, CUST 3001 is done and Participant, CUST 3004 trades. QUAD SC > 7.625.225 TZ Refno 68119 108.04 Hit 7 0 Cust Buy BOT Cust Sell SOLD 3001 0 5 3007 0 7 3002 0 1 3003 0 1 3004 1 0 3005 1 0 TOTAL 1 7 0 7 Another state for trading logic is known as the Workdown State, and it occurs when 10 the original Aggressor takes less than all of the size showing on the Passive Side. The remaining size must be worked down to complete the trade. This rewards those Participants that show Bids-Offers (their intent to buy/sell), thus providing liquidity in the market. If the original Aggressor returns for the remaining size from the Passive Side, the Workup State is initiated. Another trader from the Active Side may "Workdown" the 15 remaining Passive Side quantity and the trade will go to the Workup State-with this new trader as the current worker-including obtaining exclusive time if all the remaining size from the original Bid-Offer State is taken.

- 24 The Workdown State allows new Aggressors to complete the remaining un-hit bids on the Passive Side with logic conforming to the flowchart of Figure 10. In this process, the Trading command; CMD(I), is entered at block 1210. At Test 1220, the system confirms that the trade is for less than the total Passive Side, TOTAL. If not, logic 5 branches to block 1280 and is directed to the Workup State. A positive response to Test 1220 passes logic to block 1230 wherein the system opens trading to new Aggressors, to complete the pending Passive Side volume. However, no new Passive Side entries are entitled to exclusive time, block 1240, for the trade duration. Test 1250 confirms the last trade via timer Test 1260; if either results in a "yes", 10 Workdown is terminated and the process returns to the Bid-Offer State. Importantly, new traders presenting on the Passive Side must wait until all the remaining original size is worked down-and their position is held below the line. This is depicted in QUADS 6A-6C. QUAD 6A > 7.625.225 TZ 108.04 15 *108.04+ 25 Cust Bid BOT Cust Offer SOLD 3001 5 0 3007 25 0 3002 10 0 15 TOTAL 15 0 25 0 In QUAD 6A, the Bid-Offer State is depicted with Participant, CUST 3001 showing a bid of 5 million and Participant, CUST 3002, showing a bid of 10 million. As the Aggressor, Participant, CUST 3001, Takes an Offer from Participant, CUST 3007, but only for 5 million of Participant, CUST 3007's showing of 25 million; leaving 20 million 20 on the Passive Side. See QUAD 6B. QUAD 6B > 7.625.225 TZ Refno 68118 108.04 11 108.04+ TAK Cust Buy BOT Cust Sell SOLD *3001 0 5 3007 20 5 TOTAL 0 5 20 5 At this juncture, if Participant, CUST 3006 enters with a 10 million Offer, it must wait until the original Passive Side clears; Participant, CUST 3006 is thus kept below the 25 line as the remaining size is worked down. See QUAD 6C.

-25 QUAD 6C > 7.625.225 TZ Refno 68118 108.04 11 108.04+ TAK 5 Cust Buy BOT Cust Sell SOLD *3001 0 5 3007 20 5 3006 10 0 TOTAL 0 5 30 5 A trade is cleared by a system controlled timer or directly by the Participant, when that price point engenders no further buyers or sellers. The "Clearing" function will 5 resurrect a new Bid-Offer State, retaining original Makers from the Active Side - (unless superceded) and the remaining untraded size from the Passive Side. As discussed above, the system can provide enhanced performance allowing Price Improvement processing. Price Improvement applies a modified interactive Bid-Offer State and transforms the auction process into a multiple price auction process, where buy 10 or sell orders are executed at one or more prices. For Price Improvement, the Bid-Offer State reveals that Participants are willing to trade at prices above or below the current best market prices, particularly at sizes that may be significantly larger than the current sizes shown to the marketplace at the best Bid Offer. All rules of Bid-Offer State apply to each individual price stack or tier under this 15 arrangement. Priority is retained only in the top tier and by the best price, first bidder/offeror. If an Aggressor acts on only one level, then Workup or Workdown State (as previously described) is initiated and limited to that queue's price level. Even in this single level environment, a trade may be "price improved" by system logic. This may occur, for example, if an Aggressor enters the Workup State. In this State, 20 Price Improvement will be triggered by a passive trader, entering a better priced buy/sell. If the initial "best" passive trader matches this new better price, the trade will be consummated, but at a price between (via system defined allocation) this new better price and the original trade price, thus improving the price for both sides of this trade. This is an example of Price Improvement initiated by the Passive Side, via "When" State processing. 25 The same allocation of price would occur if the initial best passive trader declines to match, turning the trade over to the new Passive Side trader. The foregoing demonstrates that, by becoming an Aggressor in a Price Improvement trade, the Aggressor creates the possibility that the buy or sell order may be executed at a better price than is revealed by the current state of Bids and Offers that are - 26 displayed on the system. By doing so, the Aggressor initiates a modified Workup State. (See Figure 8, discussed supra). As shown in QUAD 7A, there are three levels of Bids and Offers. The number of levels of Bids and Offers depicted is a system parameter and is typically tied to the number 5 of price increments on the Bid and Offer sides, i.e., a cardinal arrangement (e.g., 1132 increments); an alternative tier arrangement includes an ordinal arrangement (e.g., "top five tiers"). All Participants will be aware that there are four bids for a total of 67 million (2 + 20 + 45), ranging from 100.01 down to 100.00 and five offers for a total of 85 million (15 + 10 + 60), ranging from 100.02 up to 100.03 + . This contrasts with the single queue Bid 10 Offer State where only two Bids totaling 2 million at 100.01 and two Offers totaling 15 million at 100.02 are shown. An alternative arrangement applies logic (not shown) that may not disclose all prices and sizes to all Participants. In this case, system logic controls the secondary tiers and buy and sell allocations. 15 QUAD 7A 100.01 2 100.02 15 Cust Bid BOT Cust Offer SOLD 2001 1 0 2007 5 0 2002 1 0 2006 10 0 TOTAL 2 0 15 0 100.00+ 20 100.03 10 2005 20 2008 10 0 TOTAL 20 10 0 100.00 45 100.03+ 60 2012 45 2007 20 2011 40 TOTAL 45 60 0 100.45x.00 20 x .00+ 2x 2x .01 X 15x .02 10x.03 60x .03+ The logic of the Workup State with Price Improvement encourages Participants to reveal their trading intentions even away from the best price shown by allowing them to participate in a Price Improvement trade if one is initiated. For example, Price 20 Improvement will attach to a Participant by becoming an Aggressor away from the best market prices of 100.01 and 100.02. By revealing this intention, the Aggressor gains first priority for potential price improvement during execution of the volume associated with the price surplus. Priority rankings provide the opportunity for purchases and sales at better - 27 prices than the best market of 100.01 and 100.02 by allowing the Buyers or Sellers Surplus that is created upon the initiation of a Price Improvement trade to be allocated among the Participants. The Aggressor who initiates the Price Improvement trade is granted protection by 5 allowing contra-traders) to buy or sell more at the higher or lower prices shown as the case may be. This is accomplished through system logic that measures the surplus and allocates any available surplus among the trader and the contra-traders. By allowing one or both sides of the trade to execute trades at better prices than their respective revealed intentions, aggressive and/or passive traders are better off. The system benefits the market by creating 10 greater liquidity, improving revealed intentions of bidders and offerors, increasing depth of markets, allowing multiple price trades, and forming the foundation for alternative commission fees. Once trading commences, state sequencing follows the logic of a single price trade. For example, in the Price Improvement Bid-Offer State, shown in QUAD 7A, a new seller 15 becomes the Aggressor with a command to sell 90 million down to 99.31 (i.e., 99 + 31/32nds). In order to improve the seller's ability to sell at the "best price" available, the first best bidder whose priority is ranked on a price and time basis, or by metric comprised therefrom, or including size as well, is given the opportunity to buy additional volumes at an improved price after the 67 million has been Hit, i.e., 2 million sold at 100.01, 20 20 million sold at 100.00+, and 45 million sold at 100.00. By offering to sell a total of 90 million down to 99.31, the seller sells the first 67 million and has "intent" to sell 23 million more. The first best bidder now can execute more at an improved price. The level of improvement is allocated between the bid price of 100.01 (i.e., 100 + 1/32nd) and the 99.31 reservation price. Thus, if buyer 2001 trades the remaining 23 million with the 99.31 25 seller, then a Price Improvement trade of 23 Hit at 100.00 is consummated. Here, buyer 2001 maintains his/her priority by committing to buy 23 million more at his/her bid level of 100.01. However, the actual trade price is 100.00 providing the buyer with .01 (1/32) price improvement and the seller with a like amount .01 price improvement over his/her reservation price of 99.31. 30 The system logic has apportioned the Trader Surplus between the aggressive and passive sides of the trade, benefitting both parties. System logic could also allocate the surplus alternatively, e.g., providing the Aggressor with 2/3, all or none of the surplus. The allocation mechanism could also dynamically change depending on the size of the trade or other customer or trade characteristics. The system flashes the sequence of three trades, 2 -28 @ 100.0 1, 20 @ 100.00+, 68 (45 + 23) @ 100.00, incorporating highlighting that indicates that the sequence is a set of Price Improvement trades. Alternatively, the total trade at the average price could be displayed. At the end of the trade, the system logic returns control to the Bid-Offer State. 5 Under Price Improvement processing, there are separate mechanisms to present and display multiple Bid-Offers at different price levels. The first option is to remove all out of market Bid-Offers, i.e., all inferior offerings are not displayed. The second option provides the bidder with the choice as to whether his/her inferior bid is left on the display, or removed when topped with a better price. The third option is to display all bids on screen 10 even when topped. This forms a "good till cancel" offering. Another option allows Participants to customize their Bids and Offers under system controlled parameters. Price Improvement processing also permits priority preserved trading, known as the When State. The When State occurs when a non-priority Participant initiates or responds to a trading command. Under this circumstance, system logic triggers the When State, and 15 this allows the priority bidder, e.g., first best price on the passive market side, to intercede and assume control of the trade. A timer controls the period of time given to the priority bidder during the When State to decide whether to intercede, the original buyer (whose trading command initiated the When State) is placed right behind the priority bidder, and other non-priority buyers are placed in sequence behind the first Aggressor. If, however, 20 the priority bidder does not intercede, logic turns the trade over to the ranked list of buyers and the trade moves to the Workup or Workdown State for completion. By interceding, the first best bidder maintains priority by matching the best price among the When Take trades. Here, initiating a Price Improvement, the Hit, highlighted by video attribute, is for 25 more size than is shown on the number of tiers of Bids or Offers that are available for price improvement. In order to provide a greater and more diverse opportunity for price improvement and to protect the price improvement Aggressor, all buy and sell orders received during Exclusive Time are ranked and matched to provide the greatest amount of price protection 30 to the price improvement Aggressor. Because of multi-levels of Bids and Offers, the first best bidder/offeror will maintain priority only if he/she responds at his/her price, or, if necessary, matches the best When Take/Hit price. As shown in QUAD 7B, Participant CUST 2008 becomes the Aggressor by initiating a Price Improvement trade by committing to sell 90 million down to a price of - 29 99.31. During Exclusive Time, Participant CUST 2001 commits to buy 5 million more at 100.01, Participant CUST 2009 commits to buying 20 million at 100.01+, and Participant CUST 2002 commits to buying 5 million more at 100.01. Customer 2001 does not then match the buy price of 100.01+. 5 QUAD 7B 100.01 to .00 HIT 67 Cust Buy BOT Cust Sell SOLD 100.01+ 2009 20 100.01 2001 5 1 2008 23 67 2002 5 1 TOTAL 2 100.00+ 2005 0 20 TOTAL 20 100.00 2012 0 45 TOTAL 67 CUST 2001 has a priority over Participant CUSTS 2002 and 2009 by having been 10 the original best bidder and commits to buying-more at his/her original price. At the end of the Exclusive Time, 20 of the 23 million to be sold is matched with the best buys shown, hence 20 million is sold to 2009. The remaining 3 million is sold to Participant CUST 2001. By not matching the 100.01 + price, CUST 2001 only obtains the 3 million. By maintaining price and time priority, price improvement is obtained and the Aggressor is 15 protected. The trades are shown in QUAD 7C. 20 -30 QUAD 7C 100.00 X 45 .00 + X23 .O1X22HIT Cust Buy BOT Cust Sell SOLD 100.01 2001 1 2008 22 2002 1 2009 20 TOTAL 22 22 100.00+ 2005 20 2008 23 2001 3 TOTAL 23 100.00 2012 45 2008 45 TOTAL 45 45 TOTAL 90 90 Participants interact with system, logic during Price Improvement trading via an input device. Various input devices can be used as exemplified by the specialized keyboard 5 depicted in Figure 12. The keyboard includes special LCD keys, whose function and display is directly tied to the state of the Trading Processor. The keyboard has two vertical rows of 5 LCD keys each and a horizontal row of 7 LCD keys. The horizontal row of LCD keys dynamically display the three different price levels available on both the Bid and in Offer sides. This row is called the "Price Row". This display updates in real-time as prices 10 change in the Trading Processor. The center key in this row shows a price incrementor value. The most appropriate incrementor value is determined by the Trading Processor, based on the range of the Spread between the best and worst markets. This incrementor value is also updated real-time as prices change. The bid prices travel to the left of the keyboard from the center key in order of best to worst. Similarly, the Offer prices travel to 15 the right. As different price levels appear in the Price Improvement Bid-Offer State, they are displayed in the Price Row. To facilitate data entry and quickly react to the market, the Participant simply needs to press one of the LCD keys to chose which price level he wants to trade. After selecting the price, the Participant will choose one of the action keys represented by the vertical row of the LCD keys. If the Participant wants to trade below or 20 above the prices present in the market at that point, the Participant can use the incrementor key to indicate how far below or above he wants to go.

-31 The capabilities of the foregoing keyboard arrangement can be realized in several alternate embodiments. For example, the input commands can be arranged on a touch screen, touch pad transducer (e.g., "mouse"). Other vehicles for inputting commands include voice command, voice activated navigation, and other "location" devices that may 5 be exchanged as is, per se, well known in the art. The use of the term key is meant to include a command or data entry trigger, i.e., a device or switch, that when activated accomplishes a particular task. The logic associated with the five states discussed herein is summarized in tabular form in Figure 11. Features of the foregoing system have resulted in a dramatic increase in 10 efficiency and reduction of order errors. The often frenetic environment of Bidding, Offering, and Trading and the entry of commands on the preferred dedicated keypad, shown in Figures 3A-B, and the likelihood of Participants changing their minds all contribute to the possibility that a trade has been made in error. More particularly, errors can arise due to incorrect entries into the system, a 15 miscommunication between Participant and the like. These errors can often force a "principal" Participant into an unintended position during a trade. This embodiment of the invention preferably provides ways for the Participant to effectively "undo" a trade, either by canceling a pending order, or rolling back executions during a trade State. As shown in Figures 3A-B, the keypad provides CANCEL, DONE, 20 and UNDO keys to facilitate this process. The function of these keys when the system is in a particular state is described below, it being understood that the names given these keys are arbitrary and any input means can be used to effect the desired action(s). In the Bid-Offer State, the CANCEL command removes a maker's existing markets from one or more instruments. 25 In the When State, CANCEL removes a maker's markets only if there are no pending active BUY or SELL orders against it. Also, DONE removes a potential Aggressor, as well as trade Participants, from trading lists before orders are matched. During the Workdown State, CANCEL removes any remaining passive maker's markets. DONE performs the same function as CANCEL and also allows the Passive 30 trading Participants in the Workdown State to remove themselves from trading lists, thereby effectively removing their committed sizes before the system has had a chance to execute them. UNDO functions to "unroll" the trade and reduce the size shown to Participants if executed during a predefined time period after the initial trade. Additionally, the UNDO function 'proportionately reduces the amount traded by all passive Makers. The -32 restriction of a predefined time period discourages a trader from taking unfair advantage of this correction facility. Analogously, if no more than one trader participated in the trade, then the UNDO function causes the trader to join the contra-side for the size desired to be undone. The UNDO function can be invoked at any time by any Participant, on the Active 5 Side or the Passive Side; the system applies controlling logic to maintain the fairness of this trading protocol. During the Workup State, a Participant can use the DONE function to remove himself from being a Participant from the Active Side or the Passive Side, or both sides simultaneously, regardless of the size traded or solicited. Thus, the DONE function 10 removes the Participant from the trade. The UNDO function can also roll back the trade provided that the first active trader has executed this function within a predefined time period following the trade. If the UNDO function is not invoked during this predefined period, or the trader is not the first active trader, then the trader is entered in the queue to buy or sell oil the contra-side immediately. Preferably, the trader is placed at the top of the 15 list so that the UNDO function can be effectively invoked immediately, provided there is a contra-trader. Most preferably, the rights of the first active and passive traders will be maintained to assure fairness. Although the invention has been described in detail for the purpose of illustration, it is to be understood that such detail is solely for that purpose and that variations can be 20 made therein by those skilled in the art without departing from the spirit and scope of the invention except as it may be limited by the claims. The term "comprise" and variants of that term such as "comprises" or "comprising" are used herein to denote the inclusion of a stated integer or integers but not to exclude any other integer or any other integers, unless in the context or usage an exclusive 25 interpretation of the term is required. Reference to prior art in this specification is not an admission that such prior art is common general knowledge in Australia.

Claims (12)

1. A method of electronic interactive buying and selling of items via a data processing system comprising a server and a plurality of workstations in communication with said 5 server, said workstations used by Participants for entering commands having prices and volumes, said server receiving said commands, said method comprising: receiving a first bid command having a first price and a first volume for an item; receiving a second bid command having a second price and a second volume for said item; 10 receiving a sell command having a third price and a third volume for said item, said third volume larger than the sum of said first and second volumes, said third price lower than said first price and said second price; executing a transaction at said first price for said first volume in response to receiving said sell command; 15 executing a transaction at said second price for said second volume in response to receiving said sell command; setting a transaction price between said third price and the lower of said first and second prices at which a transaction for the difference between said third volume and the sum of said first and second volumes can be completed; and 20 providing a limited time period during which only the Participant that entered the higher of said first and second prices can execute a transaction at said set transaction price.

2. A method of electronic interactive buying and selling of items via a data processing system comprising a server and a plurality of workstations in communication with said 25 server, said workstations used by Participants for entering commands having prices and volumes, said server receiving said commands, said method comprising: receiving a first offer command having a first price and a first volume for an item; receiving a second offer command having a second price and a second volume for said item; 30 receiving a buy command having a third price and a third volume for said item, said third volume larger than the sum of said first and second volumes, said third price higher than said first price and said second price; executing a transaction at said first price for said first volume in response to receiving said buy command; -34 executing a transaction at said second price for said second volume in response to receiving said buy command; setting a transaction price between said third price and the higher of said first and second prices at which a transaction for the difference between said third volume and the 5 sum of said first and second volumes can be completed; and providing a limited time period during which only the Participant that entered the lower of said first and second prices can execute a transaction at said set transaction price.

3. A method of electronic interactive buying and selling of items via a data processing 10 system comprising a server and a plurality of workstations in communication with said server, said workstations used by Participants for entering commands having prices and volumes, said server receiving said commands, said method comprising: receiving a bid command having a first price and a first volume for an item; receiving a sell command having a second price and a second volume for said item, 15 said second volume larger than said first volume, said second price lower than said first price; executing a transaction at said first price for said first volume in response to receiving said sell command; receiving a buy command having a third price that is higher than said second price 20 and a volume equal to at least a portion of the difference between said first and second volumes; calculating a transaction price between said first and second prices in response to receiving said buy command at which a transaction for said portion is completed; and displaying an indication of price improvement availability in response to receiving 25 said buy command.

4. A method of electronic interactive buying and selling of items via a data processing system comprising a server and a plurality of workstations in communication with said server, said workstations used by Participants for entering commands having prices and 30 volumes, said server receiving said commands, said method comprising: receiving an offer command having a first price and a first volume for an item; receiving a buy command having a second price and a second volume for said item, said second volume larger than said first volume, said second price higher than said first price; - 35 executing a transaction at said first price for said first volume in response to receiving said buy command; receiving a sell command having a third price that is lower than said second price and a volume equal to at least a portion of the difference between said first and second 5 volumes; calculating a transaction price between said second and third prices in response to receiving said sell command at which a transaction for said portion is completed; and displaying an indication of price improvement availability in response to said sell command. 10

5. A method of electronic interactive buying and selling of items via a data processing system comprising a server and a plurality of workstations in communication with said server, said workstations used by Participants for entering commands having prices and volumes, said server receiving said commands, said method comprising: 15 receiving a first bid command having a first price and a first volume for an item; receiving a second bid command having a second price and a second volume for said item; receiving a sell command having a third price and a third volume for said item, said third volume larger than the sum of said first and second volumes, said third price lower 20 than said first price and said second price; executing a transaction at said first price for said first volume in response to receiving said sell command; executing a transaction at said second price for said second volume in response to receiving said sell command; 25 receiving a buy command having a fourth price that is higher than said third price and a volume equal to at least a portion of the difference between said third volume and the sum of said first and second volumes; setting a transaction price between said third price and said fourth price in response to receiving said buy command at which a transaction for said portion is completed; and 30 providing a limited time period during which only the Participant that entered the higher of said first and second prices can execute a transaction at said set transaction price.

6. A method of electronic interactive buying and selling of items via a data processing system comprising a server and a plurality of workstations in communication with said -36 server, said workstations used by Participants for entering commands having prices and volumes, said server receiving said commands, said method comprising: receiving a first bid command having a first price and a first volume for an item; receiving a second bid command having a second price and a second volume for 5 said item; receiving a sell command having a third price and a third volume for said item, said third volume larger than the sum of said first and second volumes, said third price lower than said first price and said second price; executing a transaction at said first price for said first volume in response to 10 receiving said sell command; executing a transaction at said second price for said second volume in response to receiving said sell command; receiving a buy command having a fourth price that is higher than said third price and a volume equal to at least a portion of the difference between said third volume and the 15 sum of said first and second volumes; setting a transaction price between said third price and said fourth price in response to receiving said buy command at which a transaction for said portion is completed; and displaying an indication of price improvement availability in response to receiving said buy command. 20

7. A method of electronic interactive buying and selling of items via a data processing system comprising a server and a plurality of workstations in communication with said server, said workstations used by Participants for entering commands having prices and volumes, said server receiving said commands, said method comprising: 25 receiving a first offer command having a first price and a first volume for an item; receiving a second offer command having a second price and a second volume for said item; receiving a buy command having a third price and a third volume for said item, said third volume larger than the sum of said first and second volumes, said third price higher 30 than said first price and said second price; executing a transaction at said first price for said first volume in response to receiving said buy command; executing a transaction at said second price for said second volume in response to receiving said buy command; -37 receiving a sell command having a fourth price that is lower than said third price and a volume equal to at least a portion of the difference between said third volume and the sum of said first and second volumes; setting a transaction price between said third price and said fourth price in response 5 to receiving said sell command at which a transaction for said portion is completed; and providing a limited time period during which only the Participant that entered the lower of said first and second prices can execute a transaction at said set transaction price.

8. A method of electronic interactive buying and selling of items via a data processing 10 system comprising a server and a plurality of workstations in communication with said server, said workstations used by Participants for entering commands having prices and volumes, said server receiving said commands, said method comprising: receiving a first offer command having a first price and a first volume for an item; receiving a second offer command having a second price and a second volume for said 15 item; receiving a buy command having a third price and a third volume for said item, said third volume larger than the sum of said first and second volumes, said third price higher than said first price and said second price; executing a transaction at said first price for said first volume in response to 20 receiving said buy command; executing a transaction at said second price for said second volume in response to receiving said buy command; receiving a sell command having a fourth price that is lower than said third price and a volume equal to at least a portion of the difference between said third volume and the 25 sum of said first and second volumes; setting a transaction price between said third price and said fourth price in response to receiving said sell command at which a transaction for said portion is completed; and displaying an indication of price improvement availability in response to receiving said sell command. 30

9. A method of electronic interactive buying and selling of items via a data processing system comprising a server and a plurality of workstations in communication with said server, said workstations used by Participants for entering commands having prices and - 38 volumes, said server receiving said commands, said method comprising: receiving a first bid command having a first price and a first volume for an item; receiving a second bid command having a second price and a second volume for said item; 5 receiving a sell command having a third price and a third volume for said item, said third volume larger than the sum of said first and second volumes, said third price lower than said first price and said second price; executing a transaction at said first price for said first volume in response to receiving said sell command; 10 executing a transaction at said second price for said second volume in response to receiving said sell command; setting a transaction price between said third price and the lower of said first and second prices at which a transaction for the difference between said third volume and the sum of said first and second volumes can be completed; and 15 displaying an indication of price improvement availability in response to receiving said sell command.

10. A method of electronic interactive buying and selling of items via a data processing system comprising a server and a plurality of workstations in communication with said 20 server, said workstations used by Participants for entering commands having prices and volumes, said server receiving said commands, said method comprising: receiving a first offer command having a first price and a first volume for an item; receiving a second offer command having a second price and a second volume for said item; 25 receiving a buy command having a third price and a third volume for said item, said third volume larger than the sum of said first and second volumes, said third price higher than said first price and said second price; executing a transaction at said first price for said first volume in response to receiving said buy command; 30 executing a transaction at said second price for said second volume in response to receiving said buy command; setting a transaction price between said third price and the higher of said first and second prices at which a transaction for the difference between said third volume and the sum of said first and second volumes can be completed; and -39 displaying an indication of price improvement availability in response to receiving said buy command.

11. A method of electronic interactive buying and selling of items via a data processing 5 system comprising a server and a plurality of workstations in communication with said server, said workstations used by Participants for entering commands having prices and volumes, said server receiving said commands, said method comprising: receiving a bid command having a first price and a first volume for an item; receiving a sell command having a second price and a second volume for said item, 10 said second volume larger than said first volume, said second price lower than said first price; executing a transaction at said first price for said first volume in response to receiving said sell command; receiving a buy command having a third price that is higher than said second price 15 and a volume equal to at least a portion of the difference between said first and second volumes; calculating a transaction price between said first and second prices in response to receiving said buy command at which a transaction for said portion is completed; and providing a limited time period during which only the Participant that entered the 20 higher of said first and third prices can execute a transaction at said set transaction price.

12. A method of electronic interactive buying and selling of items via a data processing system comprising a server and a plurality of workstations in communication with said server, said workstations used by Participants for entering commands having prices and 25 volumes, said server receiving said commands, said method comprising: receiving an offer command having a first price and a first volume for an item; receiving a buy command having a second price and a second volume for said item, said second volume larger than said first volume, said second price higher than said first price; 30 executing a transaction at said first price for said first volume in response to receiving said buy command; receiving a sell command having a third price that is lower than said second price and a volume equal to at least a portion of the difference between said first and second volumes; - 40 calculating a transaction price between said second and third prices in response to receiving said sell command at which a transaction for said portion is completed; and providing a limited time period during which only the Participant that entered the lower of said first and third prices can execute a transaction at said set transaction price. 5