JP6105799B1 - Equipment used for trading securities - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus used for buying and selling securities configured to provide a new service to a user. A server device according to an embodiment is a server device used for buying and selling securities, and is associated with each of a plurality of brands held in an account opened by a predetermined user at a financial institution. , Storage means for storing at least the market price unit and the target ratio, input means for inputting an investment amount to be newly invested to purchase one of the brands, and based on the quantity and the market price unit price of each brand, Calculate the market capitalization of the brand and the market capitalization of all the multiple brands, and calculate a hypothetical ratio that is the ratio of the market capitalization of each brand to the total market capitalization, which is the sum of the investment amount and the market capitalization of all the multiple brands Determining means configured to calculate and determine a purchase target brand based on a difference between the virtual ratio and the target ratio of each brand. [Selection] FIG.

Description

  The technology disclosed in the present application relates to an apparatus used for trading securities.

  A device disclosed in Japanese Patent Laid-Open No. 2006-268557 (Patent Document 1) is known as an apparatus used for buying and selling securities. Patent Document 1 discloses an apparatus that executes a process called “rebalance” in which a stock is bought and sold so as to bring the current portfolio closer to a targeted portfolio. Incorporated herein).

JP 2006-268557 A

  Various embodiments of the present invention provide an apparatus used for trading securities configured to provide new services to a user.

  A server device according to an aspect of the present invention is a server device used for buying and selling securities, and is associated with each of a plurality of brands held in an account opened by a predetermined user in a financial institution, in quantity, market price Based on the storage means for storing at least the unit price and the target ratio, the input means for inputting the investment amount to be newly invested to purchase one of the brands, and the quantity and the market price of each brand, Calculate the market capitalization and the market capitalization of all of the multiple issues, and calculate a hypothetical ratio that is the ratio of the market capitalization of each issue to the total market capitalization, which is the sum of the investment amount and the market capitalization of the entire multiple issues. And determining means configured to determine a purchase target brand based on a difference between the virtual ratio and the target ratio of each brand.

  A method according to an aspect of the present invention is a method executed by a computer for buying and selling securities, and is associated with each of a plurality of issues held in an account opened by a predetermined user at a financial institution, Each brand is based on at least storing the quantity, market price and target ratio, entering a new investment amount to purchase any brand, and based on the quantity and market price of each brand. And calculating a market capitalization of all of the plurality of issues, and a hypothetical ratio that is a ratio of the market capitalization of each issue to the total market capitalization, which is the sum of the investment amount and the market capitalization of all of the plurality of issues And a step of determining a purchase target brand based on a difference between the virtual ratio and the target ratio of each brand.

  The computer program according to one aspect of the present invention relates to each of a plurality of stocks held in an account opened by a predetermined user in a financial institution for buying and selling securities. A storage means for storing at least the target ratio, an input means for inputting an investment amount to be newly invested to purchase one of the brands, and a market capitalization of each brand based on the quantity and the market price unit of each brand And calculating the market capitalization of the entire plurality of issues, calculating a virtual ratio that is the ratio of the market capitalization of each issue to the total market capitalization, which is the sum of the investment amount and the market capitalization of the entire plurality of issues, It is made to function as a determination means configured to determine a purchase target brand based on a difference between the virtual ratio of the brand and the target ratio.

  A terminal device according to an aspect of the present invention is a terminal device used for buying and selling securities, and is associated with each of a plurality of brands held in an account opened by a predetermined user at a financial institution, in quantity, market price Based on the storage means for storing at least the unit price and the target ratio, the input means for inputting the investment amount to be newly invested to purchase one of the brands, and the quantity and the market price of each brand, Calculate the market capitalization and the market capitalization of all of the multiple issues, and calculate a hypothetical ratio that is the ratio of the market capitalization of each issue to the total market capitalization, which is the sum of the investment amount and the market capitalization of the entire multiple issues. And determining means configured to determine a purchase target brand based on a difference between the virtual ratio and the target ratio of each brand.

FIG. 1 is a diagram illustrating an example of a state in which a portfolio constructed in a securities trading system according to an embodiment of the present invention is in an appropriate state. FIG. 2 is a diagram showing an example of a state in which a portfolio constructed in the securities trading system according to an embodiment of the present invention is in an inappropriate state. FIG. 3 is a diagram illustrating an example of a state in which a portfolio that has been constructed in the securities trading system according to an embodiment of the present invention is in an improper state has been brought into an appropriate state by rebalancing processing. FIG. 4 is a diagram showing an example of how a portfolio in an inappropriate state constructed in the securities trading system according to an embodiment of the present invention is changed by additional investment according to a normal method. It is. FIG. 5 is a diagram showing an example of how a portfolio that is in an inappropriate state constructed in the securities trading system according to an embodiment of the present invention changes due to additional investment according to a special technique. It is. FIG. 6 is a block diagram showing an example of the configuration of a securities trading system according to an embodiment of the present invention. FIG. 7 is a block diagram showing an example of the configuration of the trading server 10 (each server constituting the trading server 10) used in the securities trading system shown in FIG. FIG. 8 is a block diagram showing an example of the configuration of the terminal device 30 used in the securities trading system 1 shown in FIG. FIG. 9 is a block diagram showing an example of functions of the trading server 10 used in the securities trading system 1 shown in FIG. FIG. 10 is a flowchart showing an example of operations performed in the securities trading system 1 shown in FIG. FIG. 11 is a diagram illustrating a specific numerical example for explaining processing performed by the trading server 10 in the securities trading system shown in FIG. 6. FIG. 12 is a diagram conceptually showing processing performed by the trading server 130 in the securities trading system shown in FIG. FIG. 13 is a diagram conceptually showing processing performed by the trading server 130 in the securities trading system shown in FIG. FIG. 14 is a diagram showing an example of information related to user assets stored in the database server 16 of the trading server 10 used in the securities trading system 1 shown in FIG. FIG. 15 shows an example of how a portfolio that was in an inappropriate state constructed in a securities trading system according to another embodiment of the present invention changes due to partial sale according to a normal method. FIG. FIG. 16 shows an example of how a portfolio that was in an inappropriate state constructed in a securities trading system according to another embodiment of the present invention changes due to partial sale according to a special method. FIG. FIG. 17 is a flowchart showing an example of operations performed in the securities trading system according to another embodiment of the present invention. FIG. 18 is a diagram conceptually showing processing performed by the trading server 130 in the securities trading system according to another embodiment of the present invention.

  Hereinafter, various embodiments of the present invention will be described with reference to the accompanying drawings. In addition, the same referential mark is attached | subjected to the component requirements common in an accompanying drawing.

1. A securities trading system according to an embodiment is a securities trading system according to an embodiment, in which a user (user A) has a plurality of issues held in an account opened in a financial institution (a portfolio is constructed by these multiple issues). The rebalancing process can be performed to sell or purchase an appropriate quantity of at least one stock so that each market cap occupies a specific ratio to the market capitalization of multiple stocks. It is. By executing this rebalancing process, the portfolio will be in a state where the market capitalization of each issue occupies a specific ratio with respect to the market capitalization of all issues (hereinafter referred to as “appropriate state” for convenience). As a result of the change in the market capitalization of any stock over time, the portfolio has the ratio of the market capitalization of any stock to the market capitalization of multiple stocks There is a possibility of different states (hereinafter referred to as “unsuitable states” for convenience). In such an improper state, the user A may invest in additional funds in the portfolio to purchase one of the brands. In such an aspect, the securities trading system according to the present embodiment determines a purchase target issue so that the portfolio is in an appropriate state (or approaches an appropriate state) without performing a separate rebalancing process. The process to purchase is executed.

First, the characteristics of the securities trading system according to this embodiment will be briefly described with reference to FIGS.
FIG. 1 is a diagram illustrating an example of a state in which a portfolio constructed in a securities trading system according to an embodiment of the present invention is in an appropriate state. FIG. 2 is a diagram showing an example of a state in which a portfolio constructed in the securities trading system according to an embodiment of the present invention is in an inappropriate state. FIG. 3 is a diagram illustrating an example of a state in which a portfolio that has been constructed in the securities trading system according to an embodiment of the present invention is in an improper state has been brought into an appropriate state by rebalancing processing. FIG. 4 is a diagram showing an example of how a portfolio in an inappropriate state constructed in the securities trading system according to an embodiment of the present invention is changed by additional investment according to a normal method. It is. FIG. 5 is a diagram showing an example of how a portfolio in an inappropriate state constructed in the securities trading system according to an embodiment of the present invention is changed by additional investment according to a special method. It is.

  Here, for simplification of explanation, the brand A, B and C are held in the account opened by the user A in the financial institution, and the brands A, B and C occupy the market capitalization of these brands as a whole. A case where the target ratios are 50%, 25%, and 25%, respectively, will be described.

  FIG. 1 shows an example of a portfolio that is in the “right state”. Specifically, FIG. 1A shows the market price unit price of each of the brands A to C. In FIG. 1B, the portfolio held by the user A assigned “0001” as the customer ID is associated with each of the brands A to C, and the quantity held (number of units, number of shares, face value, etc.). ), Appraisal value (market capitalization), current ratio, target allocation amount, and deviation from the target.

  Here, the evaluation amount (market capitalization) (yen) is calculated by the market price unit price of each brand x the quantity held. The current ratio (%) is the ratio of the valuation amount (market capitalization) of each brand to the market capitalization (40,000 yen) of the entire brand A to C, and 100 × valuation / brands A to C Calculated based on the total market capitalization. The target allocation amount (yen) is an evaluation amount that each stock should have in order to occupy the target ratio. The deviation (yen) from the target is a difference between the evaluation value of each brand and the target distribution amount, and is calculated by the evaluation amount-target distribution amount.

  FIG. 2 shows an example of a portfolio in an “inappropriate state”. Specifically, FIG. 2A shows the market price unit prices of the brands A to C. Compared to FIG. 1A, the market price unit prices of the brands B and C are fluctuating. It is understood. In FIG. 2 (b), as in FIG. 1 (b), the portfolio owned by user A with “0001” assigned as the customer ID is associated with each of the brands A to C, and the quantity held and evaluation Amount (market capitalization), current ratio, target allocation amount and deviation from the target are shown.

  As is clear by comparing FIG. 1 and FIG. 2, the market unit price of the stocks B and C has changed from 50 yen and 20 yen to 40 yen and 40 yen, respectively (stocks The total market capitalization of A to C fluctuates to 48,000 yen), and the ratio of brands A to C fluctuates to 41.67%, 16.67% and 41.67%, respectively, and the target distribution ratio (50 each) %, 25% and 25%).

  When the portfolio is in an inappropriate state as shown in FIG. 2, the portfolio can be returned to an appropriate state by executing the rebalancing process. For example, a rebalancing process is performed in which 40 quantities of the brand A are purchased, 100 quantities of the brand B are purchased, and 200 quantities of the brand C are sold (results that the quantities of the brands A to C are 240, 300, and 300, respectively). 3), the ratios of the brands A to C are returned to 50%, 25%, and 25%, respectively (which are the same as the target ratios of the brands A to C), respectively. By such a rebalancing process, the ratio of each brand is returned to the target ratio without changing the market capitalization (48,000 yen) of the whole brand A to C (the portfolio that was in the inappropriate state shown in FIG. 2). Can be returned to an appropriate state). Depending on the content of the portfolio, it goes without saying that a rebalancing process may be executed in which at least one of the brands A to C is sold and at least one of the remaining brands is purchased. Absent.

  When a portfolio that has been in an appropriate state shifts to an inappropriate state, it is possible to execute a rebalance process each time. However, since the rebalancing process involves purchase and / or sale of stocks, at least one of the user A and the financial institution may incur a fee associated with such purchase and / or sale. (It goes without saying that whether or not a fee is charged depends on the service provided by the financial institution). Therefore, it can be said that it may be preferable to execute the rebalancing process at regular intervals, for example, rather than unconditionally frequently.

  On the other hand, in the case where the portfolio is in an inappropriate state, there may be a phase in which the user A invests new funds in the portfolio and purchases any brand (additional investment). In such a situation, the case of performing additional investment according to a normal method will be described with reference to FIG. Here, it is assumed that, for example, 32,000 yen is additionally invested when the portfolio is in an inappropriate state as shown in FIG. In a normal method, this investment amount of 32,000 yen is distributed to each brand at a ratio proportional to the target ratio of brands A to C. That is, since the target ratio of the brand A is 50%, 16,000 yen is distributed to the brand A, and similarly, the target ratios of the brands B and C are 25% and 25%, respectively. 8,000 yen will be distributed to each C. Accordingly, 160 quantities (= 16,000 ÷ 100) of the brand A are purchased, 200 quantities (8,000 ÷ 40) of the brand B are purchased, and 200 quantities (8,000 ÷ 40) of the brand C are purchased. As a result, as shown in FIG. 4, the numbers of brands A to C are 360, 400, and 700, respectively, and the ratios of brands A to C are 45%, 20%, and 35%, respectively, which are still different from the target ratio. ing. The total market capitalization of the brands A to C is 80,000 yen (= 48,000 yen + 32,000 yen).

  In the same situation as described above, the case of performing additional investment according to a special technique will be described with reference to FIG. Here again, for example, if the portfolio is in an inappropriate state as shown in FIG. In a special method, the investment amount of 32,000 yen is such that the ratio of each brand after the investment is invested in at least one of the brands A to C is substantially the same as the target ratio. It is distributed to at least one of the brands A to C. For example, as shown in FIG. 5, 20,000 yen and 12,000 yen are distributed to the brands A and B, respectively, but not to the brand C at all. As a result, 200 quantities (= 20,000 ÷ 100) of the brand A are purchased and 300 quantities (1,2000 ÷ 40) of the brand B are purchased. As a result, as shown in FIG. 5, the quantities of brands A to C are 400, 500, and 500, respectively, and the ratios of brands A to C are 50%, 25%, and 25%, respectively, which are the same as the target ratio. ing. The market capitalization of the entire brands A to C is 80,000 yen (= 48,000 yen + 32,000 yen) as in the case of using a normal method (FIG. 4). In this way, according to the special method, the rebalancing process can be executed at the same time as the additional investment is made without executing a separate rebalancing process (while suppressing the fees associated with the rebalancing process). Can do.

  In addition, what is disclosed by patent document 1 is only performing a rebalance process. The technical idea of performing the rebalancing process simultaneously with the additional investment and / or the partial sale as disclosed in the present specification is completely disclosed or suggested in Patent Document 1. There is nothing.

1-1. Overall configuration of a trading system of securities according to the embodiment FIG 6 is a block diagram showing an example of the configuration of a trading system of securities according to an embodiment of the present invention. As shown in FIG. 6, the securities trading system 1 mainly includes a trading server 10 and a plurality of terminal devices 30-1 connected to the trading server 10 via a communication network 20 including the Internet. 30-2,..., 30-N (hereinafter may be collectively referred to as “terminal device 30”).

  In the present embodiment, the trading server 10 is connected to the calculation server 12, the web server 14 connected to the calculation server 12, the database server 16 connected to the calculation server 12 and the web server 14, and the database server 16. Securities server 18. In another embodiment, the trading server 10 is configured as one or a plurality of databases so as to perform all of the functions performed by each of the calculation server 12, the web server 14, the database server 16, and the securities server 18. It may be.

  The web server 14 generates HTML data for displaying a web page using various information received from the calculation server 12 and the database server 16 according to the information received from the terminal device 30 and transmits the HTML data to the terminal device 30. To do. The database server 16 stores information received from each of the web server 14, the calculation server 12, and the securities server 18, and transmits the stored information to the calculation server 12 and the web server 14. The calculation server 12 executes various processes and operations based on information received from the web server 14 and the database server 16, and transmits the results of such processes and operations to the web server 14 and the database server 16. . The stock server 18 receives various information related to securities from a server device (not shown) arranged on a stock exchange (not shown) (Tokyo Stock Exchange, New York Stock Exchange, etc.). The information received as such is transmitted to the database server 16.

  The user transmits / receives various information to / from the trading server 10 (particularly the web server 14) using the terminal device 30 of the user, and thereby various services related to trading of securities (hereinafter referred to as “securities trading service”). ")".

1-2. Configuration of Trading Server 10 A configuration common to the calculation server 12, the web server 14, the database server 16, and the securities server 18 constituting the trading server 10 will be described with reference to FIG. FIG. 7 is a block diagram showing an example of the configuration of the trading server 10 (each server constituting the trading server 10) used in the securities trading system shown in FIG.

  As shown in FIG. 7, each server includes a CPU 101, a main memory 102, a user interface (I / F) 103, a communication interface (I / F) 104, an external memory 105, and a disk drive 106. These components are electrically connected to each other via a bus 107.

The CPU 101 loads an operating system, a program for realizing various functions, and the like from the external memory 105 into the main memory 102, and executes instructions included in the loaded program. The main memory 102 is used for storing a program executed by the CPU 101, and is constituted by a DRAM, for example.
The CPU 101 mounted on the calculation server 14 executes various processes and calculations based on information received from each of the web server 14 and the database server 16. The CPU 101 mounted on the web server 14 generates HTML data for displaying a web page using various information received from the calculation server 12 and the database server 16 in accordance with the information received from the terminal device 30. To do.

The user I / F 103 includes, for example, an information input device such as a keyboard and a mouse that receives an operator's input, and an information output device such as a liquid crystal display that outputs a calculation result of the CPU 101. The communication I / F 104 is implemented as hardware, firmware, communication software such as a TCP / IP driver or a PPP driver, or a combination thereof.
Note that the calculation server 12, the web server 14, the database server 16, and the securities server 18 are communicably connected to other servers using the communication I / F 104. Further, the web server 14 is configured to be able to communicate with the terminal device 30 via the communication network 20 using the communication I / F 104.

  The external memory 105 is composed of, for example, a magnetic disk drive, and stores various programs such as programs for realizing various functions. The external memory 105 can also store various data used in these programs.

The disk drive 106 reads data stored in various storage media such as a CD-ROM, a DVD-ROM, and a DVD-R, or writes data to these storage media.
In the above, the structure which the calculation server 12, the web server 14, the database server 16, and the securities server 18 which comprise the buying and selling server 10 have in common was demonstrated.

Here, paying attention to the web server 14 having such a configuration, the web server 14 is a web server that manages a website composed of a plurality of web pages having a hierarchical structure. Trading services can be provided. The browser software provided in the terminal device 30 acquires HTML data for displaying the web page from the web server 14, analyzes the acquired HTML data, and presents the web page to the user of the terminal device 30. Can do. HTML data for displaying the web page can also be stored in the external memory 105. The HTML data includes an HTML document described in a markup language such as HTML, and various images can be associated with the HTML document using tags. A program written in a script language such as ActionScript or Javascript (registered trademark) can be embedded in the HTML document.
In this way, the web server 14 manages the website that provides the securities trading service, and distributes the web pages constituting the website in response to a request from the terminal device 30, thereby allowing the user to buy / sell securities. Service can be provided.

1-3. The terminal device 30 of the terminal device 30 is an arbitrary information processing device capable of displaying a web page of a website acquired from the trading server 10 on a web browser in one embodiment, for example, a mobile phone, Including but not limited to smartphones, personal computers and touchpads.

  The configuration of the terminal device 30 will be described with reference to FIG. FIG. 8 is a block diagram showing an example of the configuration of the terminal device 30 used in the securities trading system 1 shown in FIG. As shown in FIG. 3, the terminal device 30 includes a CPU 31, a main memory 32, a user interface (I / F) 33, a communication interface (I / F) 34, and an external memory 35. The components are electrically connected to each other via a bus 36.

  The CPU 31 loads various programs such as an operating system from the external memory 35 to the main memory 32 and executes instructions included in the loaded program. The main memory 32 is used for storing a program executed by the CPU 31, and is constituted by, for example, a DRAM.

The user I / F 33 includes, for example, an information input device such as a touch panel that accepts user input, a keyboard, buttons, and a mouse, and an information output device such as a liquid crystal display that outputs a calculation result of the CPU 31. The communication I / F 34 is implemented as hardware, firmware, communication software such as a TCP / IP driver or a PPP driver, or a combination thereof, and is configured to be able to communicate with the server device 10 via the communication network 20.
The external memory 35 is configured by, for example, a magnetic disk drive, a flash memory, or the like, and stores various programs such as an operating system.

  The terminal device 30 having such a configuration includes, for example, browser software for interpreting an HTML format file (HTML data) and displaying the screen, and the HTML acquired from the trading server 10 by the function of the browser software. The data can be interpreted to display a web page corresponding to the received HTML data. Further, the terminal device 30 includes plug-in software (for example, FLASH Player provided by Adobe Systems) (FLASH is a trademark) incorporated in browser software, and a SWF format file embedded in HTML data is provided. The SWF format file obtained from the trading server 10 can be executed using browser software and plug-in software.

  When the terminal device 30 interprets an HTML format file (HTML data), for example, an animation or an operation icon specified in the file is displayed on the screen of the terminal device 30. The user can input an instruction to advance the securities trading service using an input interface (for example, a touch screen or a button) of the terminal device 30. The instruction input from the user is transmitted to the trading server 10 through a platform function such as a browser of the terminal device 30.

1-4. Function of Trading Server 10 FIG. 9 is a block diagram showing an example of the function of the trading server 10 used in the securities trading system 1 shown in FIG. As shown in FIG. 9, the trading server 10 mainly includes a storage unit 110, an input unit 120, a calculation unit 130, and a trading processing unit 140.

  The storage unit 110 holds each user in association with each of a plurality of brands held in an account opened by the user at a certain financial institution (here, “WN company” which is a financial product trader). Various information including quantity, market price unit price, evaluation value (market capitalization), current ratio, target allocation amount, deviation from target, and the like can be stored. Financial institutions include deposit handling financial institutions (banks, credit unions, credit agricultural cooperative associations, etc.), financial product traders, and insurance companies. Furthermore, financial institutions include financial institutions defined by laws of other countries.

  The input unit 120 inputs an investment amount newly invested to purchase one of the brands from each user (from the terminal device 30) via the communication network 20. Instead of this, or in addition to this, the input unit 120 has a contract for accumulating a predetermined amount every certain period (for example, any period such as daily, weekly, monthly, quarterly, semiannual, yearly, etc.). For users who are present, a reserve amount (which is also a kind of investment amount) can be input from, for example, the storage unit 110 (the storage unit can store the amount and period in association with such a user). .

Regarding the rebalancing process, the calculation unit 130 determines a purchase target brand and / or a sale target brand for each user, and determines how many purchase target brands (or sale target brands) to purchase (or sell). be able to.
In addition, regarding the additional investment, the calculation unit 130 calculates, for each user, the market capitalization of each brand and the market capitalization of the entire brand based on the quantity and market price of each brand held in the account opened by the user at WN. Calculate the hypothetical ratio that is the ratio of the market capitalization of each issue to the total market capitalization, which is the sum of the investment amount and the market capitalization of the entire issue, and purchase based on the difference between the virtual ratio of each issue and the target ratio Determine the target brand. Furthermore, the calculation unit 130 calculates the amount of money to be allocated for the purchase of the purchase target brand determined in this way.

The sale processing unit 140 executes purchase processing (or sale processing for sale) for purchasing the purchase target brand (or sale target brand) determined by the calculation unit 130 for each user regarding the rebalancing process.
Further, the buying and selling processing unit 140 executes a purchase process for purchasing the purchase target brand determined by the calculation unit 130 for each user with respect to the additional investment.

  Each function which such a buying and selling server 10 has can be realized by using, for example, the configuration shown in FIG.

1-5. Operation of Securities Trading System 1 An example of an operation performed to provide a securities trading service in the securities trading system 1 having the above configuration will be described.
First, an outline of operations performed in the securities trading system 1 will be briefly described with reference to FIG. FIG. 10 is a flowchart showing an example of operations performed in the securities trading system 1 shown in FIG. Note that the user (here, “User A”) uses the terminal device 30 to access a predetermined site for providing the securities trading service provided by the web server 14 of the trading server 10. It is assumed that the buying and selling server 10 has already provided a portfolio constructed by a plurality of brands to the user A by inputting such information.

First, in step (hereinafter referred to as “ST”) 40, the trading server 10 (the calculation server 12) executes a rebalancing process on the portfolio of the user A as necessary. As a result, the user's portfolio shifts to an appropriate state. Note that this rebalancing process may be executed only when, for example, the percentage of the assets of any brand is different from the percentage set for this brand. And / or may be executed every predetermined cycle (for example, any cycle such as one week, two weeks, one month, three months, six months, etc.) and / or It may be executed at the time of receiving a predetermined signal (such as a signal for instructing the trading server 10 to execute the rebalance process) from the terminal device 30 of the former and / or the trading server. 10 (which may be any one of the calculation server 12, the web server 14, the database server 16 and the securities server 18) via the user interface (I / F) 103. When a predetermined signal input by an operator operating the bar 10 is detected by the CPU 101 of the trading server 10 (for example, the operator clicks on a predetermined icon or the like to perform a rebalance process on the user A) Or when predetermined information is input from the keyboard).
A specific example of calculation logic for realizing this rebalance processing will be described later.

  In ST41, when the market price / unit price of at least one brand that constructs the user A's portfolio fluctuates, the portfolio shifts to an inappropriate state.

  In ST42, the buying / selling server 10 (the calculation server 12) newly invests in the portfolio of the user A from the terminal device 30 of the user A via the predetermined website provided by the web server 14. Enter. Instead of this, or in addition to this, the trading server 10 may have a fixed period (for example, every day, every week, every month, every quarter, every six months, every year, etc.) between the company WN and the user A as described above. ), When a contract is made to accumulate a predetermined amount every time, an accumulated amount (a kind of investment amount) stored in the storage unit 120 of the trading server 10 may be input.

  In ST43, the buying / selling server 10 (the calculation server 12) determines the purchase target brand based on the information related to the portfolio of the user A and the input investment amount. A specific example of calculation logic for determining the brand to be purchased will be described later.

  In ST44, the trading server 10 (the calculation server 12) determines the quantity to be purchased for the brand to be purchased based on the information about the portfolio of the user A and the input investment amount. A specific example of calculation logic for determining the quantity to be purchased for the brand to be purchased will be described later.

  In ST45, the buying / selling server 10 (the calculation server 12) executes a purchase process of purchasing the purchase target brands determined in ST43 by the quantity determined in ST44. As a result, the user's portfolio is returned to the proper state (or approaches the proper state). A specific example of the process for realizing the purchase process will be described later.

1-6. Calculation logic for realizing the rebalance process (ST40)
A specific example of calculation logic for realizing the rebalancing process executed in ST40 will be described.

(Configuration)
The following data is used for each user (market price unit price is common to all users).
Stock ID i (i∈I, I = {1, 2,..., N})
Quantity held Qi ( > 0)
Market unit price Vi ( > 0)
Target distribution ratio Ri

(Method of calculation)
The calculation unit 130 of the trading server 10 (the calculation server 12) executes the following steps for each user.
Step 1
The calculation unit 130 calculates the market capitalization (TA) of the entire brand of the user and the ratio (CRi) of the market capitalization of each brand to the market capitalization (TA) of the whole brand according to the following formula. A deviation (Di) between the ratio (CRi) and the target distribution ratio is calculated.

Step 2
The calculation unit 130 calculates the trading amount IAi and the trading quantity IQi of each brand. However, these values shall mean purchase if positive and sale if negative. When Di is positive, IAi and IQi are negative, so if you sell stocks that exceed the target allocation ratio and Di is negative, IAi and IQi are positive. You will purchase stocks that do not meet the allocation ratio.
IAi = −TA × Di
IQi = IAi ÷ Vi
A specific example of a purchase process for purchasing a brand and a sale process for selling a brand will be described later.
1-7. Calculation logic (ST43) for determining the brand to be purchased and calculation logic (ST44) for determining the quantity to purchase the brand to be purchased (part 1)
A specific example of calculation logic for determining a purchase target brand in ST43 and calculation logic for determining a quantity to be purchased in ST44 will be described.

追加投資額 Ａ（＞０） (Configuration)
The following data is used for each user (market price unit price is common to all users).
Stock ID i (i∈I, I = {1, 2,..., N})
Quantity held Qi ( > 0)
Market unit price Vi ( > 0)
Target distribution ratio Ri

Additional investment A (> 0)

(Method of calculation)
The calculation unit 130 of the trading server 10 (the calculation server 12) executes the following steps for each user.

Step 1
In accordance with the following formula, the calculation unit 130 calculates the total market capitalization of the user after the additional investment (TA = investment amount + the market capitalization of the entire brand) and the current market price of each brand with respect to the total market capitalization after the additional investment. The ratio (CRi) of the total amount is calculated, and further, the difference (Di) between the ratio (CRi) and the target distribution ratio is calculated.

Step 2
When Di is rearranged in order of increasing value, the ID of the j-th brand is _ij .
Di ₁ ≦ Di ₂ ≦. . . ≦ Di _n
Here, r = 1, 2,. . . , N, C _r is defined as follows, and C ₀ = 0. However, _{Di n + 1} is either larger of 0 or Di _n.

この不等式を満たす自然数ｒ（≦ｎ）が必ず存在することは以下のとおり示される。よって、算出部１３０は、ｒを１からｎまで１つずつ増やしながら、Ｃ_ｒがＡ／ＴＡと一致又はＡ／ＴＡを超えたかをチェックすることにより、ｒを必ず見つけることができる。このようにｒを見つけることができるということは、購入対象銘柄として、銘柄ｉ_１、ｉ_２、．．．ｉ_ｒのｒ個の銘柄を見つけることができる、ということを意味する。 The calculation unit 130 obtains a natural number r (≦ n) that satisfies the following relationship.

The existence of a natural number r (≦ n) that satisfies this inequality is shown as follows. Therefore, calculation unit 130, while increasing the r from 1, one to n, _{C r} is by checking whether more than a match or A / TA with A / TA, it is possible to find r sure. The fact that r can be found in this way means that the brands i ₁ , i ₂ ,. . . This means that r brands of i _r can be found.

First, if j <k, then Di _j ≦ Dj _k , so that it is understood that C _r−1 ≦ C _r as follows.

Further, it can be seen that A / TA> 0 and that 0 = C ₀ <A / TA ≦ C _n according to the following equation.

From these, A / TA enters somewhere in the section (C ₀ , C ₁ ], (C ₁ , C ₂ ],..., (C _n−1 , C _n ]), that is, C it is seen _{that r-1 <a / TA ≦} C r is a natural number satisfying the r (≦ n) is present.

  The process executed in steps 1 and 2 is a specific example of the process executed in ST43.

Step 3
The calculation unit 130 obtains a set of brand IDs B = {i ₁ ,. . . , I _r }, the investment amount IAi _j and trading quantity IQi _j for each brand are calculated as follows.

It should be noted that, as of the next, it can be confirmed that the A and summed up for all of the subject securities the IAi _j.

  The process executed in step 3 is a specific example of the process executed in ST44.

Next, the processing executed in steps 1 to 3 will be described using specific numerical values.
The target distribution ratio of brands a to e and the evaluation value (Q × V) before additional investment are as shown in FIG. 11, and the additional investment (A) is assumed to be 240,000 yen.

Step 1
Using the fact that total market capitalization (TA) = 24 + 93 + 75 + 36 + 51 + 21 = 300 (10,000 yen), calculation unit 130 calculates CR and D as shown in the fourth and fifth columns of FIG. 11, respectively.

Step 2
The calculation unit 130 sorts in the order of Di, and sets i ₁ = b, i ₂ = a, i ₃ = c, i ₄ = e, and i ₅ = d. A diagram illustrating the size of these Di is shown in FIG. FIG. 12 shows how much each brand deviates from the target allocation ratio when no additional investment is made for the brand.

Because of the additional ratio of investment (A) (A / TA) is 8% of the total market capitalization (TA), calculation section 130 sequentially calculated from _{C 1,} obtaining the first time more than _{C r} a A / TA .
C ₁ = (Di ₂ -Di ₁ ) = 1%
_{C 2 = (Di 3 -Di 1} ) + (Di 3 -Di 2) = 2% + 1% = 3%
_{C 3 = (Di 4 -Di 1} ) + (Di 4 -Di 2) + (Di 4 -Di 3) = 4% + 3% + 2% = 9%

Since C ₂ <A / TA ≦ C ₃ , the calculation unit 130 can obtain r = 3. That is, the calculation unit 130 can determine three brands i ₁ , i ₂ , and i ₃ as the brands to be purchased.
More conceptually, as shown in FIG. 12, first, whether or not the portion P1 (C ₁ = 1%) (the portion surrounded by the solid line in FIG. 12) can cover A / TA (= 8%). consider. Since the portion P1 cannot cover A / TA (C ₁ <A / TA), attention is now focused on the portion P2. Consider whether the portion P2 (C ₂ = 2% + 1%) (two portions surrounded by a broken line in FIG. 12) can cover A / TA (= 8%). Since the part P2 cannot cover A / TA (C ₂ <A / TA), attention is now focused on the part P3. It is examined whether the portion P3 (C ₃ = 4% + 3% + 2%) (three portions surrounded by a dotted line in FIG. 12) can cover A / TA (= 8%). The portion P3 can cover A / TA and exceeds A / TA for the first time. Accordingly, since C ₂ <A / TA ≦ C ₃ is established (r = 3), the three brands i ₁ , i ₂ , and i ₃ can be determined as purchase brands.

Step 3
The calculation unit 130 calculates the distribution of the investment amount for each of the three brands determined as purchase target brands in Step 2 above.
IAi ₁ = 300 × (2% + 1/3 × (8% − (2% + 1%))) = 110,000 Yen IAi ₂ = 300 × (1% + 1/3 × (8% − (2% + 1%)) )) = 80,000 yen IAi ₃ = 300 × (0% + 1/3 × (8% − (2% + 1%))) = 50,000 yen FIG. 13 conceptually shows such an allocation. It is shown.
As is clear from FIG. 13, the calculation unit 130 preferentially determines a stock having a large negative range from the target allocation ratio as a purchase target stock and allocates the investment amount to the purchase target stock. Later, the allocation of the investment amount to each purchase target stock is determined so that the difference between the target market share ratio and the ratio of the market capitalization of each purchase target stock to the total market capitalization is approximately equal for all the purchase target stocks. It can be said that. As described above, at least one stock having the largest difference between the market capitalization ratio to the total market capitalization and the target distribution ratio among a plurality of stocks is selected as the stock to be purchased, and the investment amount is selected for the stock to be purchased thus selected. As a result, after additional investment, stocks with a large (or significantly large) difference between the market capitalization ratio of all stocks and the target allocation ratio remain (at least partially). Can be suppressed). In addition, even if there are multiple stocks that have a difference between the market capitalization and the target allocation ratio for all stocks after the additional investment, the multiple stocks that remain are It is possible to increase the possibility that the difference between the ratio of the market capitalization to the market capitalization of the brand and the target allocation ratio is equal to or close to that of other brands.

1-8. Calculation logic (ST43) for determining the brand to be purchased and calculation logic (ST44) for determining the quantity to purchase the brand to be purchased (part 2)
Next, another specific example of the calculation logic for determining the purchase target brand in ST43 and the calculation logic for determining the quantity for purchasing the purchase target brand in ST44 will be described in the above "1-7". Only the points that differ from the above will be described.
The preconditions and step 1 are the same as those described in “1-7” above.

Step 2
The calculation unit 130 determines all brands for which Di is negative as purchase candidate brands.
The process executed in steps 1 and 2 is a specific example of the process executed in ST43.

Step 3
The calculation part 130 calculates the sum of the absolute value of Di of only the brands included in M, where M is a set of brand IDs for which Di is negative, as in the following equation.

Next, the calculation unit 130 calculates the investment amount IAi and the buying and selling quantity IQi for each brand as shown in the following formula for all brands included in M.

  The process executed in step 3 is a specific example of the process executed in ST44.

  As mentioned above, among the multiple stocks, stocks whose market capitalization ratio to the total market capitalization is smaller than the target ratio are all determined as purchase subject stocks, and the ratio of each stock subject to purchase thus determined. The investment amount proportional to the difference between the target ratio and the target ratio (absolute value) is allocated to the purchase of the target issue. Therefore, after additional investment, it is possible to suppress (at least partially) a situation in which stocks with a large (or significantly large) difference between the market capitalization ratio of all stocks and the target allocation ratio still remain. . In addition, even if there are multiple stocks that have a difference between the market capitalization and the target allocation ratio for all stocks after the additional investment, the multiple stocks that remain are It is possible to increase the possibility that the difference between the ratio of the market capitalization to the market capitalization of the brand and the target allocation ratio is equal to or close to that of other brands.

1-9. Specific Example of Purchase Process and Sales Process The purchase process performed in ST40 and ST45 described above and the sale process performed in ST40 described above will be specifically described with reference to FIG.

  Here, after the buying and selling processing unit 140 of the buying and selling server 10 (the calculation server 12) executes purchase processing for purchasing 200 pieces of the brand A for the user A specified by the customer ID “0001”, the quantity of the brand F is determined. Consider a case in which a sale process for selling 100 is executed. When such purchase processing and sale processing are executed, the trade processing unit 140 can store information illustrated in FIG. 14 as transaction information in the database server 16.

  In FIG. 14, in the first line, “User A” identified by the customer ID “0001” purchases a quantity of 200 brands A from WN company to 20,000 yen (200 × 100 yen). ) Is recorded, and in the second line, “User A” also pays 5,000 yen (100 × 50) from WN company by selling 100 quantity of brand F to WN company. Information that it was received is recorded.

2. A securities trading system according to another embodiment A securities trading system according to another embodiment is described by focusing only on differences from the securities trading system according to the embodiment described in “1” above. To do.
When the user A's portfolio is in an inappropriate state, the user A may sell an asset (at least one issue included in the portfolio) that constructs the portfolio. In such an aspect, the securities trading system according to the present embodiment determines the securities to be sold so that the portfolio is in an appropriate state (or approaches the appropriate state) without performing a separate rebalancing process. The process of selling is executed.

First, the characteristics of the securities trading system according to this embodiment will be briefly described with reference to FIGS. 15 and 16 in addition to FIG.
FIG. 15 shows an example of how a portfolio that was in an inappropriate state constructed in a securities trading system according to another embodiment of the present invention changes due to partial sale according to a normal method. FIG. FIG. 16 shows an example of how a portfolio that was in an inappropriate state constructed in a securities trading system according to another embodiment of the present invention changes due to partial sale according to a special method. FIG.

  When the portfolio is in an inappropriate state as shown in FIG. 2, an aspect in which the user A sells at least one issue included in the portfolio according to a normal method will be described with reference to FIG. 15. Here, when the portfolio is in the inappropriate state shown in FIG. 2 (the market capitalization of the entire brand is 48,000 yen), for example, an asset corresponding to 24,000 yen is sold. In the ordinary method, 50% of the market capitalization of all the brands is partially sold, so 50% of the quantity of the brands is sold for each of the brands A to C. That is, since the quantity of the brand A and the brand B is 200, respectively, the brand A and the brand B are sold in quantity 100, and the quantity of the brand C is 500, so the brand C is sold in quantity 250. As a result, as shown in FIG. 15, the quantities of the brands A to C are 100, 100, and 250, respectively, and the ratios of the brands A to C are 41.67%, 16.67%, and 41.67%, respectively. It is still different from the target ratio. In addition, the market capitalization of the brands A to C as a whole is 24,000 yen (48,000 yen-24,000 yen).

  In the same situation as described above, a case where a partial sale is performed according to a special technique will be described with reference to FIG. Here again, it is assumed that an asset corresponding to, for example, 24,000 yen is sold when the portfolio is in an inappropriate state as shown in FIG. According to a special method, the sale price of 24,000 yen is at least one issue of issues A to C so that the ratio of each issue after such sale is substantially the same as the target ratio. Distributed to. For example, as shown in FIG. 16, the brands A to C are sold in quantity 80, quantity 50, and quantity 350, respectively. Accordingly, the quantities of the brands A to C are 120, 150, and 150, respectively, and the ratios of the brands A to C are 50%, 25%, and 25%, respectively, which are the same as the target ratio. The market capitalization of the entire brands A to C is 24,000 yen (= 48,000 yen-24,000 yen) as in the case of using a normal method (FIG. 15). In this way, according to the special method, the rebalancing process is executed at the same time as the partial sale of assets, without executing a separate rebalancing process (while suppressing the fees associated with the rebalancing process). can do.

2-1. Functions of Trading Server 10 The functions of the trading server 10 will be described by paying attention only to points different from those described in “1-4” above.

  The input unit 120 uses the communication network 20 to sell the sale amount of the entire brand to be sold to sell at least one brand to be sold among a plurality of brands held by each user (terminal device 30 of each user). Enter from.

  For the partial sale, the calculation unit 130 calculates, for each user, the market capitalization of each brand and the market capitalization of the entire brand based on the quantity and market price of each brand held in the account opened by the user at WN. Calculate the virtual ratio (second hypothetical ratio), which is the ratio of the market capitalization of each brand to the total market capitalization (second total market capitalization) obtained by subtracting the sale price from the market capitalization of the entire brand, and the virtual ratio of each brand The stock to be sold is determined based on the difference between the target ratio and the target ratio. Furthermore, the calculation unit 130 calculates the amount to be allocated for the sale of the sale target brand determined in this way.

  The sale processing unit 140 executes a sale process of selling the sale target brand determined by the calculation unit 130 for each user with respect to partial sale.

  Each function which such a buying and selling server 10 has can be realized by using, for example, the configuration shown in FIG.

2-2. Operation of Securities Trading System 1 An example of an operation performed to provide a securities trading service in the securities trading system 1 having the above configuration will be described.
First, the outline of the operation performed in the securities trading system 1 will be briefly described with reference to FIG. 17 while focusing only on the points different from those described in the above “1-5”. FIG. 17 is a flowchart showing an example of operations performed in the securities trading system according to another embodiment of the present invention.

  In ST52, the buying / selling server 10 (the calculation server 12) sends the amount of assets to be sold from the user A's terminal device 30 via the predetermined website provided by the web server 14 (the amount sold). ).

  In ST53, the buying / selling server 10 (the calculation server 12) determines the sale target brand based on the information about the portfolio of the user A and the inputted sale price. A specific example of calculation logic for determining the brand to be sold will be described later.

  In ST54, the trading server 10 (the calculation server 12) determines the quantity to be sold of the brand to be sold based on the information related to the user A's portfolio and the input sale price. A specific example of calculation logic for determining the quantity to be sold for the brand to be sold will be described later.

  In ST55, the buying / selling server 10 (the calculation server 12) executes a selling process for selling the purchase target brand determined in ST53 by the quantity determined in ST54. As a result, the user's portfolio is returned to the proper state (or approaches the proper state). A specific example for realizing the sale process is as described in “1-9” above.

2-3. Calculation logic (ST53) for determining the brand to be sold and calculation logic (ST54) for determining the quantity to sell the brand to be sold (part 1)
A specific example of calculation logic for determining a sale target brand in ST53 and calculation logic for determining a quantity to be sold in ST54 will be described.

一部売却額 Ａ（＞０） (Configuration)
The following data is used for each user (market price unit price is common to all users).
Stock ID i (i∈I, I = {1, 2,..., N})
Quantity held Qi ( > 0)
Market unit price Vi ( > 0)
Target distribution ratio Ri

Partial sale amount A (> 0)

(Method of calculation)
The calculation unit 130 of the trading server 10 (the calculation server 12) executes the following steps for each user.

Step 1
In accordance with the following formula, the calculation unit 130 calculates the total market capitalization after the partial sale of the user (TA = market capitalization of the entire brand−sales amount) and each current brand with respect to the total market capitalization after the partial sale. The market capitalization ratio (CRi) is calculated, and the difference (Di) between the ratio (CRi) and the target distribution ratio is calculated.

Step 2
When Di is rearranged in descending order, the ID of the j-th brand is _ij .
Di ₁ > Di ₂ > . . . > Di _n
Here, r = 1, 2,. . . , N, C _r is defined as follows, and C ₀ = 0. However, _{Di n + 1} is the smaller one of the 0 or Di _n.

この不等式を満たす自然数ｒ（≦ｎ）が必ず存在することは以下のとおり示される。よって、算出部１３０は、ｒを１からｎまで１つずつ増やしながら、Ｃ_ｒがＡ／ＴＡと一致又はＡ／ＴＡを超えたかをチェックすることにより、ｒを必ず見つけることができる。このようにｒを見つけることができるということは、売却対象銘柄として、銘柄ｉ_１、ｉ_２、．．．ｉ_ｒのｒ個の銘柄を見つけることができる、ということを意味する。 The calculation unit 130 obtains a natural number r (≦ n) that satisfies the following relationship.

The existence of a natural number r (≦ n) that satisfies this inequality is shown as follows. Therefore, calculation unit 130, while increasing the r from 1, one to n, _{C r} is by checking whether more than a match or A / TA with A / TA, it is possible to find r sure. The fact that r can be found in this way means that the issues i ₁ , i ₂ ,. . . This means that r brands of i _r can be found.

First, if j <k, then Di _j > Dj _k , so that it is understood that C _r-1 ≦ C _r as follows.

Further, it can be seen that A / TA> 0 and that 0 = C ₀ <A / TA ≦ C _n according to the following equation.

From these, A / TA enters somewhere in the section (C ₀ , C ₁ ], (C ₁ , C ₂ ],..., (C _n−1 , C _n ]), that is, C it is seen _{that r-1 <a / TA ≦} C r is a natural number satisfying the r (≦ n) is present.

  The process executed in steps 1 and 2 is a specific example of the process executed in ST53.

Step 3
The calculation unit 130 obtains a set of brand IDs B = {i ₁ ,. . . , I _r }, the sales amount IAi _j and the trading quantity IQi _j of each brand are calculated as follows.

It should be noted that, as of the next, it can be confirmed that the A and summed up for all of the subject securities the IAi _j.

  The process executed in step 3 is a specific example of the process executed in ST54.

  As is clear from FIG. 18, the calculation unit 130 preferentially determines a stock having a large positive margin from the target allocation ratio as a stock subject to sale and distributes the sale amount to the stock subject to sale. Regarding the amount sold for each sold issue so that the difference between the target market share and the ratio of the market capitalization of each sold target to the total market capitalized after (partially sold) is approximately the same for all the sold issues It can be said that the distribution of In this way, at least one issue with the largest difference between the market capitalization ratio and the target distribution ratio among all issues is selected as the issue issue for sale, and the sale issue issue selected in this way is selected. Since the sale amount is allocated, as a result, after the partial sale, the issue that the difference between the market capitalization ratio of the total market capitalization and the target allocation ratio is still large (or at least significantly) remains (at least (Partially) can be suppressed. Furthermore, even if there are multiple stocks that have a difference between the market capitalization ratio and the target allocation ratio after the partial sale, the multiple stocks that remain However, it is possible to increase the possibility that the difference between the market capitalization ratio with respect to the market capitalization of all brands and the target allocation ratio is equal or close to that of other brands.

2-4. Calculation logic (ST53) for determining the brand to be sold and calculation logic (ST54) for determining the quantity to be sold for the brand to be sold (part 2)
Next, another specific example of the calculation logic for determining the purchase target brand in ST53 and the calculation logic for determining the quantity to purchase the purchase target brand in ST54 will be described in the above “2-3”. Only the points that differ from the above will be described.
The preconditions and step 1 are the same as those described in “2-3” above.

Step 2
The calculation unit 130 determines all the brands for which Di is positive as the sale candidate brands.
The process executed in steps 1 and 2 is a specific example of the process executed in ST53.

Step 3
The calculation unit 130 calculates the sum of the absolute values of Di for only the brands included in M, where M is a set of brand IDs for which Di is positive as shown in the following equation.

Next, the calculation unit 130 calculates the investment amount IAi and the buying and selling quantity IQi for each brand as shown in the following formula for all brands included in M.

  The process executed in step 3 is a specific example of the process executed in ST54.

  As mentioned above, among the multiple stocks, stocks whose market capitalization ratio to the total market capitalization is larger than the target ratio are all determined as stocks to be sold, and the ratio of each stock subject to sale thus determined The amount of sale proportional to the difference between the target ratio and the target ratio (absolute value) is allocated to the sale of the issue stock. Therefore, it is possible to suppress (at least partially) a situation in which stocks with a large (or significantly large) difference between the market capitalization ratio to the total market capitalization and the target allocation ratio still remain after partial sale. it can. Furthermore, even after multiple sales, even if there are multiple stocks that have a difference between the market capitalization and the target allocation ratio for all stocks, the multiple stocks that remain The possibility that the difference between the ratio of the market capitalization to the market capitalization of all the brands and the target allocation ratio becomes equal or close to that of other brands can be increased.

2-5. Calculation logic (ST53) for determining the brand to be sold and calculation logic (ST54) for determining the quantity to be sold for the brand to be sold (part 3)
If there is a brand whose target distribution ratio Ri is 0% and the number Qi of the brand is positive, all such brands are sold. When the total of the valuation amounts Qi x Vi of such brands partially exceeds the sale amount A, the other brands are not sold, and the valuation amount Qi x Vi of such brands is less than A The calculation logic described in the above “2-3” or “2-4” can be applied to the shortage amount A.

3. In the above embodiment, regarding the additional investment and the partial sale, the calculation unit 130 of the trading server 10 (the calculation server 12) calculates the buying and selling brand and the trading quantity of the selling brand according to various calculation logics. explained. However, the calculation unit 130 does not necessarily use the trading quantity calculated according to various calculation logics as it is (may be used as it is), and may use a quantity approximate to the trading quantity calculated as such. Such approximate quantities can be obtained, for example, by increasing or decreasing the calculated trading volume by a predetermined amount and / or by rounding, rounding up or down the calculated trading volume to a predetermined place. It can be done.

In the above-described embodiment, the case has been described in which at least one of the multiple brands included in the user's portfolio is selected as the purchase target brand for the additional investment. However, in another embodiment, after selecting at least one issue from among a plurality of issues included in the user's portfolio as a purchase issue issue, at least a part (all of the at least one issue) is selected. It is also possible to determine a brand (substitute brand) to be substituted for that brand as a final purchase target brand. In order to realize this, the database server 16 stores at least one alternative brand of the brand in association with each brand, and the calculation unit 130 of the trading server 10 (the calculation server 12) stores the database server 16 in the database server 16. You may make it search and obtain an alternative brand. The alternative brand may preferably be determined such that the properties of the user's portfolio do not change significantly when the alternative brand is purchased. For example, the alternative brand may be a brand whose price movement approximates, such as being linked to the same stock price index as the corresponding brand.
In this case, the investment amount and trading volume of the alternative brand can be calculated as follows.
First, when the calculation logic described in the above “1-7” is used, IAi _j calculated by the formula shown in Step 3 is used as it is as the investment amount of the alternative brand (the brand ID is i ′ _j ). Can be. The trading quantity IQi ′ _j of this alternative brand can be calculated by using the market price unit price Vi ′ _j in place of the market price unit price Vi _j in the formula shown in step 3.
Next, when the calculation logic described in the above “1-8” is used, IAi calculated by the formula shown in step 3 can be used as it is as the investment amount of the alternative brand (brand ID is i). . The trading quantity IQi ′ of the alternative brand can be calculated by using the market price unit price Vi ′ in place of the market price unit price Vi in the formula shown in step 3.
The market price unit price (Vi ′ _j , Vi ′) of the alternative brand can be stored in the database server 16 in association with the alternative brand.

  In the said embodiment, the form which receives provision of securities trading service from the trading server 10 when a user's terminal device 30 accesses the web server 14 of the trading server 10 was demonstrated. However, a function equivalent to that performed by each of the calculation server 12, the database server 16, and the securities server 18 included in the buying and selling server 10 by the user's terminal device 30 executing, for example, a predetermined application program installed therein. It is also possible to adopt a configuration configured to execute Thereby, the user can receive provision of the securities trading service without accessing the trading server 10 by using only the terminal device 30. In this case, the terminal device 30 needs to have a function equivalent to that illustrated in FIG. 9 (the storage unit 110, the input unit 120, the calculation unit 130, and the buying and selling processing unit 140).

  The additional investment function having the rebalance function according to the above-described embodiment and the partial sale function having the rebalance function may be executed only by any one of the functions, Both functions may be executed in combination.

  This is because even if the additional investment or partial sale disclosed in this specification is executed when the portfolio is in an inappropriate state, the investment amount or the sale amount is not sufficiently large in relation to the state of the portfolio. Thus, although the portfolio may not return to full or substantially proper status, the portfolio that was in the improper status can be at least partially brought close to the correct status. Therefore, it should be understood that the aspect of performing the additional investment or partial sale disclosed in this specification uses the technical idea disclosed in this specification, although the difference in effect is large or small. is there.

  The processes and procedures described in the present specification can be realized not only by those explicitly described in the embodiment but also by software, hardware, or a combination thereof. Specifically, the processes and procedures described in this specification are realized by mounting logic corresponding to the processes on a medium such as an integrated circuit, a volatile memory, a nonvolatile memory, a magnetic disk, or an optical storage. Is done. Further, the processes and procedures described in this specification can be implemented as a computer program and executed by various computers.

  Even though the processes and procedures described herein are described as being performed by a single device, software, component, or module, such processes or procedures may include multiple devices, multiple software, It may be executed by multiple components and / or multiple modules. Further, even if it is described that the data, table, or database described in this specification is stored in a single memory, such data, table, or database may be stored in a single device. Or a plurality of memories arranged in a distributed manner in a plurality of devices. Further, the software and hardware elements described herein may be realized by integrating them into fewer components or by disassembling them into more components.

DESCRIPTION OF SYMBOLS 10 Trading server 20 Communication network 30 Terminal device 110 Storage part 120 Input part 130 Calculation part 140 Trading process part

Claims (13)

A server device used for buying and selling securities,
Storage means for storing at least a quantity, a market price unit price, and a target ratio in association with each of a plurality of brands held in an account opened by a predetermined user at a financial institution;
An input means for entering the amount of investment newly invested to purchase one of the stocks,
Based on the quantity and the market price of each brand, calculate the market capitalization of each brand and the market capitalization of all the multiple brands,
Calculate a hypothetical ratio that is the ratio of the market capitalization of each issue to the total market capitalization, which is the sum of the investment amount and the market capitalization of all of the plurality of issues,
A decision means purchase determining target stocks based on a difference between the target ratio and the virtual ratios of the stock, the difference of each said difference is largest n number of candidate stock in the entire plurality of brands And the sum of the differences of the one comparative stock having the next largest difference between the n candidate stocks in the plurality of stocks is the ratio of the amount of the investment amount to the total market capitalization A determination means for determining, as the purchase target brand, a brand selected from the group including the n candidate brands and a brand that replaces the brand, based on whether the brand price is greater than
A server device comprising: The determination means is configured so that the difference between the target market ratio and the market capitalization ratio of each purchase target brand after the purchase target brand purchase with respect to the total market capitalization is substantially equal in the entire purchase target brand. The server apparatus according to claim 1, wherein an amount of money to be allocated for purchase of a brand is calculated. A server device used for buying and selling securities,
Storage means for storing at least a quantity, a market price unit price, and a target ratio in association with each of a plurality of brands held in an account opened by a predetermined user at a financial institution;
An input means for entering the amount of investment newly invested to purchase one of the stocks,
Based on the quantity and the market price of each brand, calculate the market capitalization of each brand and the market capitalization of all the multiple brands,
Calculate a hypothetical ratio that is the ratio of the market capitalization of each issue to the total market capitalization, which is the sum of the investment amount and the market capitalization of all of the plurality of issues,
A determination means for determining a brand to be purchased based on a difference between the virtual ratio and the target ratio of each brand, the brand including an entire brand whose virtual ratio is smaller than the target ratio and a brand that replaces the brand Determining means for determining a brand selected from a group as the brand to be purchased;
A server device comprising: The determination means calculates an amount to be allocated for purchase of each purchase target brand based on a ratio of the difference of each purchase target brand to a total sum of the differences of the entire purchase target brand. The server apparatus of description. The input means further inputs a sale amount of the entire sale target brand in order to sell at least one sale target brand of the plurality of brands,
The determining means further includes:
Calculating a second hypothetical ratio that is a ratio of the market capitalization of each brand to a second total market capitalization obtained by subtracting the sale price from the market capitalization of the plurality of brands;
Based on a difference between the target ratio and said second imaginary ratio of each stock, to determine the selling target stocks from the plurality of brands, are configured to, any of claims 1 to 4 The server device described in 1. The server device according to claim 5 , wherein the determination unit determines a brand whose second virtual ratio is larger than the target ratio as the brand to be sold. The server device according to claim 6 , wherein the determination unit determines at least one brand having the largest difference among the plurality of brands as the brand to be sold. The determination means is configured so that the difference between the target market ratio and the ratio of the market capitalization of each sale target brand after the sale of the sale target brand to the second total market capitalization is substantially equal in the entire sale target brand. The server device according to claim 7 , wherein the server device calculates an amount of money to sell the brand to be sold. The server device according to claim 6 , wherein the determination unit determines an entire brand having the second virtual ratio larger than the target ratio as the brand to be sold. The server device according to claim 9 , wherein the determination unit calculates an amount of money to sell each sale target brand based on a ratio of the difference of each sale target brand to a total sum of the differences of all the sale target brands. . A computer-implemented method for buying and selling securities,
Storing at least a quantity, a market price unit, and a target ratio in association with each of a plurality of issues held in an account established by a predetermined user at a financial institution;
Entering the amount of new investment to buy one of the stocks,
Calculating the market capitalization of each brand and the market capitalization of the plurality of brands based on the quantity and the market price of each brand;
Calculating a virtual ratio that is a ratio of the market capitalization of each brand to the total market capitalization that is the sum of the investment amount and the market capitalization of the plurality of brands;
Determining a brand to be purchased based on a difference between the virtual ratio and the target ratio of each brand, the difference of each of the n candidate brands having the largest difference among the plurality of brands; The sum of the differences of the one comparative stock having the next largest difference from the n candidate stocks in the plurality of stocks is greater than the ratio of the investment amount to the total market capitalization. Determining, as the purchase target brand, a brand selected from a group including the n candidate brands and a brand that replaces the brand .
A method comprising the steps of: Computer
For buying and selling securities,
Storage means for storing at least a quantity, a market price unit price, and a target ratio in association with each of a plurality of brands held in an account opened by a predetermined user at a financial institution;
An input means for inputting the amount of investment newly invested to purchase one of the stocks, and
Based on the quantity and the market price of each brand, calculate the market capitalization of each brand and the market capitalization of all the multiple brands,
Calculate a hypothetical ratio that is the ratio of the market capitalization of each issue to the total market capitalization, which is the sum of the investment amount and the market capitalization of all of the plurality of issues,
A decision means purchase determining target stocks based on a difference between the target ratio and the virtual ratios of the stock, the difference of each said difference is largest n number of candidate stock in the entire plurality of brands And the sum of the differences of the one comparative stock having the next largest difference between the n candidate stocks in the plurality of stocks is the ratio of the amount of the investment amount to the total market capitalization Determining means for determining, as the purchase target brand, a brand selected from a group including the n candidate brands and a brand that replaces the brand ,
A computer program that functions as a computer program. A terminal device used for buying and selling securities,
Storage means for storing at least a quantity, a market price unit price, and a target ratio in association with each of a plurality of brands held in an account opened by a predetermined user at a financial institution;
An input means for entering the amount of investment newly invested to purchase one of the stocks,
Based on the quantity and the market price of each brand, calculate the market capitalization of each brand and the market capitalization of all the multiple brands,
Calculate a hypothetical ratio that is the ratio of the market capitalization of each issue to the total market capitalization, which is the sum of the investment amount and the market capitalization of all of the plurality of issues,
A decision means purchase determining target stocks based on a difference between the target ratio and the virtual ratios of the stock, the difference of each said difference is largest n number of candidate stock in the entire plurality of brands And the sum of the differences of the one comparative stock having the next largest difference between the n candidate stocks in the plurality of stocks is the ratio of the amount of the investment amount to the total market capitalization A determination means for determining, as the purchase target brand, a brand selected from the group including the n candidate brands and a brand that replaces the brand, based on whether the brand price is greater than
A terminal device comprising:

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