4. A knowledge extracting apparatus for extracting knowledge information related to stock transactions from pieces of distributed news information, comprising: an information receiving section for receiving the pieces of news information; an information selecting section for selecting news information including economic terms from the pieces of news information thus received; a knowledge extracting section for extracting the knowledge information from the news information thus selected; a storage section for storing the knowledge information thus extracted; and an information analysis section for, after the knowledge information is stored, analyzing all the pieces of news information received by the information receiving section, based on the knowledge information stored in the storage section; wherein the knowledge extracting section includes: a share-price-fluctuation evaluation word judging section for judging whether or not the news information thus selected includes a share-price-fluctuation evaluation word to evaluate a share price fluctuation; a group definition word judging section for judging whether or not the news information includes a group definition word to define a group name of an issue when the news information includes the share-price-fluctuation evaluation word as a result of the judgment; a group name extracting section for extracting a group name from the news information based on the group definition word when the news information includes the group definition word as a result of the judgment; an issue extracting section for extracting an issue including a company name and a securities code from the news information when the news information includes the share-price-fluctuation evaluation word as a result of the judgment by the share-price-fluctuation evaluation word judging section; an element extracting section for extracting a share-price-fluctuation element from the news information when the news information includes the share-price-fluctuation evaluation word as a result of the judgment by the share-price-fluctuation evaluation word judging section; a combination forming section for combining the group name, the issue, and the share-price-fluctuation element thus extracted so as to form the knowledge information; and a writing section for writing the knowledge information thus formed into the storage section, wherein the knowledge information is information including the group name, the issue, and the share-price-fluctuation element, or information including first information constituted by the group name and the issue and second information constituted by the share-price-fluctuation element.
4. A knowledge extracting apparatus for extracting knowledge information related to stock transactions from pieces of distributed news information, comprising: an information receiving section for receiving the pieces of news information; an information selecting section for selecting news information including economic terms from the pieces of news information thus received; a knowledge extracting section for extracting the knowledge information from the news information thus selected; a storage section for storing the knowledge information thus extracted; and an information analysis section for, after the knowledge information is stored, analyzing all the pieces of news information received by the information receiving section, based on the knowledge information stored in the storage section; wherein the knowledge extracting section includes: a share-price-fluctuation evaluation word judging section for judging whether or not the news information thus selected includes a share-price-fluctuation evaluation word to evaluate a share price fluctuation; a group definition word judging section for judging whether or not the news information includes a group definition word to define a group name of an issue when the news information includes the share-price-fluctuation evaluation word as a result of the judgment; a group name extracting section for extracting a group name from the news information based on the group definition word when the news information includes the group definition word as a result of the judgment; an issue extracting section for extracting an issue including a company name and a securities code from the news information when the news information includes the share-price-fluctuation evaluation word as a result of the judgment by the share-price-fluctuation evaluation word judging section; an element extracting section for extracting a share-price-fluctuation element from the news information when the news information includes the share-price-fluctuation evaluation word as a result of the judgment by the share-price-fluctuation evaluation word judging section; a combination forming section for combining the group name, the issue, and the share-price-fluctuation element thus extracted so as to form the knowledge information; and a writing section for writing the knowledge information thus formed into the storage section, wherein the knowledge information is information including the group name, the issue, and the share-price-fluctuation element, or information including first information constituted by the group name and the issue and second information constituted by the share-price-fluctuation element. 5. The knowledge extracting apparatus according to claim 4 , wherein: the knowledge extracting section further includes: an element-expression clue word dictionary storage section for storing a clue word to an expression of the share-price-fluctuation element, information indicative of a direction of the share price fluctuation, and information indicative of an intensity of the share price fluctuation in association with each other; and an information giving section for searching the element-expression clue word dictionary based on the share-price-fluctuation element thus extracted and giving respective pieces of searched-out information indicative of a direction and an intensity of the share price fluctuation, to the share-price-fluctuation element.