Abstract: A computer-readable recording medium storing a program causes a computer to execute a process that includes: identifying a start point of an acquisition-target period of a stock-trading history of a specific company based on at least one of a trend of a stock price of the company prior to a timing of a specific-information disclosure in the company and a timing of an information disclosure prior to the specific-information disclosure; acquiring the stock-trading history of the company within a period starting from the identified start point; and referring to a memory that stores trend information of a stock price of the company and a timing of information disclosure relating to the company, and selectively acquiring selling or buying transaction information of stocks of the company in accordance with a direction of fluctuations of the stock price of the company after the timing of the specific-information disclosure.