To provide a stock price trend display system by which a time-series movement of the price trend of a plurality of issues composing the market can be grasped.

A server 10 establishes a constant period from commencement to termination, and sets a plurality of analysis periods by shifting the commencement and the termination sequentially. Based on a stock price DB 141 stored in an HDD 14, the server calculates a stock price trend of each issue in each analysis period, and creates pattern classification information which classifies the calculated stock price trends of a plurality of the issues into a plurality of patterns for each analysis period. A client 20 receives the created information of the plurality of classification patterns, and shows the pattern classification information of each analysis period on a display 23 sequentially.