Text Mining of Securities Reports for Discovering Reason of Change

摘要

A stock market is a base of the economic activity in present-day free economy society. In order to become a listed company, there is a severe examination. Furthermore, yearly duty is attached by law for the listed company to file the fixed form report about the financial condition. In this paper, correspondence of the numeric data about the activity of a company and text data is analyzed for the financial report. All of 68 medical-supplies-related listed companies were chosen first. Then, the feature words were extracted from the reports of the companies where achievements have improved favorably. Moreover, the feature words of the financial report of the time were extracted about the companies where achievements carried out the sharp reversal to profitability.