1. Ministry of Economy, Trade and Industry (2019) “List:The 2019 Competitive IT Strategy Companies.” Available at: https://www.meti.go.jp/english/press/2019/pdf/0423_003a.pdf (Accessed 27 April 2022).
2. Ministry of Economy, Trade and Industry “The outline of the DX Stocks (in Japanese).”Available at: https://www.meti.go.jp/policy/it_policy/investment/keiei_meigara/dx_meigara.html (Accessed 27 April 2022).
3. "An empirical study of the stock market reaction to the announcement of the Competitive IT Strategy Company Stock Selection: An event study approach (in Japanese).";Matsuno;Journal of Japan Society for Production Management,2022
4. Yahoo! finance “Time-series stock price data.” Available at: https://finance.yahoo.co.jp/ (Accessed 27 April 2022).
5. "The adjustment of stock prices to new information.";Fama;International Economic Review,1969