A50 Index is an index composed of the top 50 qualified companies selected from the A-share market according to the compilation rules of Xinhua FTSE A-share index. Its performance, liquidity, volatility, industry distribution, market representativeness and other indicators are at the leading level in the market. The index is based on the 50 A-share companies with the largest market value adjusted according to the circulation ratio in Shanghai and Shenzhen stock markets, with July 2 1 as the base period and 5000 points as the base point, and the sample stocks are adjusted regularly in June 1, April, July and June 10 every year. At present, A50 index accounts for 33.2% of the circulating market value of qualified A-share market, including China Unicom (600050), China Merchants Bank (600036), China Petrochemical, baoshan iron & steel, Shenzhen Development, Changjiang Electric Power (600900), Shanghai Automobile and other large-cap stocks.

It should be based on the data analysis of these 50 companies.