Fifty-six years ago today, on November 24, 1969 (October 15, 1969 in the lunar calendar), the Hong Kong Hang Seng Index began to be published. The Hong Kong Hang Seng Index is the oldest and most influential stock price index in the Hong Kong stock market. It was published by Hang Seng Bank of Hong Kong on November 24th, 1969. The Hang Seng Stock Price Index includes representative and economically strong stocks of large companies selected from Hong Kong listed companies as constituent stocks, and is divided into four categories-financial industry stocks, utility stocks, real estate stocks and other industrial and commercial stocks (Including aviation and hotel) stocks, the total number of constituent stocks as of 2012 was 42. These stocks account for more than 60% of the market value of Hong Kong's stocks, because the stock index involves various industries in Hong Kong and is highly representative. The compilation of the Hang Seng Stock Price Index is based on July 31, 1964, because the Hong Kong stock market is operating normally on this day, and the transaction value is even, which can reflect the basic situation of the entire Hong Kong stock market. The base point is determined to be 100 points. The calculation method is to multiply the daily closing price of 33 kinds of stocks by the number of issued shares as the market value on the calculation date, then compare it with the market value of the base period, and multiply it by 100 to obtain the stock price index of that day. Since the base period selected by the Hang Seng Stock Price Index is appropriate, the Hang Seng Stock Price Index can basically reflect the activity of the entire stock market, whether the stock market is soaring or falling sharply, or at normal trading levels. Since the publication of the Hang Seng Stock Price Index in 1969, it has undergone many adjustments. Since the Hong Kong authorities passed legislation in August 1980 to merge the Hong Kong Stock Exchange, the Far East Exchange, the Gold and Silver Stock Exchange and the Kowloon Stock Exchange into the Hong Kong Stock Exchange, in the current Hong Kong stock market, only the Hang Seng Stock Price Index coexists with the newly generated Hong Kong index, and other stock price indexes in Hong Kong no longer exist. The staff of HKEX are working hard