The Hang Seng Index (abbreviated: HSI, Chinese: ) is a freefloat-adjusted market capitalization-weighted
stock market index in Hong Kong. It is used to record and monitor daily changes of the largest companies of the
Hong Kong stock market and is the main indicator of the overall market performance in Hong Kong. These 40 companies represent about 65% of capitalization of the Hong Kong Stock Exchange.
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a market-value weighted index of the stock prices of the 33 largest companies on the Hong Kong market.