In finance, a stock market index or stock index is an index that measures the performance of a stock market, or of a subset of a stock market. It helps investors compare current stock price levels with past prices to calculate market performance.
In finance, a stock market index or stock index is an index that measures the performance of a stock market, or of a subset of a stock market. It helps investors compare current stock price levels with past prices to calculate market performance.
Source: Wikipedia "Stock market index" · CC BY-SA 4.0
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