2012年5月24日 星期四

S&P 500 - Wikipedia, the free encyclopedia

S&P 500 - Wikipedia, the free encyclopedia:

The S&P 500 stands for Standard & Poor 500 and is a free-float capitalization-weighted index published since 1957 of the prices of 500 large-cap common stocks actively traded in the United States. The stocks included in the S&P 500 are those of large publicly held companies that trade on either of the two largest American stock market exchanges: the New York Stock Exchange and the NASDAQ.[citation needed]


S&P 500 Companies

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