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S&P 500 top 10 issues annually by % of index market value from 1980 - 2007
S&P 500 top 50 issues by % of index market value from 1980 - 2007
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S&P 500 issues needed to comprise 50% of the index market value 1980 - 2007
Standard & Poor's Issues By Market Value is a product of the
Standard & Poor's Quantitative Services Group.
