S&P 500
A weighted index of 500 of the widely-held mid-cap and large-cap stocks. The movement of the S&P 500 is generally regarded as accurately reflecting the performance of the market as a whole. See Broader Market; NASDAQ 100; Russell 3000; Wilshire 5000.
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broad-based index
market index deposit (MID)
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Russell 3000
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investment grade debt instrument
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