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Money Magazine reveals that in the late 1990s the committee that designs the Standard&Poor's 500-stock index "began making dozens of highly subjective, often damaging changes to the index." The changes, which occurred without warning or precedent, cost American investors about $100 billion. The story sheds light on how the S&P committee works, and reveals that it is "probably the most powerful - and secretive - force in the U.S. stock market." The report lists the 10 biggest losers in the S&P 5000 as of the end of 2000.