Much as Coca-Cola's success results from soft-drink recipes unknown to its competitors, the success of investors is almost by definition a function of their individual analysis, which, if superior to that of competitors, allows them to outperform.

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Coca-Cola ( KO - news - people )'s success results from soft-drink recipes unknown to its competitors, the success of investors is almost by definition a function of their individual analysis, which, if superior to that of competitors, allows them to outperform.

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The exchange's function as a securities marketplace fits this definition, but what of its duty as a self-regulatory organization (SRO) to regulate its members and listed companies?

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The narrower definition has the ones unable to function in jobs or school at all.

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Some scientists say that this is simply a function of more awareness, better diagnosis and a broadening of the definition of what constitutes the disorder.

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