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Comment Re:Contribution to society? (Score 1) 260

It helps investors to quickly buy and sell securities for a fair price. Of course most members of society don't invest themselves but somebody else does for them. For example: your pension fund invests your money in securities for you. Another example: Corporations that sell commodities and want to hedge their income stream. If they can secure a good price for their products they can focus on what they do best: produce.

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The best book on programming for the layman is "Alice in Wonderland"; but that's because it's the best book on anything for the layman.

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