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This makes Mark Cuban's article on High Frequency Trading (HFT) even more relevant than it was before (link: http://blogmaverick.com/2012/09/21/what-business-is-wall-str...). WHY is it not regulated or at the very least taxed, when it creates such outsized risk for the public and doesn't accomplish anything for the market besides increased volatility

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If you're so worried about it, just don't invest in markets that allow it. The "public" is only capable of risking their own money.

Most people can't do that because their money will be put there by their 401K (which if they don't put money in willl lose out as well).

This sounds like "don't go outside if you're worried about being mugged". Sorry, no we almost all pay taxes used for bailouts and have our retirements invested there by our employers. We get to criticize and advocate for change.

Please look at who got hailed out and what they were doing.

Issuing a sham mortgage is not a high frequency trade.

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