| http://www.w3.org/ns/prov#value | - Critics argue the practice increases volatility in the market and might give some an unfair advantage, while proponents say the tool is an innovation that helps keeps markets liquid and accessible.Sen. Mark Kirk (R-Ill.) said speedy trading was critical to commodities markets based in his home state, and criticism amounted to ???demonizing of things we don???t understand.??????The moment Congress
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