At today's Senate Agriculture Committee hearing, even Andrei Kirilenko, the former CFTC chief economist and now MIT professor brought in to critique HFT, outlined a regulatory path rather than a firing squad.Those who dislike and distrust speculators, particularly clever speculators, will not be mollified, but today's Senate Agriculture Committee hearing suggested that high frequency trading (HFT) is here to stay. Chicago Mercantile Exchange (CME) chief Terry Duffy claimed concurrence by regulators that today's futures markets are more open and transparent than ever before. He noted that electronic trading has increased liquidity and narrowed bid/ask prices. Additionally, since the CME has imposed price/quantity limits and other means of bl...