Money | speculators As Prices Soar, Congress Aims at Speculators Out-of-control traders may be driving up oil, food costs, pols say By Kevin Spak Posted Jun 13, 2008 8:30 AM CDT Copied High gas prices posted at both a Valero gas station, which is a Exxon-branded gas station in California, and Shell gas stations in San Bruno, Calif., Thursday, May 1, 2008. (AP Photo/Paul Sakuma) Congress is blaming rampant commodity speculation for rocketing gas and food prices, and berating regulators for letting it happen, the New York Times reports. Unless watchdog groups like the Commodities Futures Trading Commision crack down, Carl Levin says, "we don’t have a cop on the beat.." Joe Lieberman has even introduced a bill to ban institutional investors from commodity markets. Speculators are a market necessity, adding the liquidity that keeps prices reasonably stable. But big speculators, the congressmen argue, are manipulating the market illicitly. “There is a difference between speculation and excessive speculation,” says Lieberman, but Congress has to “legislate that definition better. We can’t just say, as Justice Potter Stewart once said of pornography, that we know it when we see it.” Read These Next FBI says 'person of interest' in Kirk killing is in custody. Charlie Kirk's death has been confirmed. Moment of silence for Kirk ends in House shouting match. Two photos show 'person of interest' in Kirk shooting. Report an error