In Washington, financial speculators have fat targets on their backs. They are being blamed for high gas prices, soaring grocery bills and volatile commodity markets, and lawmakers are lashing out at market regulators for not cracking down on them more vigorously.“You study it, but you don’t act against this incredible increase in speculation,” Senator Carl Levin, Democrat of Michigan, complained to a senior official of the Commodity Futures Trading Commission at a recent Senate hearing. “Unless the C.F.T.C. is going to act against speculation, we don’t have a cop on the beat.”Just this week, Senator Joseph I. Lieberman, the Connecticut independent, said he was working on a proposal to ban large institutional investors from the commodity markets entirely. The same day, the Bush administration endorsed another Senate proposal to create a new federal interagency task force to investigate commodity speculation. At least four public hearings have explored the topic in just the last two months, and Senator Lieberman will hold another session on June 24.Although it is common in tough financial times to blame the speculators, this escalating hostility toward them is starting to worry people with years of knowledge about how commodity markets work. Because without speculators, they say, these markets do not work at all.Speculators, people willing to risk their capital in search of high profits, are central to healthy commodity markets, they say, and broad-brush restrictions on them could damage markets that are already under pressure from rising global demand for food and fuel. Even in Washington, there is widespread agreement that no single factor is responsible for rising food and energy prices. The hungry, high-growth economies of India and China are fundamentally affecting worldwide demand, while uncooperative weather and government policies on trade and ethanol are among the many factors affecting supply. Commodities, priced in American dollars, tend to rise in price as the dollar weakens, making commodities a popular haven for investors .But beneath all these external factors is the simple seesaw of the marketplace: For every person who buys oil at $130 a barrel, there must be another person willing to sell at that price — and, odds are, at least one of them will be a speculator.As political pressure has grown, regulators have stepped up their demands for more detailed trading information from commodity exchanges, to improve their ability to monitor trading.In a statement this week, Walter Lukken, the C.F.T.C. chairman, said the commission was determined to see that commodity prices were set “by the fundamental forces of supply and demand, rather than by abusive or manipulative practices.
