The head of the U.S.Commodity Futures Trading Commission took his case for imposing speculative trading limits on energy products to Europe Wednesday where he urged foreign regulators to use all of their existing powers to police the markets.

The head of the U.S.Commodity Futures Trading Commission took his case for imposing speculative trading limits on energy products to Europe Wednesday where he urged foreign regulators to use all of their existing powers to police the markets.

In a speech in Paris before the International Energy Agency, CFTC Chairman Gary Gensler spoke about the benefits of position limits, saying they can "enhance liquidity by promoting more market participants" and help prevent a select few traders from dominating the market.

"To effectively regulate the energy markets requires cooperation on the parts of the CFTC, the Securities and Exchange Commission and foreign regulators," Gensler said in prepared remarks.

"It is incumbent upon the CFTC and other regulators to use our existing authorities to promote market integrity and transparency and to guard against fraud, manipulation and other abuses."

Gensler made his speech just as his agency is gearing up to likely impose sweeping new buying limits on energy futures products and possibly scale back or eliminate the exemptions that big banks and index funds rely on to circumvent those limits.

Additionally, the CFTC is also seeking expanded new powers from Congress so it can also impose limits across all markets, and not just on futures exchanges.

Part of that new authority could entail obtaining new powers to impose limits on certain contracts traded on foreign exchanges in an effort to close the so-called London Loophole, which critics claim has allowed U.S. traders to circumvent regulations.

"The United States, like the rest of the world, benefits from a regulated market economy," Gensler said. "We will continue to work with international regulators, Congress and the administration to comprehensively regulate over-the-counter derivative markets."

Critics of the CFTC's plans to press forward with new trading limits say the agency should not act until it wins authority from Congress to oversee the over-the-counter trading. They also fear that tough new regulations in the U.S. could cause business to migrate overseas.

Provisions in the Obama administration's draft proposal on derivatives would give the CFTC broad new powers over foreign exchanges by requiring them to register with the agency if they hope to offer U.S. traders direct electronic access to their trading platforms.

That proposal goes well beyond the efforts the CFTC has already taken internally to close the so-called London Loophole. The efforts have focused solely on regulating foreign contracts offered to American-based traders, which settle against the prices of contracts traded on U.S. futures exchanges.

Currently only one foreign exchange- IntercontinentalExchange's (ICE) ICE Futures Europe - offers several energy contracts that settle against futures traded on the New York Mercantile Exchange.

For the past three years, the CFTC has worked with ICE and U.K. regulators to impose reporting requirements and trading limits on those select contracts. Most recently, the CFTC tweaked that agreement so it will be able to do on-site inspections at the London-based exchange.

Separately, the CFTC also this month entered another cooperative agreement with the U.K.'s Financial Services Authority to beef up the cross-border regulation of clearinghouses.

Gensler did not offer his thoughts about the Obama administration's tough proposal for overseeing foreign exchanges in his speech Wednesday, but he urged regulators to think about the benefits of position limits.

"It is our job to make certain that futures markets work for the broad public," he said.