Position limits being considered by the US Commodity Futures Trading Commission to eliminate "excessive" market speculation could create problems for companies trading energy commodities, said John England, managing partner for energy in Deloitte & Touche LLP's markets consulting practice. Proposed regulatory changes would affect hedge funds, banks, insurance, and other firms, said England. "It is important for most energy market participants to consider the potential impacts of these proposed rule changes on their ability to manage risk," he said.To centrally regulate the OTC market, all transactions would be through monitored clearing exchanges. "Although it...