H.R. 4066: To amend the Commodity Exchange Act to close the Enron loophole, prevent price manipulation and excessive speculation in the trading of energy commodities, and for other purposes. H.R. 4066: Close the Enron Loophole Act Referred to the House Committee on Agriculture. 2007-11-01 H.R. 4066: Close the Enron Loophole Act h H.R. 4066: Close the Enron Loophole Act (110th Congress) Close the Enron Loophole Act To amend the Commodity Exchange Act to close the Enron loophole, prevent price manipulation and excessive speculation in the trading of energy commodities, and for other purposes. 2007-11-01 110 2007-11-01 4066 introduced HouseBill LegislativeAction OfficialTitle ShortTitle