The U.S. Senate Permanent Subcommittee on Investigations asked energy-market regulators to hand over “key documents” from a probe of JPMorgan Chase & Co. as lawmakers examine banks’ roles in commodities markets, Bloomberg News reported yesterday. Sen. Carl Levin (D-Mich.), who leads the panel, and Sen. John McCain (R-Ariz), its ranking Republican, sent a letter to the Federal Energy Regulatory Commission seeking records from the agency’s inquiry and settlement with JPMorgan, according to a copy of the Aug. 2 request obtained by Bloomberg News. The lawmakers asked the FERC to include a 70-page document outlining investigators’ findings, which was cited in articles by the New York Times. The regulator kept that document private when announcing a $410 million accord with JPMorgan last month.