What the U.S. Senate's Permanent Subcommittee on Investigations was taking testimony on yesterday, however, was far from an "error" committed by Deutsche Bank. Both Deutsche Bank and Barclays were shown, through emails, marketing materials and witness testimony, to have set up elaborate schemes to effectively loan out their balance sheet to hedge funds to conduct billions of trades each year in trading accounts under the bank's name, deploying massive leverage that is illegal in a regular Prime Brokerage account for a hedge fund client.