Two global banks, Deutsche Bank and Barclays Bank, and more than a dozen hedge funds, such as RenTec, misused a complex financial structure to claim billions of dollars in unjustified tax savings and to avoid leverage limits that protect the financial system from risky debt, a Senate Subcommittee investigation has concluded. The improper use of this structured financial product, known as basket options, is the subject of a 93-page report and 5 hours of testimony.
Please see the story and links to releavnt document and recorded webcast http://lawprofessors.typepad.com/intfinlaw/2014/07/hedge-funds-using-basket-options-to-recharacterize-income-as-long-term-capital-gain-bypass-leverage-.html
William Byrnes' Tax, Wealth, and Risk Intelligence 