The global banking giants — think of JPMorgan Chase or HSBC — make a nice return by capturing their share of the trillions of dollars that course through financial markets each day.
But few are as reliant on this business — be it swapping currencies, selling bonds or structuring derivatives — as Deutsche Bank, the giant lender that has made its name not as a home for German savers but as a place for hedge funds and other risk-loving investors to put on some of their boldest financial bets.
