Brexit bump instills no confidence on sullen bond trading floors

Revenue from fixed income, currency and commodities trading was up 24 percent at the five biggest U.S. banks in the second quarter from a year ago, to $11.8 billion, according to a Reuters calculation based on the banks' reported results. Results were helped by Britain's surprise vote to leave the European Union, which rippled across global markets – including record currency volumes for some big banks. Some upcoming monetary policy decisions may spur more action, but Wall Street's hopes a