Hedge funds fell 2.9 percent in May, their worst month since September, as stocks slumped on concern Greece may exit the euro and the global economy is weakening, Bloomberg News reported yesterday. The decline was driven by long-short equity, multistrategy and global macro funds, according to data compiled by Bloomberg. Hedge funds have lost 1.3 percent since the start of the year, trailing a 0.9 percent gain for equities worldwide, including reinvested dividends.