U.S. stocks rose on Thursday, adding to earlier gains after data showed an unexpected fall of U.S. jobless claims to its lowest level in six weeks and as the European Central Bank maintained its benchmark interest rate unchanged. Dow Jones Industrial average futures rose 0.07% to 14,300, Standard and Poor's 500 Index futures added 0.10% to 1,543 and futures for the Nasdaq 100 Index surged 0.49% to 2,796.