Wall Street stocks closed little changed on Wednesday trading session with the benchmark index Nasdaq Composite rising for the first time in five days as investors weighed prospects from escalating political tension in Ukraine and slowing China's economy. The Standard & Poor's 500 Index added 0.03% to 1,868.2, the Dow Jones industrial average slipped 0.07% to 16,340.08 and the Nasdaq gained 0.37% to 4,323.332.