NSE Nifty ends flat amid profit-booking and caution ahead of the US Fed decision. Benchmark stock indices Sensex and Nifty closed largely unchanged in a highly volatile trade on Tuesday amid profit-taking in IT and blue-chip banking shares, elevated crude oil prices and caution ahead of the US Federal Reserve's policy decision. The 30-share BSE Sensex slipped 8.08 points, or 0.01 per cent, to close at 73,598.67, with 17 constituents higher, 12 lower and one unchanged.