The key equity benchmarks, Sensex and Nifty, reversed their initial gains and traded flat amidst market volatility on Wednesday. At 10 am, the Sensexx recorded a decrease of 32.34 points or 0.04 per cent, settling at 73,635.62, while the Nifty declined by 47.20 points. Among the stocks traded, 569 witnessed advances, while 2,557 experienced declines, with 70 remaining unchanged.