Trading for the day began on a subdued note as the key benchmark indices saw a gap-down opening on negative Asian stocks. At 9:28 IST, the barometer index, the S&P BSE Sensex, was down 275.92 points or 0.77% at 35,608.49. The Nifty 50 index was down 97 points or 0.9% at 10,685.90.