At close, the Sensex was down 283.60 points or 0.44 percent at 63,591.33, and the Nifty was down 90.40 points or 0.47 percent at 18,989.20. Top losers on the Nifty included Adani Enterprises, Coal India, Adani Ports, SBI Life Insurance and Asian Paints, while gainers were Sun Pharma, BPCL, Hindalco Industries, Bajaj Auto and Reliance Industries.