Benchmark indices broke three-day profitable streak and ended decrease on August F&O expiry day. At shut, the Sensex was down 255.84 factors or 0.39% at 64,831.41, and the Nifty was down 93.70 factors or 0.48% at 19,253.80. Largest losers on the Nifty included Adani Enterprises, BPCL, Adani Ports, Eicher Motors and Britannia Industries, whereas gainers have been Maruti Suzuki, Cipla, HDFC Life, Titan Firm and Hindalco Industries.