Indian stock market shed previous losses in a volatile session on Friday with the Nifty trading near 25,700.At close, the Sensex was up 266.47 points or 0.32pc at 83,580.40, and the Nifty was up 50.90 points or 0.20pc at 25,693.70.Broader markets showed a mixed performance as the Nifty Midcap index