Market reverses gains; Sensex slides 272 pts; media shares advance

At 11:30 IST, the barometer index, the S&P BSE Sensex was down 272.47 points or 0.36% to 77,206.46. The Nifty 50 index lost 47.70 points or 0.20% to 23,519.30. The Nifty clocked an all-time high of 23,667.10 in early trade.