Share Market News Today: The Sensex and the Nifty opened flat with a negative bias on May 27. The 30-share Sensex opened at 82038.2 level down by 138.25 points or 0.16 per cent and the Nifty 50 opened at 24,956.65 level down by 0.17 per cent. Soon after the market opened the headline indices witnessed a steep decline with the Sensex declining over 1 per cent or 900 points to 81,261.96 and the Nifty 50 tumbling over 1 per cent or 263.45 to 24,737.7 levels.