Stock Market News: The BSE Sensex and the Nifty 50 ended flat with a positive bias on May 2. The 30-share Sensex closed at 80,501.99, which was up by 259.75 points or 0.32 percent. The Nifty 50 index also closed higher by 12.5 points or 0.05 per cent at 24,346.7.