Equity benchmark indices extended their bull run during early hours Monday with auto stocks leading the rally. At 10:15 am, the BSE SandP Sensex was up by 253 points or 0.44 per cent at 58,383 while Nifty 50 rose by 67 points or 0.39 per cent to 17,391. Sectoral indices were mixed with Nifty auto and realty up by 0.6 per cent. But Nifty financial services, metal and pharma were in the negative zone. Among stocks, Reliance Industries moved up by 2.8 per cent to Rs 2,456.90 per share while Grasim rose by 2.9 per cent.