At close, the Sensex was down 1,011.29 points or 3.20% at 30636.71, while Nifty was down 280.40 points or 3.03% at 8981.45 after US crude futures fell into negative territory for the first time.IndusInd Bank plunges 11%. Infosys slipped 2 per cent post-March quarter results while oil-related stocks like Reliance Industries (down 5%) were also under pressure. Bajaj Finance, ICICI Bank, Hindalco Industries and Zee Entertainment were among major losers on the Nifty, while gainers were Dr Reddy’s Labs, Bharti Infratel, Bharti Airtel, Hero MotoCorp and Cipla. About 732 shares have advanced, 1647 shares declined, and 152 shares are unchanged Pharma outperforms.Nifty Metal down 5.8 per cent.BSE Midcap and Smallcap indices fell 2.5-3 per cent.