The BSE Sensex down more than 850 points as banking, financial stocks plunge amid rise in Covid-19 cases across the country. The broader NSE Nifty sank 230 points or 1.54 percent to close at 14,638. Stocks of SBI, M&M, Bajaj Finance, IndusInd Bank, Bajaj Auto and ICICI Bank in the BSE pack are down as much as 5.69 per cent.