The 30-share BSE benchmark Sensex tanked 790.87 points to 73,821.56 in early trade. The NSE Nifty slumped 231.15 points to 22,313.90. The 30-share BSE benchmark Sensex tanked 790.87 points to 73,821.56 in early trade. The NSE Nifty slumped 231.15 points to 22,313.90. Zee News :Business