Sensex tanks 500 points, Nifty slips below 15,800; HDFC Bank drops 3%
The S&P BSE Sensex index fell as much as 633 points to touch 52,506.40 in the first few minutes of trade, and the broader NSE Nifty50 benchmark dipped to as low as 15,735.95, down 187 points from its previous close.