Sensex slumps 1,230 pts; VIX soars 9.57%

At 11:30 IST, the barometer index, the S&P BSE Sensex tumbled 1,230.68 points or 1.46% to 83,045.56. The Nifty 50 index dropped 372.85 points or 1.45% to 25,424.05