Sensex plunges 950 pts intraday, SmallCap index 4%; Why markets fell today?

In a volatile session On Monday, the BSE Sensex crashed up to 962 points or 1.17 per cent to 80,726.06 levels, while NSE's Nifty50 fell 244 points or 0.97 per cent at 24,770 levels in intraday deals