It was day of extreme volatility on Dalal street. NSE’s Nifty 50 and BSE’s Sensex 30 both opened in green territory and gained around half a percent in the initial trade. But the rally was short lived, as financial stocks, both banks and NBFCs, came under heavy selling pressure, taking the Nifty and sectoral index, Bank Nifty, deep into red in mid-session trade.