Indian equities extended their losses for the second consecutive session on Monday as benchmark indices slipped amid last-minute selling and the absence of meaningful market triggers. The BSE Sensex dropped 331.21 points , or 0.39% , to close at 84,900.71 after falling as much as 521 points intraday. The NSE Nifty declined 108.65 points , or 0.42%, to end at 25,959.50.