Continuing their losing spell for a ninth session in a row on Monday, the BSE Sensex crashed over 372 points and the NSE Nifty dived nearly 130 points on sustained sell-off across the board.
The index widened its loss towards the fag-end on emergence of intense selling in heavyweights like ITC, RIL and ICICI Bank.
In percentage terms, however, Sun Pharma was the biggest loser with 9.39 per cent drop.
Intra-day, the pharma major's shares tanked over 20 per cent.
Other top Sensex laggards were Yes Bank, Tata Steel and Indusind Bank -- falling as much as 5.58 per cent.
After trading range-bound for most part of the day, the 30-share BSE benchmark saw steep plunge in the last hour and closed 372.17 points, or 0.99 per cent, lower at 37,090.82.
The index hit an intra-day low of 36,999.84 and a high of 37,583.57.
Similarly, the broader NSE Nifty sank 130.70 points or 1.16 per cent to settle at 11,148.20 points. During the day, the NSE gauge hit a low of 11,125.60 and a high of 11,300.20.