The Bombay Stock Exchange benchmark Sensex tumbled over 380 points on Friday on heavy selling by funds, triggered by weak global markets.
The BSE 30-share index, which closed 76.98 points up on Thursday, lost 380.13 points at 15,396.18 in the first five minutes of trade.
Similarly, the National Stock Exchange's Nifty toppled 139.20 points at 4,480.60.
The selling was sparked by reports of a major slide in leading global markets. All the index related stocks in Nifty and Sensex were in red.