The Bombay Stock Exchange benchmark Sensex tumbled by over 468 points in early trade on Friday on heavy selling by funds, triggered by weak global markets.
The BSE-30 share barometer, which lost 114 points in previous day's trade, dropped further by 468.58 points at 19,255.77 in first five minutes of trading.
The National Stock Exchange's Nifty fell by 152.20 points at 5,714.25.
Marketmen said the trading sentiment turned bearish in line with a similar trend in overseas markets.
Concerns over higher oil prices that could fuel inflation and slow consumer spending also impacted the trading sentiments, they added.