The Bombay Stock Exchange benchmark Sensex fell further by over 88 points in opening trade on Thursday as foreign funds as well as investors continued to sell stocks amid a weakening global trend.
The 30-share index, which lost 49.18 points in the previous session, fell by 88.43 points, or 0.51 per cent to 16,999.53 points in the first five minutes of trading.
Likewise, the wide-based National Stock Exchange index Nifty declined by 32.65 points, or 0.63 per cent, to 5092.25 points.
Brokers said selling pressure continued for the fourth day with European as well as Asian markets remaining shaky amid reports that Greece's sovereign debt crisis could spread to Spain and Portugal.
Meanwhile, Japan's Nikkei dropped 2.11 per cent while Hong Kong's Hang Seng index by 0.69 per cent in early trade. The US Dow Jones declined by 0.54 per cent on Wednesday.