Cautious approach of investors ahead of the Reserve Bank of India's quarter review of Monetary Policy at 1100hrs tomorrow also affected the market sentiment.
The sensex resumed lower at 20,899.03 and dropped further to 20,787.25 before quoting at 20,822.60 at 1030 hrs, showing a sharp fall of 310.96 pts or 1.47 pct from its last weekend's level
The NSE-50 share Nifty also fell by 95.85 points or 1.53 per cent to 6,170.90 at 1030hrs.
Asian stocks declined sharply in their early trade as US stocks witnessed a steep slide on last Friday on concern that the fear of global economic recovery faltering spurred investors to sell riskier assets. Key benchmark indices in Taiwan, Hong Kong, China, Singapore, Japan, Indonesia and South Korea were off 0.69 pct to 2.99 pct.
The domestic market sentiment was hit adversely by data showing that foreign funds were net sellers on last Friday. Foreign institutional investors (FIIs) sold shares worth a net Rs 230.96 crore as per provisional data from the stock exchanges.