This is triggered by fall in the global markets coupled with depreciation of rupee value against the dollar.
Bharat Heavy Electricals (Bhel) extended yesterday's steep losses following the company's weak Q1 results.
The rupee weakened against the dollar to record low of 61.51 per dollar in the late morning trade. It had hit record low of 61.21 against the dollar in intra-day deals on July 8 this year.
The sensex resumed lower at 19,127.10 and dropped further to 18,969.65 before quoting at 18,978.17 at 1040 hrs, showing a loss of 204.09 points, or 1.06 per cent from its last close.
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Major losers were Sterlite Ind (4.45 pct), Tata Steel (3.44 pct), Tata Power (3.23 pct), HDFC Bank (3.04 pct), BHEL (2.81 pct) and Bajaj Auto (2.27 pct).
Asian stocks fell in their early trade as stronger growth in American service industries fuelled speculation that the US Federal Reserve will soon be able to reduce economic stimulus.
Key benchmark indices in Hong Kong, China, Taiwan, Japan, Singapore, and South Korea dropped in a range of 0.16 pct to 1.64 pct.