Marking the eighth biggest single-day fall, the Sensex closed 807.07 points down at 22,951.83 -- a new low for the index during the current NDA regime and the lowest since May 8, 2014 -- when the Lok Sabha elections were underway that saw BJP-led alliance sweeping to power.
Putting the blame for the fall on global factors, the government today sought to put a brave face saying the fall in market benchmarks this year has been just about 10 per cent as against much higher declines in other markets.
A fall of 20 per cent from an all-time peak is considered as a 'bear market' -- a term used for a sustained slide.
Experts said the global headwinds remain a major concern but the domestic woes, including ballooning NPAs being reported by the banks and weak quarterly earnings in various other sectors, have added to the market weakness.
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In today's session itself, the total investor wealth -- measured in terms of cumulative value of all listed stocks on BSE -- slumped by over Rs 3 lakh crore -- taking the total loss since start of the week to nearly Rs 7 lakh crore.
"Relentless selling in the stock market is coming from redemption pressures, margin calls, crude slumping to multi- year lows, depreciating rupee against dollar and disappointing earnings," said Gaurav Jain, Director of Hem Securities.
NSE's Nifty also saw its biggest fall in six months to end at a 21-month low of 6,976.35.
Besides, gold prices soared to a 18-month high, tracking gains in global markets as safe assets' appeal rose while the rupee also regained 68-mark against the US dollar.
SBI today reported a plunge of over 67 per cent in its third-quarter net profits while a number of other banks have also reported weak results on worsening bad loan scenario.
European shares were also lower with indices in France,
Germany and the UK staring at losses of up to 4 per cent as global sell-off intensified.
Trying to calm jittery investors, Economic Affairs Secretary Shaktikanta Das said the decline in markets in India is not as bad as in some other countries and the government is prepared to deal with challenges emanating from global developments.
Besides, Reserve Bank Governor Raghuram Rajan said the current market turmoil will pass.
However, these statements by the policymakers failed to stop domestic benchmarks from recording their worst single-day fall since August 24, as 28 stocks out of the 30-share Sensex pack ended lower, while only drug makers Cipla and Dr Reddy's manage to log gains.
Major losers were Adani Ports (6.94 pc), BHEL (6.01 pc), Tata Motors (5.55 pc), ONGC (5.23 pc), M&M (4.93 pc), Tata Steel (4.52 pc), HDFC (4.37 pc), RIL (4.15 pc), Axis Bank (3.99 pc), GAIL (3.85 pc), Maruti (3.85 pc), ICICI Bank (3.77 pc), HDFC Bank (3.73 pc), Lupin (3.73 pc), ITC (3.29 pct), TCS (3.26 pct), HUL (3.14 pct) and Wipro (3.04 pc).
Among the sectoral and industrials indices, realty fell by 5.94 per cent, utilities (4.3 pc), power (4.81 pc), industrial (4.53 pc), finance (3.97 pc), energy (3.92 pc), oil&gas (3.82 pc) and bankex (3.81 pc).
The market breadth remained negative as 2,359 shares ended lower, 324 advanced, while 96 ruled steady of the total 2,779 stocks traded.
The total turnover moved-up to Rs 2,972,11 crore from Rs 2,925.40 crore yesterday.