The NSE Nifty also slipped below the 9,100-mark, as the markets remained on a downward path for the third day.
Brokers said that the mood was downcast after reports suggested India's GDP may grow at a slower rate of 6.7 per cent in the current quarter, while cues were negative from the global markets where investors remained cautious following the news
of North Korea failing a nuclear test and developments on the US President Donald Trump's tax cut probability.
Global brokerage house Nomura said the overall economic activity is yet to bounce back to the levels seen prior to demonetisation.
Markets worldwide have been under pressure on concerns about Donald Trump's ability to deliver his key economy-boosting policies, brokers said.
The Sensex, which had lost 163.54 points in the previous two sessions, dropped another 317.77 points, or 1.08 per cent, to end today at 29,167.68 -- its lowest closing since March 10. It saw the biggest one-day slump since December 2 last year when it had lost 329.26 points.
Mid-cap and small-cap indices fell 0.95 per cent and 0.90 per cent, respectively, on sustained selling pressure from retail investors.
The 50-share NSE Nifty tumbled 91.05 points, or 1.00 per cent, to end at 9,030.45.
Among blue-chips, Bharti Airtel suffered the most by diving 3.18 per cent to Rs 338.50.
Other major losers included Tata Motors, ITC, ICICI Bank and Bajaj Auto, all of which dropped more than 2 per cent. Besides, M&M, SBI L&T and Maruti Suzuki also lost value.
However, Lupin, Wipro, Cipla, Sun Pharma, Dr Reddy's and Hindustan Unilver ended in the green and cushioned the overall fall of the Sensex.
Anupam Singhi, COO of William O'Neil India said, "The benchmark indices extended losses for a third straight session, amid weak global market cues. The same trend was observed on peer share markets as investors remained cautious following the news
of North Korea failing a nuclear test and developments on the US President Donald Trump's tax cut probability."
Metal shares lost momentum due to fall in commodity prices globally. JSW Steel, SAIL, Hindalco, Tata Steel, Jindal Steel and Vedanta were down up to 2.86 per cent.
Foreign portfolio investors (FPIs) are believed to have sold heavily today. They had bought shares worth a net Rs 1,662.72 crore yesterday, as per the provisional data.
Domestic institutional investors (DIIs) had sold shares worth a net Rs 798.57 crore yesterday.
Globally, Asian stocks posted their biggest drop in two weeks tracking overnight losses on the Wall Street. Japanese stocks led the decline by diving 2.13 per cent. Key indices in China, Hong Kong and Singapore dropped by up to 1.18 per cent.
Stock markets in France, Germany and the UK also opened weak today.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)
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