Mumbai, May 22 (PTI): Benchmark Sensex declined by nearly 645 points while Nifty retreated to 24,600 level due to selling in IT, oil and FMCG shares amid a global equity rout triggered by surging bond yields and US debt concerns.
The 30-share BSE Sensex tanked 644.64 points or 0.79 per cent to settle at 80,951.99 with 27 of its constituents ending lower. The index opened lower and tanked further 1,106.71 points or 1.35 per cent to hit a low of 80,489.92 during the day due to across-the-board selling.
The NSE Nifty tumbled 203.75 points or 0.82 per cent to 24,609.70.

From the Sensex firms, Mahindra & Mahindra, Bajaj Finserv, Tech Mahindra, Power Grid, ITC, Hindustan Unilever, Reliance Industries and Maruti were the biggest laggards.
IndusInd Bank, Bharti Airtel and UltraTech Cement were the gainers.
"The key benchmark indices witnessed declines amid US fiscal concerns that the proposed budget bill could significantly increase the national debt, pushing US treasury yields higher due to tepid long-term bond demand. Adding to the pressure, a major credit rating agency’s downgrade of the US credit outlook sparked broad-based selloffs across Asian markets," Vinod Nair, Head of Research, Geojit Investments Limited, said.
US bond yields breached the 5 per cent mark while Japanese bond yields surged to 3.5 per cent which prompted sell-off in riskier assets and emerging markets like India.
"Indian equities followed their global counterparts and witnessed major sell-off after a sharp spike in US and Japanese bond yields made investors risk averse towards equities," Prashanth Tapse, Senior VP (Research), Mehta Equities Ltd, said.
The BSE midcap gauge declined 0.33 per cent while smallcap index went up by 0.17 per cent.
Among sectoral indices, energy dropped the most by 1.25 per cent, followed by FMCG (1.25 per cent), BSE Focused IT (1.19 per cent), oil & gas (1.13 per cent), IT (1.09 per cent) and auto (0.87 per cent).
Telecommunication and services were the gainers.
As many as 2,178 stocks declined while 1,741 advanced and 167 remained unchanged on the BSE.
In Asian markets, South Korea's Kospi, Japan's Nikkei 225 index, Shanghai's SSE Composite index and Hong Kong's Hang Seng settled lower. Markets in Europe were trading in the negative territory.
US markets ended sharply lower on Wednesday.
Global oil benchmark Brent crude declined 1.37 per cent to USD 64.02 a barrel.
Foreign Institutional Investors (FIIs) turned buyers on Wednesday after a day's breather. They bought equities worth Rs 2,201.79 crore, according to exchange data.
The BSE benchmark jumped 410.19 points or 0.51 per cent to settle at 81,596.63 on Wednesday. The Nifty climbed 129.55 points or 0.52 per cent to 24,813.45.


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Mangaluru: Congress leader and former minister B Ramanath Rai slammed BJP leader R Ashoka for calling AICC General Secretary KC Venugopal an agent of the party high command, and asked if the general secretary and other office-bearers in the BJP were commission agents too.
Rai, who addressed a press meet at the Congress office in the city on Friday, expressed fury over the recent comments of the BJP leader that Chief Minister Siddaramaiah was presenting himself in a shameless manner in public life. Ashoka, who is also Leader of the Opposition (LoP) in the Karnataka Legislative Assembly, had said that the Congress government had ‘broken every previous record on corruption-related controversies’.
“Ashoka has spoken with sheer ignorance and displays his lack of maturity, as he often does while facing the media. KC Venugopal has been working at organization of the party and it is unbecoming of Ashoka to criticize Venugopal as he did,” Rai told reporters.
“Being in a responsible position, how acceptable is it for Ashoka to pass disrespectful, random comments about another leader who also holds a responsible position? If KC Venugopal is indeed an agent of the party high command, what should we consider BJP leaders to be? Are they brokers?” he asked
Commenting on Ashoka’s allegations of corruption in the Congress government in Karnataka, Rai pointed out, “The KSRTC land was sold to private parties when he (Ashoka) was transport minister. We can find several such cases across the state, which need to be probed.”
The former minister, however, refused to comment on the incident that occurred at Mangaluru airport during CM Siddaramaiah’s visit to the city recently.
Former mayors Ashraf and Shashidhar Hegde, Congress activists Vishwas Kumar Das, Subhodaya Alva, Shabeer, Baby Kundar, Padmanabha, Nazeer Bajal and Prem were present.
