Mumbai, Aug 22 (PTI): Equity benchmark indices Sensex and Nifty fell sharply by nearly 1 per cent on Friday, snapping their six-day winning streak, as investors turned cautious ahead of US Fed Chair Jerome Powell's Jackson Hole address amid growing global trade uncertainties triggered by Trump tariffs.
Intense selling in market heavyweights HDFC Bank and Reliance Industries also dampened risk appetite, traders said.
The 30-share BSE Sensex tumbled 693.86 points or 0.85 per cent to settle at 81,306.85. During the day, it plunged 708.94 points or 0.86 per cent to 81,291.77.

As many as 2,316 stocks declined while 1,765 advanced and 159 remained unchanged on the BSE.
The 50-share NSE Nifty dropped 213.65 points or 0.85 per cent to 24,870.10.
On the weekly front, the BSE benchmark jumped 709.19 points or 0.87 per cent, and the Nifty climbed 238.8 points or 0.96 per cent.
"Markets snapped a six-session winning streak and ended lower, losing nearly a per cent as sentiment turned weak from the outset and deteriorated further in the latter half.
"The weakness was primarily driven by caution ahead of US Fed Chair Jerome Powell’s Jackson Hole address and renewed concerns around global trade and geopolitical tensions, which dampened risk appetite. Domestic profit-booking after the recent rally and a pause in fresh FPI inflows further weighed on sentiment," Ajit Mishra - SVP, Research, Religare Broking Ltd, said.
From the Sensex pack, Asian Paints, UltraTech Cement, Tata Steel, ITC, HCL Tech, Kotak Mahindra Bank, Adani Ports, Tata Consultancy Services, HDFC Bank and Tech Mahindra were among the major laggards.
However, Mahindra & Mahindra, Maruti, Bharat Electronics and Sun Pharma were among the gainers.
The BSE smallcap gauge declined 0.35 per cent, and the midcap index dipped 0.23 per cent.
Among BSE sectoral indices, metal tanked 1.27 per cent, commodities (1.08 per cent), bankex (1.06 per cent), financial services (0.84 per cent), oil & gas (0.80 per cent), BSE Focused IT (0.77 per cent) and IT (0.77 per cent).
BSE Healthcare, telecommunication and capital goods were the gainers.
"Market sentiment turned cautious as profit-booking set in after a strong six-day rally driven by GST reform optimism and an S&P rating upgrade. Investors also awaited Powell’s comments, which could influence September's Fed policy direction. Adding to the pressure were concerns over the August 27 deadline for additional US tariffs on Indian goods," Gaurav Garg, Analyst, Lemonn Markets Desk, said.
In the six-day rally to Thursday, the BSE benchmark has climbed 1,765 points or 2.14 per cent, and the Nifty rallied 596 points or 2.4 per cent.
In Asian markets, South Korea's Kospi, Japan's Nikkei 225 index, Shanghai's SSE Composite index and Hong Kong's Hang Seng settled in positive territory.
Markets in Europe were trading in the green in mid-session deals.
The US markets ended lower on Thursday.
Foreign Institutional Investors (FIIs) bought equities worth Rs 1,246.51 crore on Thursday, according to exchange data.
Global oil benchmark Brent crude dipped 0.24 per cent to USD 67.52 a barrel.
On Thursday, the Sensex climbed 142.87 points or 0.17 per cent to settle at 82,000.71. The Nifty rose by 33.20 points or 0.13 per cent to 25,083.75.


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Barcelona (AP): Real Madrid slapped players Federico Valverde and Aurélien Tchouaméni with half-a-million-euro ($588,000) fines on Friday for their altercation during practice.
The massive fines came a day after the midfielders tussled when the team trained. Valverde said in a post on social media on Thursday that no punches were thrown. But Valverde knocked his head on a table and he suffered a small cut that required a brief hospital visit.
On social media, Valverde initially called it a “meaningless fight” with a teammate and said “everything has been blown out of proportion."
His employers, however, considered it a significant enough breach of team discipline to nail both Valverde and Tchouaméni with fines that bite even the bank account of a top soccer player. The half-a-million euro penalties reflect the reputational damage the club was enduring in a chaotic end to a disappointing season.
In a statement, the 15-time European champion said its disciplinary action was concluded after both players expressed to the club “their complete remorse for what happened and apologized to one another.”
Madrid added they also apologized to their teammates, the coaching staff and club supporters, as well as showing their willingness to accept whatever disciplinary action the club deemed “opportune.”
Tchouaméni was back training with Madrid on Friday, two days before they play at Barcelona in a clasico. Madrid has to win otherwise Barcelona will be crowned La Liga champion.
After being notified of the fine, he posted a public apology to the club and its fans on social media.
“What happened this week in training is unacceptable,” Tchouaméni wrote. "I say this while thinking about the example we are expected to set for young people, whether in football or at school.
“Above all, I am sorry for the image we projected of the club.”
Valverde was not at practice due to the head knock.
Both players are set to play in the World Cup next month, with Tchouaméni playing for France and Valverde for Uruguay.
Chaotic end to a poor season
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The run-in between the players, who for seasons have played side by side in Madrid's midfield, came after they argued this week in previous training sessions. But tempers boiled over on Thursday. Spanish media was rife with reports that the players previously disagreed over the club's decision to let coach Xabi Alonso go after just months on the job.
It was not the only altercation involving Madrid players during training this week. Álvaro Carreras confirmed he was in a “minor” incident with a teammate. Spanish media said he and fellow defender Antonio Rüdiger got into a scuffle.
Álvaro Arbeloa, the coach who was promoted from Madrid's reserve team when Alonso was fired in January, will face tough questions on what went wrong inside the changing room when he gives a press conference on Saturday ahead of the clasico at Camp Nou.
Madrid is facing a second consecutive campaign without a major trophy amid rumors in the Spanish media that club president Florentino Pérez is considering bringing back Jose Mourinho to straighten out his underperforming team.
