Sensex, Nifty slide 1% as US-Iran talks fail, oil above $100

What happened in the market on Monday

Indian benchmark indices ended lower on Monday, snapping the strong momentum seen in the previous session. The BSE Sensex fell 702.68 points, or 0.91 per cent, to close at 76,847.57. The NSE Nifty declined 207.95 points, or 0.86 per cent, to finish at 23,842.65. The sell-off was linked to a jump in risk aversion after US-Iran negotiations failed, raising fears of a prolonged conflict and higher crude oil prices, according to PTI. Heavy losses were seen in auto, IT and energy-related names.

Intraday swing: a deeper cut before partial recovery

The decline was sharper earlier in the day before a late recovery reduced the damage. The Sensex fell as much as 1,681.93 points during intraday trade, taking it down to 75,868.32. That intraday move translated to a drop of 2.16 per cent from the previous close before buyers stepped in. The Nifty also pared losses into the close. The session highlighted how quickly sentiment can shift when geopolitics starts influencing commodity prices and risk premia.

The trigger: failed US-Iran talks and crude above $100

Market participants tracked developments after the breakdown of US-Iran peace talks and related headlines around the Strait of Hormuz. Vinod Nair, Head of Research at Geojit Investments Limited, said crude prices moved above USD 100 per barrel after the talks broke down and a US naval blockade in the Strait of Hormuz was announced. He added that elevated oil prices were increasing concerns around inflation, currency stability and broader macroeconomic balances. Ajit Mishra, SVP, Research at Religare Broking, also linked the day’s weakness to escalating geopolitical tensions and a sharp spike in crude, as reported by PTI.

Volatility rises as uncertainty returns

The jump in volatility was visible in derivatives indicators. The India Volatility Index rose to 20.5 from 18.8 on Friday. That move signalled higher near-term uncertainty priced by the market, consistent with the sharp intraday fall and sector-wide selling. Investors also weighed whether the earlier relief rally had run too far given the fresh geopolitical risk.

Stocks in focus: laggards and gainers on Sensex

Among the 30 Sensex companies, the biggest laggards included Maruti, InterGlobe Aviation, Bajaj Finance, Reliance Industries, Tata Consultancy Services and HDFC Bank. On the other hand, ICICI Bank, NTPC and Axis Bank closed higher. Reuters also reported that Reliance Industries dropped 2.6 per cent after the government raised export duty on diesel and aviation turbine fuel. In addition, tourism, paint and refiners fell as investors assessed the impact of higher crude prices on margins.

Sector picture: autos lead declines, defensives hold up

Sectoral performance showed pressure in areas most sensitive to fuel costs and global risk-off moves. Auto declined the most, down 2.10 per cent. It was followed by Energy (1.34 per cent), Services (1.31 per cent), Oil and Gas (1.25 per cent), Consumer Discretionary (1.21 per cent), IT (1.17 per cent) and BSE Focused IT (1.02 per cent). Telecommunication, Utilities and Power were the gainers, reflecting selective rotation rather than uniform selling.

Broader market breadth: more losers than gainers

The broader market also ended in the red. The BSE MidCap Select index fell 0.82 per cent, while the SmallCap Select index declined 0.33 per cent. Market breadth on the BSE tilted negative, with 2,573 stocks declining, 1,790 advancing and 201 remaining unchanged. The breadth numbers indicated that weakness was not limited to a handful of index heavyweights.

What fund flows and last week’s rally suggest

Foreign Institutional Investors (FIIs) were net buyers on Friday, purchasing stocks worth Rs 672.09 crore, according to exchange data. The sell-off came after a strong previous session when the Sensex rose 918.60 points to 77,550.25 and the Nifty climbed 275.50 points to 24,050.60. Reuters also noted that equity benchmarks had risen about 6 per cent last week, marking their strongest weekly performance in more than five years, as investors took comfort from a fragile US-Iran ceasefire framework. Arun Malhotra of CapGrow Capital told Reuters that it may be unfair to expect a deal in one sitting, and he pointed to last week’s recovery as a sign that markets had already priced in part of the bad news unless there is a significant escalation.

Key numbers at a glance

What investors will watch next

The immediate market focus remains on oil prices, developments linked to the US-Iran standoff, and how quickly risk premium stabilises. Any sustained move higher in crude can keep inflation and currency concerns in the foreground, particularly for sectors with direct fuel sensitivity. Investors will also track whether volatility stays elevated after the VIX jump. Separately, markets were scheduled to remain closed on Tuesday for Baba Saheb Ambedkar Jayanti.