Indian equity benchmarks experienced a significant downturn on Monday, September 28, 2026, as investor sentiment was heavily impacted by a confluence of global factors. The 30-share BSE Sensex tumbled 1,124.02 points, or 1.52 per cent, to settle at 72,771.72. Similarly, the NSE Nifty50 index declined 360.25 points, or 1.56 per cent, closing at 22,780.25.
Rising Crude Prices and Geopolitical Tensions Drive Sell-Off
The primary catalyst for the widespread selling pressure was a sharp increase in crude oil prices. Brent crude oil surged more than 4 per cent during the session, topping $108.64 per barrel, following reports that US President Donald Trump rejected Iran's latest peace proposal. This development heightened concerns about escalating tensions in West Asia, which could lead to prolonged supply-side disruptions and further elevate commodity prices.
Beyond oil, elevated global bond yields and persistent outflows from foreign funds also weighed heavily on the market. The India VIX, a gauge of expected market volatility, spiked 12.54 per cent to 13.69, reflecting increased investor caution. The combined market capitalisation of BSE-listed companies saw a substantial reduction of approximately Rs 7.41 lakh crore in a single session.
Broader Market and Expert Outlook
The selling pressure was not confined to large-cap stocks; the broader market also felt the brunt. The Nifty Midcap100 slumped 1.63 per cent, and the Nifty Smallcap100 declined 1.85 per cent. Sectors across the board were affected, with banks emerging as a key drag on the domestic market.
Vinod Nair, Head of Research at Geojit Investments, commented, "Bears remained firmly in control as the market breached a key psychological support level, reflecting growing investor caution amid deteriorating global macro conditions. The US rejection of the ceasefire proposal has heightened concerns that tensions in West Asia could persist for longer than anticipated, reducing the likelihood of a near-term diplomatic resolution and increasing the risk of prolonged supply-side disruptions and higher commodity prices."
Nair added that rising US bond yields are narrowing the India-US yield spread, potentially leading to foreign fund outflows and keeping market sentiment cautious. Market participants are also anticipating the upcoming RBI policy decision, with global liquidity, bond yield movements, and oil prices expected to drive sentiment.
Ankur Punj, Managing Director at Equirus Wealth, echoed these sentiments, stating that the bleak geopolitical situation amid the escalating US-Iran conflict triggered a broader sell-off. He noted that with US bond yields already above 5 per cent and little respite from overseas fund outflows, the market undertone is likely to remain cautious with a negative bias in the near to medium term.
Nifty Technical Outlook
Rupak De, Senior Technical Analyst at LKP Securities, provided a technical perspective: "Bears continued to strengthen as the selling pressure intensified, dragging Nifty decisively below the 23,000 mark. The index extended its decline below the recent swing low, reinforcing the prevailing bearish structure. Sentiment remains extremely weak." He identified immediate support for Nifty at 22,650–22,700, with 23,000 acting as a strong resistance level.