Nifty50, Sensex tumble as US-Iran conflict, oil surge fuel market selloff

Markets bounce back smartly once conflicts get over
An investment strategist's historical perspective on why long-term investors should stay the course during geopolitical turmoil.

On March 12, 2026, India's financial markets absorbed another blow as the widening conflict between the United States and Iran sent crude oil prices surging toward $100 per barrel, pulling the Nifty50 and BSE Sensex down by roughly one percent each. The decline was not merely a number — it was a signal of how deeply geopolitical tremors in West Asia can travel, arriving uninvited on the trading floors of Mumbai. Foreign investors, reading the uncertainty, continued their quiet but consequential exit, leaving domestic institutions to hold a line they could not fully defend. In moments like these, markets do not so much crash as they recede, waiting for the world to settle.

  • Crude oil's march back toward $100 per barrel — fueled by an intensifying US-Iran war — struck Indian equities at the opening bell, with the Sensex shedding over 900 points before partially recovering.
  • Foreign portfolio investors pulled Rs 6,267 crore out of Indian markets in a single session, a pace of withdrawal that domestic buyers, despite deploying Rs 4,966 crore, simply could not match.
  • Global markets compounded the pressure: US stocks fell, Asian indices extended a volatile week, and even a strategic release of government crude reserves failed to arrest rising oil prices.
  • Gold slipped as the dollar strengthened, completing a picture of broad dislocation — oil up, equities down, foreign capital in retreat, and safe-haven dynamics reshaping portfolios worldwide.
  • Analysts see no immediate floor while West Asia remains at war, but counsel patience — history shows markets tend to recover sharply once geopolitical conflicts resolve, rewarding those who stayed invested.

The Indian stock market walked into Thursday under heavy pressure. The Nifty50 closed at 23,639.15, down 228 points, while the BSE Sensex finished at 76,034.42, shedding 829 points — both indices weighed down by the escalating US-Iran conflict and crude oil prices pushing back toward $100 per barrel.

Beneath the headline numbers, a telling imbalance was at work. Foreign portfolio investors offloaded Rs 6,267 crore worth of Indian equities, while domestic institutional investors absorbed Rs 4,966 crore — a meaningful effort, but not enough to offset the outflow. Overseas money was leaving faster than local money could arrive.

Dr. VK Vijayakumar of Geojit Investments described the market as having entered a weak zone. With the war showing no signs of resolution and Brent crude back in triple-digit territory, he expected the pressure to persist. Foreign investors, he noted, had simply stopped reversing course in the face of global uncertainty.

The stress was not confined to India. US markets had already fallen as investors looked past a mild inflation reading and focused instead on West Asia. Asian markets followed. Even coordinated releases of strategic oil reserves failed to cool prices. Gold dipped as the dollar strengthened — a classic flight-to-safety rotation that left few corners of the market unaffected.

Yet Vijayakumar offered perspective alongside the caution. Markets have historically bounced back sharply once geopolitical conflicts ease. For long-term investors, he argued, this was a moment for temperament — staying invested, continuing systematic plans, and selectively accumulating quality blue-chip stocks. The market, he suggested, was posing a test of nerve, not delivering a final verdict.

As Dalal Street closed, the central question was not whether the selling would stop, but when — and whether the domestic buyers holding the line would ultimately be proven right.

The Indian stock market opened Thursday morning into a wall of selling. By the time the opening bell had finished ringing, the Nifty50 had already dipped below 23,600. The BSE Sensex was down more than 900 points. By day's end, the damage was measured in fractions: Nifty50 closed at 23,639.15, having shed 228 points or 0.95 percent of its value. Sensex finished at 76,034.42, down 829 points or 1.08 percent. The culprits were familiar by now—the escalating conflict between the US and Iran, and crude oil prices climbing back toward the $100-per-barrel mark.

What made Thursday's decline particularly telling was the imbalance beneath the numbers. Foreign portfolio investors continued their retreat from Indian equities, offloading shares worth Rs 6,267 crore on Wednesday alone. Domestic institutional investors tried to plug the gap, buying Rs 4,966 crore worth of stock, but it wasn't enough. The math was simple and brutal: overseas money was leaving faster than domestic money could arrive.

Dr. VK Vijayakumar, Chief Investment Strategist at Geojit Investments Limited, framed the moment plainly. The external pressures had pushed the market into what he called a weak zone. With the war showing no signs of abating and Brent crude bouncing back to triple-digit territory, weakness would likely persist. The domestic buyers—DIIs—were showing up, but their purchases were being overwhelmed by the steady exodus of foreign capital. In an uncertain global environment, FIIs had simply stopped reversing course.

The broader context was global. US stocks had closed lower on Wednesday as investors looked past a relatively mild inflation report and instead fixed their attention on the widening hostilities in West Asia. Asian markets followed suit on Thursday, extending what had already been a volatile week. The private credit market was showing stress. Even the strategic release of crude oil from government reserves—an attempt to cool prices in the wake of the Iran conflict—had failed to hold the line. Oil kept climbing anyway.

Gold, by contrast, edged lower as the US dollar strengthened, a typical flight-to-safety dynamic that left precious metals under pressure. The picture was one of genuine dislocation: geopolitical risk pushing oil higher, oil pushing equities lower, foreign investors pulling out, and domestic buyers unable to absorb the selling.

Yet Vijayakumar offered a longer view. Markets, he noted, could be deeply frustrating in moments like these. But history suggested a pattern: once geopolitical conflicts resolved, markets tended to bounce back smartly. The lesson for investors was one of temperament. This was a time to stay invested, to continue systematic investment plans, and for long-term players, to use the weakness as an opportunity to accumulate high-quality blue-chip stocks across sectors. Portfolio churn in favor of quality names made sense. The market was offering a test, not a verdict.

As Thursday's session closed, the question hanging over Dalal Street was not whether the selling would stop, but when. Analysts expected volatility to persist as long as the West Asia conflict remained unresolved and crude oil prices remained elevated. The foreign investors had made their choice. The domestic buyers were waiting to see if they had made the right one.

External headwinds have pushed the market into a weak zone. With the war continuing to rage with no signs of let up and Brent crude again bouncing back to $100 levels, the weakness is likely to persist.
— Dr. VK Vijayakumar, Chief Investment Strategist, Geojit Investments Limited
Investors should remain invested and continue with systematic investment plans. Long term investors can use market weakness to slowly accumulate high quality bluechips across sectors.
— Dr. VK Vijayakumar, Chief Investment Strategist, Geojit Investments Limited
A Conversa do Hearth Outra perspectiva sobre a história
Inventor

Why did foreign investors pull out so much money on a single day—Rs 6,267 crore? That's a lot of conviction.

Model

It's not really conviction so much as fear. When geopolitical risk spikes and oil prices surge, foreign investors typically de-risk. They're managing exposure across multiple markets. India becomes less attractive when global uncertainty is high.

Inventor

But domestic investors were buying. Doesn't that suggest they saw value?

Model

It does, but there's a timing problem. Domestic investors are often longer-term holders. They see dips as opportunities. Foreign investors are often more tactical—they move faster, in bigger volumes. So you get this mismatch where the buyers and sellers are operating on different time horizons.

Inventor

The analyst mentioned that DIIs buying wasn't helping the market recover. That's counterintuitive, isn't it?

Model

Only if you think of buying and selling as equal forces. But when FIIs are selling in large volumes and moving quickly, domestic buying—even substantial buying—can't move the needle fast enough. It's like trying to fill a bathtub while the drain is open.

Inventor

So what changes this dynamic?

Model

The geopolitical situation has to stabilize. Once the Iran conflict shows signs of resolution, the fear premium comes out of oil prices. Oil comes down, the external headwind eases, and foreign investors start looking at valuations again instead of just managing risk.

Inventor

Is there anything else at play here—like the strength of the dollar?

Model

Yes. A stronger dollar makes emerging market assets less attractive to foreign investors. They're getting currency headwinds on top of geopolitical headwinds. Gold weakness is a symptom of that same dynamic—the dollar is winning the flight-to-safety trade.

Inventor

So for an investor sitting in India right now, what's the actual play?

Model

The analyst's advice was clear: if you're long-term, you stay invested and keep buying. You're buying at lower prices. If you're tactical, you're probably sitting in cash waiting for clarity on the conflict. The market is essentially saying it will recover once the uncertainty lifts—but nobody knows when that is.

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