The Sensex is down nearly 15% since January. The rupee is at an all-time low. Foreign investors have pulled out over ₹1 lakh crore this year alone. And the reason for all of it traces back to a strip of water 33 kilometres wide.
If you opened your investment app this morning and felt your stomach drop, you are not alone.
By 10:30am, the BSE Sensex had fallen 1,842 points nearly 2.5%. The Nifty slipped to 22,529. All 16 sectoral indices were in the red. Midcap and smallcap indices fell even harder, dropping over 3%. In a matter of hours, Indian investors had collectively lost close to ₹8 lakh crore in market value.
And none of your companies did anything wrong today.
So what happened?
The short answer is: Trump gave Iran a 48-hour ultimatum to reopen the Strait of Hormuz. Iran responded by saying the Strait is open but only to those who don't violate its soil. Both sides are technically not backing down. And markets, which hate uncertainty more than they hate bad news, went into full panic mode.
The Strait of Hormuz is a narrow chokepoint between Iran and Oman. About 20% of the world's oil passes through it every single day.
Since the US-Iran conflict erupted on February 27, that route has been partly disrupted. Brent crude the global benchmark has surged 55% in March alone. It was sitting at $113 a barrel this morning.
India imports about 85% of its crude oil. When oil crosses $100, India's import bill swells, the rupee weakens, and inflation rises all at the same time. Today, the rupee hit a record low of ₹93.94 to the dollar. That's the fifth record low in as many weeks. The RBI is burning through forex reserves trying to slow the fall, but it can only do so much.
Now here's the domino that most people miss.
1 Oil goes up → India's import bill explodes. The current account deficit widens. Rupee weakens.
2 Rupee falls → Indian stocks become less attractive to foreign investors. When they convert rupee returns into dollars, they get less. So they sell.
3 FIIs sell → ₹88,180 crore has already left Indian markets in March. ₹1.34 lakh crore has left in 2026 so far. When this much money exits, prices fall.
4 Domestic investors panic → Seeing the fall, retail investors sell too. Which pushes prices even lower.
This is the spiral. And India is currently inside it.
The one thing holding the market together right now is domestic institutional investors your mutual fund SIPs, your insurance premiums, your EPF contributions. DIIs have pumped over ₹2 lakh crore into Indian equities in 2026, quietly absorbing much of the FII selling. Without that, the fall would be considerably worse.
That one sentence is why markets haven't completely collapsed. It leaves a door open however narrow. Analysts are reading it as a signal that Iran isn't looking to fully shut down global oil supply. But "a door left open" is not the same as stability.
Morgan Stanley had predicted Sensex at 1,00,000 by end of 2026. It's now sitting at 72,740. Brokerages are quietly revising their year-end targets downward. One has already cut its Nifty target from 29,300 to 24,900.
The honest answer to "when does this end?" is: when the war de-escalates, or when crude stabilises, or when FIIs decide India is cheap enough to buy again. None of those things are on a predictable timeline right now.
In the meantime the SIP you set up quietly keeps running. The DIIs keep buying. And somewhere in the Gulf, two countries are still negotiating what a 33-kilometre strait is worth.
Until next time…
