Sensex falls 800 points, Nifty slips as oil surges on US-Iran ceasefire uncertainty

The BSE Sensex opened over 200 points lower and quickly extended losses to more than 800 points within the first hour of trade.

The NSE Nifty 50 also began the session on a weak note, slipping nearly 90 points at the open before falling over 150 points during early trade.

What triggered the fall?

The market downturn followed a sharp rebound in the previous session, as oil prices climbed to $97.35 per barrel, raising concerns over inflation and global supply disruptions.

Tensions escalated after Iran once again shut the Strait of Hormuz, a critical global oil transit route, signalling that the West Asia conflict remains far from resolved.

The move came just a day after Tehran had agreed to reopen the waterway as part of a two-week truce with the United States.

The renewed closure is being viewed as a response to ongoing Israel military operations in Lebanon.

‘US will remain in and around Iran’

Meanwhile, US President Donald Trump said American forces would remain deployed in and around Iran until Tehran fully complies with the ceasefire terms.

In a post on Truth Social, Trump said US military assets — including ships, aircraft, personnel, and additional weaponry — would stay in position to ensure enforcement of the agreement.

He warned that any violation could trigger a significantly stronger military response, while reiterating that the deal mandates no nuclear weapons development and ensures that the Strait of Hormuz remains open and secure.