Iran Ceasefire “Over” as Crude Oil Prices Spike and Stock Markets Drop

Renewed tensions between the U.S. and Iran have once again rattled global financial markets. After President Donald Trump declared the ceasefire agreement “over,” investors quickly shifted into defensive mode, sending crude oil prices sharply higher and pushing stock markets lower around the world.

The stock market and crude oil prices have been on a rollercoaster since the U.S. and Israel attacked Iran in late February. In the months that followed, crude oil prices jumped from around US$65.00 per barrel to more than US$120.00 per barrel. Thanks to strong first-quarter earnings season, the stock market ripped higher, hitting a record high on June 2.

What Happened to the Iran Ceasefire?

It appeared that an end to the Iran war was close with the U.S and Iran signing the Islamabad Memorandum to negotiate final peace terms on June 17. Oil prices drifted lower on the news to less than US$70.00 per barrel. Meanwhile, the stock market rebounded, closing in on its previous record high.

Unfortunately, the ceasefire didn’t last long. On July 6, the U.S. military attacked Iran, hitting more than 80 Iranian targets, after it accused Tehran of striking three ships in the Strait of Hormuz and reinstated sanctions on Iran’s oil. Iran responded by stating, “The era of bullying and extortion is over.”

President Trump responded on July 8, saying that Iran violates the ceasefire agreement every day and declaring the interim deal to be over, while threatening to attack Iran “hard.” The U.S. president noted that the two sides could still talk, but said that “it’s just a waste of time dealing with them,” adding, “They’re cuckoo.”

How the End to the Ceasefire Affected the Stock Market

Global markets responded as expected to the news of the ceasefire’s failure, with crude oil prices surging. Brent crude, the global benchmark, hit US$78.39 per barrel; its highest trading level since June 19. West Texas Intermediate, the North American benchmark, hit US$75.68; this was its highest trading level since June 18.

All three major U.S. stock indices took a hit, with the S&P 500, NASDAQ, and Dow Jones all trading lower. The Toronto Stock Exchange (TSX) was down more than one percent, hovering near a support level of 34,700.

While the vast majority of the stock market was in the red on July 8, the energy sector was up 1.6%. It’s still the top performing sector in 2026, advancing almost 24% and climbing 30% on an annual basis.

Meanwhile, the consumer defensive stocks that can be impacted by higher energy prices took a hit, as did the technology and basic materials sectors.

The latest escalation between the U.S. and Iran could prove to be an isolated event, with negotiators still able to reach a permanent deal in the near term. But the current escalations also show how quickly things can change for global stocks.

And even isolated events can have a big impact. Crude oil prices are still down from their US$120.00+ peak during the height of the war, but the recent jump has already introduced new inflation risk into the bond market. Wall Street analysts also believe the new U.S. Federal Reserve chair, Kevin Warsh, could announce an interest-rate hike as soon as October.

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