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Oil jumps over 3% on US-Iran attacks; TSX futures edge higher

Oil jumps over 3% on US-Iran attacks; TSX futures edge higher
Energy · 2026
Photo · Priya Raman for Daily Digest Invest
By Priya Raman Macro & Economy Aug 31, 2026 3 min read

Oil prices climbed more than 3% on renewed US-Iran attacks tied to the strategic Strait of Hormuz, and that strength helped push Canada's TSX futures slightly higher. The move comes as investors also juggle shifting expectations for US interest-rate cuts and a looming decision from the Bank of Canada.

What happened

According to Reuters, fresh US-Iran attacks in the Strait of Hormuz—a narrow waterway that carries a significant share of the world's oil—sent crude prices sharply higher. The Strait of Hormuz is a critical chokepoint for global energy supplies, and any disruption there tends to rattle markets because it can threaten the flow of oil from major producers in the Middle East.

The more than 3% jump in crude was enough to give a modest lift to Canada's TSX futures, as energy stocks are a heavy weight in the Canadian benchmark index. When oil prices rise, Canadian energy producers often see their shares move higher, which can drag the whole index up with them.

Why it matters for investors

For everyday investors, the immediate takeaway is that geopolitical tensions can have a direct impact on your portfolio, especially if you hold energy stocks or funds with exposure to the sector. But the ripple effects go beyond oil companies. Higher crude prices can feed into inflation, which in turn influences central bank policy.

That's why traders are also paying close attention to the Federal Reserve. The brief notes that investors are weighing shifting odds for Fed rate cuts. If oil keeps rising, it could keep inflation elevated, making the Fed less likely to cut rates soon. That would be a headwind for stocks broadly, as higher interest rates tend to make borrowing more expensive and can slow economic growth.

At the same time, Canada's own central bank is set to make a decision. The Bank of Canada has been navigating a similar inflation and growth puzzle, and its choice will directly affect Canadian mortgage rates, borrowing costs, and the loonie. For Canadian investors, this decision is just as important as what the Fed does.

What to watch next

Investors will be watching whether the US-Iran situation escalates or de-escalates. Any further attacks could push oil even higher, while a de-escalation might see prices give back some of those gains. Also on the radar: the Fed's next policy meeting and any commentary from officials that could clarify the path for rates.

For those with a diversified portfolio, the key is to remember that short-term geopolitical spikes are common. Energy prices can be volatile, and while they can boost certain sectors, they can also create uncertainty for the broader market. Keeping a long-term perspective and not overreacting to daily headlines is often the most sensible approach.

In related news, oil prices have been sensitive to US-Iran tensions in recent sessions, and energy stocks have been a focus in other markets as well. Meanwhile, Canada's TSX has shown resilience even when economic data is mixed, and strong GDP growth earlier this year provided some support.

As always, keep an eye on your own investment goals and risk tolerance. Events like these are part of the normal ebb and flow of markets, and staying informed is the best way to make confident decisions.

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