The U.S. and Iran announced an initial peace agreement earlier this week, and formal signing is set for Friday in Geneva, Switzerland.
The Strait of Hormuz, which is the narrow waterway that carries roughly 20% of the world’s oil, is set to reopen. As a result, West Texas Intermediate (WTI) crude oil has already fallen nearly 40% from its wartime peak of approximately $119 per barrel, sliding to around $75 per barrel as of this writing.
What could these latest geopolitical updates mean for the forex market, overall sentiment, and your trades? Let’s break it all down.
Why Do Markets Care So Much About Hormuz?
The Strait of Hormuz is a narrow channel between Iran and Oman connecting the Persian Gulf to the open ocean. It’s the only maritime exit for oil exports from major Gulf producers including Saudi Arabia, Iraq, and the United Arab Emirates.
When the U.S.-Israel conflict with Iran began in late February 2026, Iran effectively closed the strait, so crude oil prices spiked more than 55% from approximately $67 per barrel to nearly $120 per barrel at the peak — one of the largest monthly oil price surges on record.
That’s the supply shock in raw numbers. Higher oil meant higher fuel costs globally, which fed into inflation, which put central banks under pressure, which rippled into every currency pair on your screen.
Now the deal is being signed on Friday. Mines need to be cleared. Hundreds of stranded ships need to exit the Gulf. Production that was shut in needs time to restart. The physical oil isn’t actually flowing yet. But prices have already moved because expectations moved first.
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Why Is Oil Tumbling Already?
This is the “buy the rumor, sell the news” principle in action.
You see, markets are forward-looking. Traders and institutions don’t wait for events to be confirmed before they position. When credible news of a U.S.-Iran deal started surfacing, oil traders began selling their long positions (bets that oil would stay high), anticipating that supply would eventually return to the market. Prices started falling days before any ink hit paper.
By the time the formal signing happens Friday, much of the “oil supply coming back” narrative will already be baked into the price. The event itself may even trigger a “sell the news” dip, where assets that rallied on rumor give back gains once the rumored event finally arrives because the easy money has already been made.
However, it’s important to note that even after signing, the physical supply restoration could take months. Analysts say that mine clearing alone may take up to six months, and restarting shut-in production in countries like Iraq could take even longer.
The key takeaway from this is that price is usually a reflection of expected future conditions, not current ones. Understanding what is “priced in” versus what is genuinely new information is one of the most valuable skills a trader can develop.
What Does This Have to Do with USD/CAD?
Canada is one of the world’s largest oil producers and exporters, with the United States as its primary customer. This makes the Canadian dollar (CAD) what traders call a petrocurrency: a currency whose value is heavily tied to the price of a commodity, in this case crude oil.
The mechanism works like this:
Oil prices rise → Canada earns more revenue from exports → more demand for Canadian dollars to pay for that oil → CAD strengthens → USD/CAD falls (because you need fewer USD to buy one CAD)
Oil prices fall → Canadian export revenues shrink → less demand for CAD → CAD weakens → USD/CAD rises
During the height of the conflict, when WTI was near $119, the CAD received support from elevated oil revenues. As peace deal expectations took hold and crude began selling off toward $75, that support eroded. As of June 17, USD/CAD was trading around 1.4000 levels — nearly a one-month high for the pair, reflecting a weakened Loonie against a strengthening U.S. dollar.
Notice the double pressure on CAD right now: oil is falling AND the U.S. dollar is strengthening (thanks to the Fed’s hawkish dot plot from Wednesday’s FOMC meeting). USD/CAD is absorbing hits from both sides simultaneously.
Multiple forces are layered on top of each other for USD/CAD, and understanding which force is dominant in a given moment is part of what separates experienced traders from beginners.
What Does This Mean for Markets Going Forward?
The oil-to-currency transmission chain doesn’t stop at USD/CAD. Lower crude prices have broader implications:
Inflation expectations ease. Oil is an input cost for almost everything — transportation, manufacturing, food production. A sustained decline in crude prices likely feeds into lower headline inflation over time. For central banks still fighting elevated price pressures (the Fed, the Bank of England, the European Central Bank), that’s potentially good news — it may reduce pressure to hike rates further.
Commodity currencies feel the squeeze. Beyond CAD, currencies like the Norwegian krone (NOK) and, to a lesser extent, the Australian dollar (AUD) tend to track commodity cycles. A structural shift lower in oil could weigh on these pairs as well.
The pace of physical recovery matters. Markets have priced in a supply normalization. If the physical reopening of the Strait of Hormuz hits serious delays — uncleared mines, renewed tensions, slow production restarts — oil could partially bounce back. That would reverse some of the CAD pressure and unwind part of the “sell the news” dynamic.
Right now, the Loonie is caught between two competing forces: the relief of a potential oil supply normalization pulling one way, and a strong U.S. dollar (courtesy of the Fed’s hawkish stance) pulling the other. Neither story is finished yet.
The Bottom Line
- Geopolitical events move markets through expectations, not just actions. The Strait of Hormuz closure spiked oil prices; the peace deal started unwinding them — weeks before any oil physically moved. Price is always a story about the future.
- Buy the rumor, sell the news” is real. WTI crude fell nearly 40% from its peak even before the deal was signed, because markets priced in the outcome in advance. The formal signing on Friday may produce a muted or even inverted price reaction.
- USD/CAD is a live lesson for commodity currency mechanics. When oil falls, CAD tends to weaken, and USD/CAD tends to rise. Watch this pair as the Hormuz reopening story develops — the correlation won’t be perfect, but the logic behind it is one of the foundational ideas in forex.
- Multiple drivers matter. CAD is currently pressured by both falling oil and a stronger U.S. dollar from the Fed’s hawkish dot plot. Real market moves almost always have more than one cause.
- Physical reality will eventually reassert itself. Markets are forward-pricing a supply normalization that could take months to materialize. The gap between market expectations and physical oil flows is worth watching — it’s where the next surprise, in either direction, may come from.
What to Watch Next
Friday, June 19: Formal U.S.-Iran peace deal signing in Geneva. Watch WTI crude for a “sell the news” reaction and monitor USD/CAD for follow-through on CAD weakness or a reversal if the signing produces complications.
Ongoing: Mine-clearing progress and ship transit updates from the Strait of Hormuz. Any credible delay in physical reopening may partially reverse oil’s decline and provide CAD some relief.
Bank of Canada communications. As oil’s trajectory becomes clearer, watch for any shift in the Bank of Canada’s tone on inflation and rates. That could be the next transmission belt for USD/CAD direction.
This article explains how the U.S.-Iran peace deal is sending oil prices lower and putting pressure on the Canadian dollar, and if the oil-to-currency transmission chain is new to you, our lesson breaks it down. Premium members can read our lesson:
📖 How Oil Moves with USD/CAD, USD/NOK, and CAD/JPY
Reading this helps you understand why CAD is considered a petrocurrency, how oil price swings translate into USD/CAD direction, and why each oil-linked pair reacts differently to the same crude move.
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