How the 2026 Iran war moved oil, bonds, and the value of your Waterloo Region property

When the United States went to war with Iran and the Strait of Hormuz, which as every school child now knows, carries nearly a fifth of the world's oil, fell into crisis, the repercussions did not stay in the Gulf. It ran through oil prices into inflation and the bond market, and landed squarely on mortgage rates and home values right here in Waterloo Region.

Now, I don't want to be overly dramatic.  The US's current middle eastern romp has not cost you hundreds of thousands or dollars, but in this real estate market, it hasn't helped things.  The following is a brief look at how exactly it doesn't help followed by an examination of previous oil shocks and what they can teach us.

It started with oil

In March 2026, fighting in the Gulf and a partial closure of the Strait of Hormuz sent crude prices vertical. Dubai crude reached a record near US$166 a barrel on March 19, and North American benchmarks pushed well above US$130. For a few tense weeks, the world was paying wartime prices for energy.

Diplomacy then changed the picture. On June 17, the United States and Iran signed a framework agreement to wind down the war, with a 60-day roadmap toward a final deal. Iran agreed to reopen the Strait, the naval blockade began to lift, and prices fell back fast. By late June, crude had returned to about US$77 a barrel, not far above where it began.

Where things stand today (August 5, 2026): the story is not over. After settling toward its pre-war level in June, oil has climbed again and is trading around US$76 a barrel for North American crude, with Brent near US$84. The reason is that the Strait of Hormuz is effectively closed to normal commercial shipping once more, with cargoes moving in naval-escorted convoys. There is a diplomatic path: Iran and Oman are making progress on a deal to reopen the Strait, with Iran weighing a proposal to let European countries clear mines from the channel. But as of today the Strait is not open in any normal sense, and every flare-up nudges oil, and the risk premium in bond markets, back up. The takeaway is unchanged: it is the duration of this disruption, not the size of any single spike, that will decide how much it touches home.

From a barrel of oil to your mortgage payment

Here is the part many people miss. Higher oil prices feed straight into inflation, because nearly everything we buy has to be moved, heated, or manufactured using energy. As inflation expectations rise, bond investors demand a higher return, and the yield on the 5-year Government of Canada bond climbs.

That bond yield is the key to real estate. Canadian fixed mortgage rates are priced almost directly off the 5-year Government of Canada bond, plus a lender spread of roughly one to two percent. So when geopolitical fear lifts bond yields, your fixed mortgage rate follows, even if the Bank of Canada never touches its own rate.

As of early August 2026, the Bank of Canada has held its policy rate at 2.25% for a sixth straight meeting, choosing to look through the war's temporary effect on energy prices. The 5-year bond yield sits near 3.2%. Here is the encouraging part: as the initial oil panic premium leaked out of the market over the summer, the best 5-year fixed mortgage rates fell from about 5.0% to roughly 4.0%. The chart below shows how those pieces fit together, and why your fixed rate can move even when the Bank of Canada does not.

What history tells us about oil shocks

You asked whether there is a pattern across previous wars and oil shocks. There is, and it genuinely helps to put the present moment in perspective.

Looking back more than fifty years, every major oil shock has opened the same way: a sudden supply scare and a sharp price jump. The 1973 OPEC embargo roughly quadrupled the price of oil. The 1979 Iranian Revolution more than doubled it, and Iraq's 1990 invasion of Kuwait nearly tripled prices within weeks. Oil reached its all-time high near US$147 in 2008, and Russia's 2022 invasion of Ukraine pushed it back above US$130.

The spike, though, is not the part that matters most. The historical record is clear that the real damage depends on how long a shock lasts. The prolonged crises of the 1970s, when oil stayed high for a year or more, produced persistent inflation, much higher interest rates, and deep recessions. The 1990 Gulf War spike was alarming but brief, and once it was clear that supply was not permanently lost, prices retreated and the lasting harm was modest.

On that scale, the 2026 conflict has been a middle case. The first spike faded within about three months and fixed mortgage rates actually eased, which is why the Bank of Canada has felt able to hold rates steady. But the war is now more than five months old, the Strait of Hormuz has been disrupted again, and oil has climbed back in early August. The longer this drags on, the more it starts to resemble the prolonged shocks that did real damage, which is exactly why it is worth watching closely rather than assuming the all-clear.

What this means if you own your home

For homeowners and buyers in Waterloo Region, there is real good news buried in all of this. As the first oil spike faded over the summer, the best 5-year fixed mortgage rates actually fell, from about 5.0% to roughly 4.0%, easing the affordability squeeze. Local prices had already softened before the war and remain balanced rather than overheated, so buyers have more room than they have had in years, even as the renewed tension in the Strait is a reminder that rates could firm up again if oil stays high.

In July 2026, the average Waterloo Region home sold for $706,622, down about 3.8% from a year earlier, while the median eased to $675,000. Sales ran at 581 for the month with about 3.9 months of supply, and for the first time since February the average home sold just below its list price. That is balanced territory tilting slightly toward buyers, who have more room to negotiate than they have had in years. Notably, buyer traffic is near record highs, so the demand is there, waiting for prices or fixed rates to give a little more ground.

What this means if you are a landlord or investor

For investors, the story runs a little deeper, because financing cost is the lever that moves your returns the most. A short oil shock that does not push rates higher is good news for cash flow. But the episode is a useful stress test of how sensitive your numbers are to interest rates.

Consider a $600,000 mortgage on a rental property. At the pandemic-era low near 2%, the monthly payment was roughly $2,540. With 5-year fixed rates now near 4%, that same loan costs about $3,170 a month. That is down from roughly $3,500 when fixed rates were near 5% earlier this year, a real improvement for cash flow, but still well above the pandemic lows, and it is why the direction of the 5-year bond yield deserves a permanent place on your dashboard, especially with the Strait of Hormuz unsettled again.

The bottom line

A war in the Middle East really can change the value of your home in Waterloo Region, through the chain of oil, inflation, bond yields, and mortgage rates. History offers some comfort: it is the duration of an oil shock, not the size of the initial spike, that does the lasting damage. So far the 2026 conflict has been survivable. Fixed mortgage rates have actually eased to around 4%, the Bank of Canada has held steady at 2.25%, and our local market remains balanced. But with the Strait of Hormuz disrupted again and oil climbing back in early August, this is a story that is not over, and one worth watching through the fall.

The smartest response is not to react to headlines, but to understand the machinery behind them, and to make sure your own mortgage, purchase, or investment can withstand the next shock, whenever and wherever it comes.

Thinking about buying, selling, or reviewing your investment property?

I help residential clients and landlords across Waterloo Region make confident decisions in any market. Let's talk about what these trends mean for your specific situation.

Terry Riddoch, Real Estate Broker (Multifamily and Investment Properties, Ontario)

519-591-1725  |  [email protected]  |  www.terryriddoch.ca

Sources

• Strait of Hormuz crisis and the March 2026 oil spike: 2026 Strait of Hormuz crisis (Wikipedia).
• U.S.-Iran peace framework, June 17, 2026: Al Jazeera.
• Oil prices easing after the deal (late June 2026): CNBC.
• Strait of Hormuz status and oil price as of July 7, 2026: CNBC.
• Oil price as of August 5, 2026: Fortune.
• Iran-Oman talks to reopen the Strait (August 2026): The Boston Globe.
• Bond yields and how they set fixed mortgage rates: True North Mortgage.
• Bank of Canada policy rate held at 2.25% (sixth consecutive hold, July 15, 2026): Bank of Canada.
• 5-year Government of Canada bond yield: WealthNorth and
• Bank of Canada selected bond yields.
• 5-year fixed mortgage rates (now near 4.0%): Ratehub.
• Waterloo Region residential statistics (July 2026, ITSO / InfoSparks local MLS data): WOWA Kitchener-Waterloo-Cambridge market report.
• 1973 oil shock: Federal Reserve History.
• Duration of oil shocks and economic impact: James D. Hamilton, Historical Oil Shocks (UC San Diego).
• Historical oil price levels (2008, 2022): Price of oil (Wikipedia).