The Probable Impact of an Iran War on the U.S. Housing Market

The Strait of Hormuz: A Chokepoint That Controls Your Rate

About 20% of the world's oil passes through the Strait of Hormuz. Iran controls one side of it. In a conflict scenario, Iran's most powerful weapon isn't missiles — it's the ability to close or restrict that strait.

But here's the scenario that concerns me more: what if Iran doesn't close it entirely, but instead demands that oil transactions passing through be settled in Chinese Yuan instead of U.S. dollars? Analysts at South China Morning Post have already explored this scenario, though most urge caution about how realistic it is in the near term.

This isn't science fiction. Iran and China already conduct significant bilateral trade in Yuan. Saudi Arabia has openly stated it is open to petroyuan deals. Russian oil has reportedly been settled in Yuan with Indian refiners. The infrastructure exists.

If Iran successfully enforces Yuan-based settlements on even a fraction of Hormuz traffic, it strikes at the foundation of the petrodollar system — the arrangement since 1974 that has required countries to hold U.S. dollars to buy oil, keeping global demand for dollars artificially high. S&P Global has analyzed exactly this risk in the context of Saudi-China energy ties.

Why This Keeps Mortgage Rates High

Here's where it hits your monthly payment.

The U.S. dollar's global reserve status allows America to borrow cheaply. When that status is threatened, foreign demand for U.S. Treasury bonds weakens. When Treasury demand weakens, yields rise. And mortgage rates in the U.S. are directly tied to the 10-year Treasury yield.

At the same time, an Iran conflict would spike oil prices. Higher oil means higher transportation costs, higher manufacturing costs, higher food prices — in short, more inflation.

The Federal Reserve has one tool against inflation: raise rates, or keep them high. But here's the trap:

If the Fed raises rates to fight oil-driven inflation, mortgage rates go higher. Housing becomes less affordable. Use our home affordability calculator to see how even a 0.5% rate increase affects how much house you can qualify for.
If the Fed cuts rates to stimulate the economy during a war slowdown, it risks hyperinflation — pumping cheap money into an economy already strained by energy shocks.

This is why I believe an Iran conflict doesn't give the Fed a clear exit. They're boxed in. The most likely outcome is rates staying elevated for longer than anyone currently expects. The Carnegie Endowment has documented how Russia's yuanization of energy trade sets a precedent that other sanctioned nations, including Iran, are watching closely.

A common assumption is that rates fall during economic downturns — but 2008 is no longer the right playbook. In 2008, the Fed could cut aggressively because the dollar's global dominance was unchallenged and inflation was collapsing. That luxury no longer exists if the dollar's reserve status is under active threat. Cutting rates while the petrodollar is being challenged would flood a weakening dollar with cheap money — a near-perfect recipe for hyperinflation. In this scenario, an economic slowdown and high mortgage rates could exist simultaneously. Don't assume a recession means relief at the closing table.

What This Means for the Housing Market

Home prices may hold or rise — not fall.

I know that's counterintuitive. But consider: war tends to increase government spending, which adds money to the economy. Simultaneously, supply chain disruptions raise the cost of building materials — lumber, steel, copper wiring. New construction slows. Existing inventory stays tight.

High rates suppress transactions, not necessarily prices. We saw this from 2022 to 2024 — rates doubled, but home prices in most markets barely budged because sellers refused to give up their 3% locked-in mortgages.

If you already own a home, run the numbers before making any move. Our mortgage refinance calculator can tell you whether refinancing makes sense at current rates, and our extra payment calculator can show you how to pay down your balance faster while rates are high.

The buyers most at risk are those waiting on the sidelines. If you're holding off for a 5% rate that never comes, you may eventually buy at a 7.5% rate with a higher home price. Plug your numbers into our PITI mortgage calculator to see what different rate scenarios actually cost you per month.

The Dollar's Long Game

I want to be careful here — the petrodollar isn't dying tomorrow. The U.S. still has the deepest capital markets, the strongest military, and decades of institutional trust behind the dollar. The National Interest argues the petrodollar's end is overstated, and there's merit to that view.

But Iran reportedly pushing Yuan settlements at Hormuz isn't a crazy scenario — it's a pressure point that accelerates existing trends. De-dollarization through a petroyuan is a real structural risk analysts are tracking. Every barrel settled in Yuan is one less barrel keeping dollar demand artificially elevated.

For homebuyers, the practical message is this: the era of historically low mortgage rates (2010–2021) was an anomaly, not a norm. Geopolitical pressures are one more reason it's unlikely to return soon.

What Should You Do?

Stop waiting for 3–4% rates. Use our affordability calculator to plan your budget around 6–7% and treat anything lower as a bonus. You can always refinance if the rate go down! But if they go up, you are losing for long term.
Know your true break-even. If you're considering refinancing, our refinance calculator shows your exact break-even month.
Lock early if you find a home you can afford. Rate locks have rarely been more valuable than in an uncertain geopolitical climate.

The housing market doesn't exist in a vacuum. What happens in the Strait of Hormuz can move your monthly payment. That's not alarmism — it's the reality of a globally connected economy.