How War Impacts Mortgage Rates — And Why the Iran War Is Different
By Stephan Wiederkehr | Finance West Lending, Inc. | March 2026
If you’ve been watching mortgage rates lately, you know the whiplash all too well. Just weeks ago, the 30-year fixed rate dipped below 6% for the first time since 2022 — then the U.S. and Israel launched strikes against Iran on February 28th, and rates reversed almost overnight. Here’s why.
How War Usually Moves Rates
When conflict breaks out, investors typically flee to U.S. Treasury bonds for safety. Rising bond demand pushes yields — and mortgage rates — down initially. But that rarely lasts. If the war drives inflation through higher commodity prices or defense spending, bond investors demand higher yields to compensate, and mortgage rates climb. Wars that stay contained create short-lived volatility. Wars that threaten the arteries of the global economy are a different story.
Why Iran Is Different: The Oil Factor
Most conflicts don’t directly control a significant chunk of the world’s oil supply. Iran does. The Strait of Hormuz carries roughly one-fifth of the world’s oil and a third of its fertilizer exports. When that chokepoint was effectively closed, it set off a chain reaction through energy markets, supply chains, food costs, bond markets — and yes, mortgage rates.
Mainstream estimates suggest that every sustained $10-per-barrel increase in oil prices can add roughly 0.3 percentage points to headline inflation. With oil surging $40+ above pre-war levels, we’re looking at more than a full percentage point of additional inflation pressure baked into the outlook. Goldman Sachs warned this week that inflation could snap back to 3% this year if the war drags on — a sharp reversal from earlier forecasts pointing toward 2%.
The result: the average 30-year fixed mortgage rate jumped to 6.11% in the week ending March 12th, the biggest weekly increase since the “Liberation Day” tariff shock last April.
What This Means for LA Buyers Right Now
Southern California buyers were just starting to feel relief as rates approached 6%. That window is narrowing. Higher consumer prices could discourage the Fed from cutting rates — or even prompt it to raise them — keeping the broader lending environment tight.
The one bright spot: markets reprice fast. A credible ceasefire or reopening of the Strait would send oil lower, ease inflation expectations, and pull mortgage rates back down — potentially quickly.
