‘A Slow-Motion Train Wreck’: Mortgage Rates Hit Their Highest Point in Nearly a Year as Iran War Drags On

The average 30-year fixed mortgage rate climbed to 6.85% on July 23, 2026, according to Mortgage News Daily’s daily index, up from 6.68% at the start of the prior week and the first time in 2026 that rates have run higher than the same point last year. Matthew Graham, chief operating officer of Mortgage News Daily, described the rise in Treasury yields as “a slow-motion train wreck playing out since March.” Mortgages track those yields, and the yields have been tracking a war.

From Ceasefire to Renewed Strikes

The conflict began when U.S. and Israeli forces launched large-scale strikes on Iran on February 28, 2026, and Iran retaliated against U.S. and regional targets. A 60-day U.S.-Iran memorandum of understanding in April 2026 briefly cooled things off. During that window, oil prices fell roughly 20% from their 2026 peak. That truce collapsed this month, with both sides trading renewed attacks, and markets have been repricing the risk ever since.

Oil moved first. Brent crude, which had touched $68.53 a barrel on July 2, 2026, rebounded to $86.99 by July 20. West Texas Intermediate settled at $84.38 per barrel. After the initial February strikes, Brent surged 10% to 13% to roughly $80 to $82 a barrel, and the International Energy Agency characterized the resulting disruption as the largest supply disruption in the history of the global oil market, largely because roughly 20% of global oil trade passes through the Strait of Hormuz.

The Bond Market Does the Rest

Higher oil feeds inflation expectations, lifting long yields. The 10-year Treasury yield, the benchmark most closely tied to mortgages, rose from 4.48% on July 1 to 4.71% on July 23, a 23 basis point move over three weeks. The 30-year yield rose from 4.97% to 5.17% over the same period. Gasoline has already reflected the shift: the national average sits at $4.00 per gallon as of July 20, 2026, up 3.8% on the week.

Mortgage rates had a different story only weeks earlier. The average 30-year fixed rate hit 6.55% in mid-July after renewed Iranian strikes rattled markets, itself a jump from ceasefire levels. Before the February strikes, rates had briefly dropped below 6% for the first time in four years.

A Housing Market Losing Altitude

The reversal is landing on a market that never fully recovered. Existing-home sales came in at 4.09 million (annualized) in June 2026, down 2.4% from May, in what FRED classifies as soft market territory. Sales hit a nine-month low after mortgage rates jumped back up toward 6.45% or higher. Consumer sentiment has followed the same trajectory, with the University of Michigan index at 44.8 in May 2026, down 5.0 points from April and deep in pessimistic territory.

Zillow (NASDAQ:Z | Z Price Prediction), which had forecast 4.3% growth in existing-home sales for 2026, cut that projection to 2.33% if elevated rates persisted through July 1, and warned of a possible 0.73% decline if rates stayed 50 basis points above the original trajectory alongside rising unemployment.

Zillow still expects rates to drift modestly lower to around 6.4% by the end of 2026, a forecast made before the ceasefire cracked. The signal to watch over the next two months is straightforward: whether the Strait of Hormuz stays open, and whether the 10-year yield tops 4.75%. Everything on a rate sheet keys off those two lines.

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