US 30-Year Mortgage Rate Drops to 6.47%, US-Iran Ceasefire Drives Treasury Yields Lower

Core Overview: The US mortgage market has ushered in a long-awaited breathing space. According to the latest data, as of June 18, 2026 (Q2 2026), the US 30-year fixed mortgage rate fell to 6.47%, down 5 basis points from 6.52% the previous week. This data not only ended the continuous upward trend in interest rates previously triggered by geopolitical risks, but also reflected the rapid pricing adjustments of the macroeconomic environment following the conclusion of unexpected events.

Key Details: Looking at detailed performance, in addition to the decline in the 30-year benchmark rate, the 15-year fixed mortgage rate, often used as a reference for refinancing, also slightly decreased to 5.81% from 5.84% last week. Furthermore, Freddie Mac Chief Economist Sam Khater pointed out that recent data, including a rebound in retail sales and a stronger pending home sales index, suggest that consumers in the real economy are showing resilience, and home-buying demand is showing signs of a mild recovery.

In-depth Attribution: The biggest driver of the downward trend in mortgage rates this week came from a significant pullback in long-term US Treasury yields. The Washington Post and market analysis pointed out that as the US and Iran officially signed a ceasefire agreement and planned to reopen the Strait of Hormuz, international oil prices, which had previously soared due to the war in the Middle East, plummeted in response. Cooling energy prices significantly reduced market fears of runaway inflation, thereby guiding the 10-year Treasury yield—the pricing benchmark for mortgage rates—lower, successfully offsetting some of the funding cost pressures brought about by tightening policies.

Outlook and Risks: Looking at the short term (1-2 months), with Middle East geopolitical alerts temporarily lifted, the restoration of the crude oil supply chain will help stabilize inflation. Mortgage rates are expected to fluctuate within the current range, providing an entry window for potential homebuyers and refinancing customers. However, from a medium-term perspective (3-6 months), the market is still full of variables. The new Federal Reserve Chair Kevin Warsh provided a "Hawkish Hold" guidance at the recent interest rate decision meeting, and some officials do not even rule out the possibility of further rate hikes within the year. If subsequent core inflation proves sticky, or if the implementation of the peace agreement falls short of expectations, mortgage rates may once again face upside risks.

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