US mortgage rates edge higher on July 15 as 15-year fixed loans buck the trend

US mortgage rates moved generally higher on Wednesday, July 15, 2026, according to the latest data from the Zillow lender marketplace. The national average for the 30-year fixed-rate purchase loan rose by 4 basis points to settle at 6.46%, marking a slight increase from the previous day. This upward pressure was mirrored in other long-term products, with the 20-year fixed purchase loan climbing 13 basis points to 6.32% and the 5/1 adjustable-rate mortgage (ARM) purchase rate increasing by 8 basis points to 6.65%.

In contrast to the broader market trend, the 15-year fixed purchase loan declined by 6 basis points to 5.86%. This divergence highlights the varying dynamics across different loan terms, as shorter-duration fixed loans managed to shed cost while longer-term and adjustable products faced upward pressure. Zillow notes that these figures represent national averages rounded to the nearest hundredth, and actual rates can vary significantly depending on state-specific conditions and local cost of living factors.

The daily fluctuation occurs against a backdrop of shifting market activity over the past few months. Mortgage rates have decreased by more than half a point since the end of May 2026, a decline that has sparked a year-on-year surge of more than 62% in refinance applications. This increased activity suggests that borrowers have been actively responding to lower borrowing costs earlier in the year, although the recent uptick in rates may temper immediate refinancing enthusiasm.

Zillow’s data indicates that refinance rates are often higher than purchase rates, although this is not always the case. The divergence in today’s rates underscores the complexity of the current lending environment. While the 30-year fixed loan remains the most common product for its predictable payments, the 15-year fixed option continues to offer lower interest rates at the cost of higher monthly payments. Meanwhile, ARMs provide lower introductory rates but carry the risk of future rate uncertainty once the initial fixed period expires.

Market observers note that national averages can mask regional disparities, with rates in high-cost-of-living cities potentially running higher than the national benchmark. As borrowers navigate these conditions, the choice between fixed and adjustable products remains critical. The recent rise in the 30-year and 20-year fixed rates, alongside the 5/1 ARM, contrasts with the decline in the 15-year fixed rate, offering a mixed signal for investors and homebuyers assessing the cost of capital in the US housing market.