Mortgage rates near 7% as 30-year Treasury yield tops 5.32%

The yield on the 30-year U.S. Treasury bond touched 5.323% on Aug. 18, a 19-year high, lifting the borrowing costs that sit under mortgages and car loans, before easing back to just under 5.3%.

The move followed a run of fiscal news. The federal deficit in July was $432.3 billion, its highest monthly total since March 2021, pushing the year-to-date shortfall to nearly $1.8 trillion, according to the Treasury Department's monthly statement. Net interest on the federal debt, which stood at $39.9 trillion on Aug. 12, came to $931 billion over the first 10 months of fiscal 2026.

Shorter maturities barely moved. The 10-year note, the benchmark most consumer lenders watch, eased about a basis point to 4.71%, and the 2-year note was unchanged at 4.19%, according to Treasury's daily par yield curve for Aug. 18. A basis point is one hundredth of a percentage point, and yields fall as prices rise. Government borrowing costs elsewhere also reached multidecade highs.

What is lifting yields

Analysts point to several forces at once. Commonfund, an investment manager, attributes the rise less to inflation than to the federal budget deficit, a wave of AI-related corporate bond issuance competing with Treasuries, and a higher term premium, the extra compensation investors want to lend to the government for decades.

Inflation remains the other pressure. The consumer price index rose 3.4% over the 12 months to July, above the Federal Reserve's 2% target, and the stalled U.S.-Iran war has pushed Brent crude above $90 a barrel. A 60-day negotiating window tied to a ceasefire framework expired on Aug. 17 without a deal to reopen the Strait of Hormuz, and Iran ruled out an extension, CNBC reported.

For a household, the yields are an abstraction until they land on a loan. The average rate on a 30-year fixed mortgage was 6.75% on Aug. 18, up from 6.71% at the close of the previous week, according to Mortgage News Daily.

What borrowers now pay

The 10-year note underpins the pricing of trillions of dollars in loans and mortgages worldwide. It stood at 4.71% on Aug. 18, up from 3.97% on Feb. 27, the day before the Iran war began. As the yield climbs, the cost of fixed mortgages and other long-term loans climbs with it.

Auto borrowers face the same drift. Buyers financing a new vehicle are contending with annual percentage rates of about 6.9% on a 60-month loan, according to Bankrate's Aug. 12 survey, while CNBC put used-car rates near 10.6%. Variable-rate credit cards track the prime rate, which moves with the Fed's policy rate rather than with long-dated yields.

Lawrence Yun, chief economist at the National Association of Realtors, tied the two markets together. "The impact on mortgage rates is directly related to higher bond yields," he said.

"The higher bond yields on long-dated securities, like the 30-year Treasury, clearly indicate discomfort over persistently high inflation in the future," Yun said.

A global selloff

The pressure is not confined to the United States. Japanese 10-year debt touched 2.945%, its highest since 1996, Reuters reported. German 30-year bonds traded at their costliest since 2011 and French 30-year borrowing costs reached their highest since 2008, according to CNBC. U.S. stocks slipped as yields rose, with the S&P 500 down 0.4% and the Nasdaq off 1%.

Weak demand at recent auctions has reinforced the trend. BMO noted that the Aug. 13 sale of 30-year bonds cleared at 5.216%, the highest auction yield since 2001, and that five of the previous seven 20-year sales had "tailed," a sign that appetite for long-dated debt has thinned. A $42 billion 10-year auction the day before drew 4.683%, the highest since 2007.

Corporate borrowing is adding to the supply. Commonfund said the five largest U.S. hyperscalers had issued $159 billion in bonds by mid-2026, more than the $121 billion they sold in all of 2025 and well above their 2020 to 2024 average of $28 billion a year.

The government's own bill is part of the arithmetic. Net interest cost $970 billion in fiscal 2025, more than the roughly $917 billion spent on national defense, Commonfund analyst Haider Hassan wrote. Debt service is now the third-largest item in the federal budget, behind Social Security and Medicare.

Bond yields climbed even as retail sales fell 0.6% in July against expectations of a small gain and headline producer prices were unchanged, data that would normally argue for lower rates.

That disconnect drew comment from strategists. Anshul Pradhan, head of U.S. rates research at Barclays, noted that three releases during the month, on consumer spending, employment and inflation, all argued for lower yields, and that long-end yields moved higher anyway.

The Fed's next move

Attention now turns to the Federal Reserve. Axios reported that long-dated yields rose partly on the uncertainty created by Chair Kevin Warsh's stated opposition to forward guidance, and on his suggestion that moves in market yields could substitute for action on the policy rate. Investors demanded the highest yields in roughly two decades to absorb some $67 billion in long-term Treasuries the week of Aug. 10. Futures markets put the chance that the Fed holds its policy rate at 3.50% to 3.75% on Sept. 16 at about 68%, with the rest of the pricing on an increase.

Year-ahead inflation expectations measured by the University of Michigan rose to 4.3% in August from 4.2% in July, a fifth straight month above 4%.

How high it could go

Strategists see room for yields to rise further. Henry Allen, a macro strategist at Deutsche Bank, has argued that resilient growth and record-high equities keep financial conditions loose, raising demand and pushing central banks toward faster rate increases. The 10-year yield followed a similar path in early 2024, rising from 3.88% at the end of 2023 to 4.70% by late April.

When it comes to longer-dated Treasury issuance, investors are increasingly focused and concerned about the growing amount of U.S. debt and America's lack of fiscal discipline

Saglimbene said the auctions themselves are where that pressure shows. Frequent, large-scale Treasury sales give the bond market a chance to push back against the government's fiscal trajectory by demanding higher yields for the auctions to clear.

The cost to households

The immediate effect for borrowers is narrow but concrete. When the government pays more to borrow, it raises the floor for nearly everyone else, and the increases show up first in the loans tied most closely to long-dated yields. On Aug. 18 those rates ranged from just under 7% on a fixed mortgage to more than 10% on a used-car loan.

The average 30-year fixed mortgage rate has held between 6.69% and 6.80% through August, according to Mortgage News Daily.

Whether those numbers ease depends on forces outside any single household's control. The Fed meets on Sept. 15 and 16, oil prices hinge on the Iran talks, and Treasury will keep selling debt to fund the deficit. Each of those, strategists said, points more toward higher yields than lower ones for now.

What is not known

Much of what comes next is unsettled. The Fed has not said whether it will hold or move in September, the Iran negotiations have no set date to resume, and neither Treasury nor the strategists cited have put a ceiling on how high the 30-year yield could climb. Jackson Hole and the August inflation report are the next scheduled markers investors will read.