Blog · Market note · Aug 30, 2026 · 7 min
The $40 trillion reason mortgage rates will not come down
It is not a Jackson Hole speech. It is the Treasury issuing paper against a $40 trillion debt — and mortgage rates live on that long end.
The financial press treats every Jackson Hole paragraph as if Kevin Warsh, or whoever has the chair that week, were setting your 30-year rate in a conference hall. That is not how the long end of the curve works. Mortgage rates are priced off the Treasury market. The Treasury market is priced off supply. Supply, right now, is the financing of a public debt that has crossed $40 trillion.
Q1 2026 public debt-to-GDP sat at 122.59%. Fiscal year 2025 closed with a $1.79 trillion deficit on $5.3 trillion of revenue against $7.1 trillion of spending. Net interest on that debt hit $961.7 billion — 14% of total federal outlays, the highest share since 1998. Interest is on a path to crowd defense, Medicare, and Social Security. That is a fiscal fact, not a Fed talking point.
When the Treasury has to issue that much paper, yields on the long end stay bid. Mortgage rates follow. A 6.8% thirty-year is not a mystery and it is not a personality. It is the coupon the market demands to fund the government.
This week’s housing tape: mortgage rates around 6.81%, inventory up about 3% year over year — roughly 44,000 more homes. That is higher than any COVID year and still lower than the pre-COVID years. National prices cannot fall in any orderly way while that is the stock. All real estate is local. Los Angeles is drifting toward balance — inventory up, price-per-foot softer — at the same moment rates have stopped their 2023 climb. That is a buyer window, not a collapse.
Ryan Serhant can divide the country into four housing markets if it makes a reel. The households who cannot qualify at these rates are not a fourth market. They are out. Four million purchases and four million sales in a year is a thinner country than the one that minted 2021 originators.
Selling still works. It is slower, and it is more technical. Buying cash-flowing property in this rate regime has tax and basis conversations that a consumer portal will not have for you. Estates, especially, should not wait for a mythical 4% thirty-year before listing a vacant Los Angeles house. Carrying costs do not wait for Congress.
Educational only. California probate and trust administration are fact-specific. Confirm authority, court requirements, and tax consequences with the estate’s attorney and tax advisor. See the California Probate Code.