The most widely used U.S. mortgage rate has climbed back above 7%, dealing another blow to buyers already squeezed by record prices and thin housing supply. The average rate on a 30-year fixed mortgage rose 15 basis points to 7.12% in the week ended September 18, the Mortgage Bankers Association said Wednesday. Reuters reported that the rate was the highest since May 2024 and the first reading above 7% since the opening week of President Donald Trump’s second term. The jump raises monthly payments just as the autumn home-buying season begins and leaves affordability near the center of the economic debate ahead of the midterm elections.
Long-term government borrowing costs help explain the move. The Federal Reserve’s latest H.15 release put the 30-year Treasury constant-maturity yield at 5.29% on September 21, after readings between 5.29% and 5.36% over the previous five business days. That yield is determined in the bond market rather than directly by the Fed, but it reflects expectations for inflation, growth, federal borrowing and the future path of short-term rates. Mortgage lenders price home loans from a mix of those long-bond signals and mortgage-backed securities, so a sustained rise in Treasury yields can pass quickly into consumer borrowing costs.
The latest pressure follows the Federal Reserve’s move to lift short-term rates as officials respond to renewed inflation risks. Reuters said rising oil prices have added to the climb in Treasury yields and noted that mortgage rates have increased by more than a percentage point since the escalation involving Iran began pushing global energy costs higher in February. That combination creates an uncomfortable policy mix: energy expenses lift household bills while higher interest rates make homes, cars and business investment more expensive. It also makes a rapid reversal in long-term yields harder to count on even if day-to-day trading remains volatile.
Prediction trading reflects that skepticism. A Polymarket contract tied to whether the 30-year Treasury yield falls below 5.24% before the end of September was priced near 6% on Wednesday after a sharp one-day repricing. The broader event had attracted about $54,000 in total activity, including roughly $5,000 over the latest day. Those prices are market-implied expectations, not a forecast from the Treasury or the Federal Reserve, and the contract concerns a specific threshold rather than the direction of every bond yield. Still, the low probability captures how little time remains for a meaningful retreat before month-end.
The next test will come from the daily Treasury-rate releases, incoming inflation data and any shift in oil prices or Federal Reserve guidance. For households, the practical question is whether the bond market can stabilize long enough for lenders to bring mortgage quotes back below 7%. Until then, many would-be buyers face a familiar choice between accepting a larger monthly payment, lowering their purchase budget or waiting for financing conditions to improve.
