Mortgage Rates Defy Fed Hike as Market Uncertainty Reigns

Something unusual has happened in the U.S. mortgage market this month. The Federal Reserve raised its benchmark interest rate by a quarter point in September after holding it steady through most of 2026, citing stronger economic activity and inflation that had not cooled as quickly as hoped.

Mortgage rates did not rise with the Fed's decision. Instead, the average 30-year fixed refinance rate slipped to a 7.16% APR last week, down two basis points from the previous week.

The reason behind this unexpected move is that mortgage rates do not move in lockstep with the Federal Reserve. The Fed's policy rate is an overnight borrowing rate between banks, while a 30-year mortgage is heavily influenced by longer-term market rates, particularly the 10-year Treasury yield.

This means that mortgage markets can react to expectations before the Fed actually makes a decision. By the time the September rate increase arrived, investors had already spent weeks assessing the economic data behind it, making the hike itself not necessarily a surprise that required mortgage rates to suddenly reprice.