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US MBA Purchase Index Falls to 148.2, High-Interest Rate Environment Batters Mortgage Demand

2026-10-01

In the latest week (Q3 2026, ending September 25), the US MBA Purchase Index reported at 148.2, sliding significantly from the previous week's 154.9. Total mortgage application volume contracted sharply by 6% for the week, marking a downward trend for the fourth consecutive week. The weak data highlights a strong wait-and-see sentiment among potential buyers under high borrowing costs, posing severe challenges to the housing market momentum.

Breaking down the key components, the seasonally adjusted Purchase Index dropped 4% for the week, while on an unadjusted basis, it plummeted 14% compared to the same period last year. Furthermore, the Refinance Index, which is more sensitive to interest rates, tumbled 9%, plunging 56% from a year ago. The refinance share of total mortgage applications was also further compressed to 38.3% from 39.3% the previous week.

Exploring the core driver of the cooling demand, the primary cause is the surge in the 30-year fixed mortgage rate. According to data from the Mortgage Bankers Association (MBA), the rate has climbed from 7.12% to 7.30%, reaching a new high since November 2023. Institutional analysis indicates that with robust economic data and inflation concerns, the bond market is repricing the Federal Reserve's policy path, and Treasury yields remain stubbornly high. This has shifted housing market expectations from "higher for longer" to a grim "higher from here."

Looking ahead, short-term (1-2 months) housing market transaction volumes will continue to be constrained by the dual squeeze of high interest rates and tight inventory, with the upcoming PCE inflation data and the Fed's stance serving as key catalysts. In the medium term (3-6 months), if inflation fails to cool down and US Treasury yields remain at high levels, housing purchasing power will face structural risks; conversely, if the central bank releases any unexpected dovish signals, pent-up home purchase and refinance demand is expected to thaw rapidly, driving the index to bottom out and rebound.

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