U.S. Existing Home Sales Rise for First Time in Four Months in September, but Surging Mortgage Rates Weigh on Outlook
nashnova research
U.S. existing-home sales rose 1.5% in September to an annualized 3.99 million units, snapping a four-month slide; yet the 30-year fixed mortgage rate has since surged over 50 basis points to 7.49%, and NAR's chief economist warns Q4 activity will weaken markedly.
Four-month losing streak broken — how real is this rebound?
September existing-home sales hit an annualized 3.99 million units, up 1.5% month-over-month and slightly above the Bloomberg consensus of 3.95 million.
NAR chief economist Lawrence Yun was blunt: August and September were still the two weakest months of the year.
This means → the uptick looks more like a technical bounce after sustained declines, not a trend reversal.
Rates jumped 50 basis points — how much buying power vanished?
Since early September the 30-year fixed mortgage rate has climbed over 50 basis points to 7.49%; part of September's improvement occurred before that spike hit.
Realtor.com chief economist Danielle Hale estimates the past five weeks of rate resets cut buying power by more than 6% across all budget tiers — equivalent to an extra $19,000 hit on a $2,000-per-month payment budget.
In plain terms = the same monthly payment now buys a home worth 6% less than five weeks ago — a loss nearly twice the typical off-season price discount.
What is the "lock-in effect" — and why does every rate spike revive it?
The lock-in effect — homeowners sitting on low-rate mortgages refuse to sell because trading up means taking a far costlier new loan, effectively locking existing inventory off the market — had begun to ease earlier this year.
The latest rate surge has stalled that progress; low-rate holders have again lost the incentive to list.
This reflects a core tension in the U.S. housing market: every rate rebound simultaneously crushes buyer affordability and seller willingness to list, squeezing both sides of the equation.
Prices still climbing, inventory also climbing — is that a contradiction?
The median existing-home price in September was $417,500, up 1.3% year-over-year, extending a streak of annual gains since mid-2023.
Inventory rose 4.6% year-over-year to 1.6 million units — a 4.8-month supply, the highest in over a decade.
This means → supply is slowly loosening, but prices haven't followed it down — high prices plus high rates pushed NAR's Housing Affordability Index down another 1.2% year-over-year, raising the bar for the average household.
What does NAR itself expect for Q4?
Lawrence Yun told a press call that Q4 transaction activity will weaken and could decline notably.
Regional divergence is already visible: the South and West each rose 2.8% month-over-month in September; the Midwest was flat; the Northeast fell.
In plain terms = whether mortgage rates retreat before year-end is the single decisive variable — if rates hold above 7%, both buyers and sellers will keep waiting on the sidelines.
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