While falling mortgage rates will improve affordability, the "lock-in effect" for existing homeowners with ultra-low rates will persist. This will suppress the typical sales volume rebound, leading to an anemic 3% growth in purchase volumes, a historically tepid response to improved affordability conditions.

As mortgage rates fall, more homeowners will list their properties, increasing inventory. This rise in supply will happen concurrently with the rise in demand from improved affordability. This dynamic will prevent a surge in home prices, keeping annual appreciation capped at a modest 2% for the upcoming year.

Recent housing data, including prices, sales, and construction starts, indicate the market is no longer in freefall. However, it has bottomed out at a very weak level, comparable to the financial crisis or the pandemic's peak, with no signs of a strong recovery.

Existing homeowners have resisted price cuts due to low mortgage rates, but they will eventually face the same market realities builders are addressing now. This delayed "price discovery" is expected to cause a 1-2% nationwide decline in resale home prices in 2026.

A sustainable recovery in housing activity requires a roughly 10% improvement in affordability. Morgan Stanley calculates this threshold will be met when mortgage rates fall to approximately 5.5%, a specific target needed to meaningfully "unstick" the market from its current low-activity state.

A significant housing market recovery requires a substantial and sustained improvement in affordability. Analysts estimate a 100-basis-point drop in mortgage rates (e.g., to 5.5%) is needed to trigger a meaningful pickup in sales. However, this growth is not immediate; sustainable increases in sales volumes typically materialize a full year after the affordability improvement occurs.

A major driver of today's housing scarcity is that homeowners, particularly Boomers, who refinanced into sub-3% mortgages have no financial incentive to ever sell. This seemingly positive economic condition has had the negative side effect of locking vast amounts of housing inventory in place, worsening the supply crisis.

The gap between existing mortgage rates (under 4.25%) and new rates (over 6.25%) is over 200 basis points. This spread, which disincentivizes homeowners from selling, has persisted for three consecutive years. Historically, the gap only exceeded 100 basis points for a total of eight quarters over the past four decades, making the current situation a major anomaly.

A significant cause of today's housing inventory shortage is that homeowners are locked into low-interest mortgages. "Portable mortgages," which are being actively evaluated by the FHFA, would allow homeowners to transfer their existing mortgage to a new property, removing the financial disincentive to move and potentially unlocking market liquidity.