US national median home sale prices decline year-over-year before the end of 2027.

Question

Six frontier AI models put this at 35% by 31 Oct 2029. Full reasoning from every model.

WillHappen.ai · Accepted Answer

35% — the median of 6 frontier models, resolving by 2029-10-31.

Answer

Gemini (Google): 42% — Persistent supply deficits and rate-lock effects will likely prevent a sustained nominal year-over-year drop in median prices. NAR national median existing-home prices already dipped negative YoY in early 2023, showing the threshold is historically accessible. A severe spike in unemployment or a rapid inventory thaw would be required to break the current structural undersupply before late 2027. With the Fed easing mortgage rates gradually, renewed demand typically offsets inventory increases enough to maintain positive nominal drift.

Answer

Claude (Anthropic): 42% — Hinges on whether high rates plus inventory buildup finally break the sticky national median price before end-2027. Existing-home median prices have risen YoY nearly every month since 2012 except brief 2023 dips, showing strong stickiness. Rising inventory, 6-7% mortgage rates, and softening regional markets (South/West) increase odds of a national YoY dip by 2027. Resolution window is generous (through 2029-10-31 but event must occur by end-2027), giving multiple monthly data points to catch a dip.

Answer

GPT (OpenAI): 63% — A sustained affordability squeeze must outweigh the unusually tight stock of homes for sale. NAR's national existing-home median has fallen year-over-year only sporadically, notably during the 2008-11 bust. By end-2027, buyers need lower demand from rates or recession before sellers unlock enough inventory to clear at lower prices. A sharp Fed easing with resilient employment would lift purchasing power and likely prevent a national annual median decline.

Answer

Grok (xAI): 22% — National medians fall YoY only if a 2027 recession or inventory surge forces widespread seller cuts. NAR existing-home medians posted YoY drops in just a few 2023 months after the 2022 rate shock; otherwise none since 2012. Inventory remains historically tight and millennial household formation supports a price floor through 2027. A labor-market break or forced-sale wave would flip the call; neither is the late-2026 base case.

Answer

DeepSeek (DeepSeek): 22% — Whether a recession or a mortgage-rate spike forces enough distressed supply to overwhelm demand before 2027. The NAR national median existing-home price has fallen year-over-year in only 3 of the last 40 years, and those were 2008, 2009, and briefly 2023, so the base rate is… The Fed has begun cutting rates in late 2025 and mortgage rates near 6 percent are already pulling buyers back, which historically supports prices rather than depresses… A sharp recession with job losses and a 1.5 million-plus inventory surge would be needed to force a sustained annual decline, and that is not the current trajectory.

Answer

Qwen (Alibaba): 28% — National median declines require a recession or forced-selling wave; the lock-in effect keeps supply too thin for organic correction. The lock-in effect (owners holding sub-4% mortgages) suppresses listings, keeping inventory historically low and propping up median prices. National median existing-home prices showed YoY declines only briefly in 2022-23 despite a 300bp rate shock; a sharper macro shock is likely needed. A recession starting by mid-2027 with unemployment above 5.5% would be the clearest path to resolution; absent that, supply constraints dominate.

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