US Housing & Mortgage Markets
One analyst is sounding an important epistemological alarm this week: the metrics bearish analysts are reaching for to call a housing downturn are the same ones that have produced false signals for the last several years — and Erdmann argues the misreads are structural, not accidental.
(Note: Brian Potter's post this cycle — on the history of invention timelines and the laser — contains no housing market content and is excluded from this briefing.)
THE SUPPLY-CONSTRAINED MARKET KEEPS FOOLING DEMAND-ERA ANALYSTS
Kevin Erdmann's read on March 2026 new home sales doubles as a thesis statement about the entire current cycle. His core argument: analysts trained on the 20th century demand-constrained housing market keep misreading supply-constrained signals, and the market keeps providing fresh ammunition for the wrong interpretation.
The pattern he documents is a sequence of head fakes. First, the post-Covid sales spike reversed — plausibly blamed on rate-driven demand destruction, but Erdmann argues that framing missed the supply-side mechanics. Then, homes under construction piled up relative to annualized sales — the only time in the modern dataset that happened, making 2022–2023 look superficially like 2008 to cycle-watchers. That inventory of completed homes for sale then rose, again echoing 2008's surface pattern. Now, completed homes for sale has peaked and will begin declining — removing that particular bear thesis from the table.
So what's next? Erdmann flags the incoming narrative: rising inventory of existing homes for sale. He's preemptively debunking it. The critical analytical point is that existing inventory rises in exactly 2 scenarios — when sales activity is climbing (a healthy market normalizing from historic lows) or when sales suddenly collapse (a genuine demand shock). The permabear camp, he argues, will treat any inventory build as confirmation of scenario two, when the base case is scenario one. Given how historically depressed existing supply remains, he notes inventory "could easily keep rising for a decade along with rising sales" without that signaling distress.
THE SUPPLY DEBATE'S MISSING PIECE
Erdmann also takes a pointed swing at the intellectual landscape around housing supply. He draws a sharp distinction between the abundance camp (Derek Thompson, Ezra Klein — supply-constrained, correct diagnosis) and the "housing cartel" camp (David Dayen at American Prospect — arguing builders deliberately meter production to sustain margins). His frustration: the abundance camp lacks the academic literature to anchor its argument on the post-2008 mortgage crackdown as the primary driver of the housing depression, leaving them without a clean rebuttal to Dayen's cartel thesis.
Ironically, he also notes that the cartel camp and the cycle-focused permabears are arguing opposite things — builders are either hoarding supply or perpetually overbuilding toward collapse — and both are empirically wrong. The 21st century market is supply-constrained in ways neither framework accounts for cleanly.
Closing Synthesis
This week's signal is thin on fresh data but rich on interpretive framework. Erdmann is essentially issuing a forward guidance note: don't mistake a rising existing-home inventory figure for a demand collapse signal. The completed new-home inventory overhang that briefly looked alarming is resolving. The next few quarters will test whether analysts can correctly attribute inventory normalization to supply recovery rather than demand deterioration. For buyers and sellers, the practical implication remains the same as it has been — this is not a market on the edge of a price collapse; it is a structurally undersupplied market slowly, noisily working toward equilibrium.
TL;DR - Completed new-home inventory has peaked and is declining, removing a key bear-case data point from the table. - Rising existing-home inventory is the next head-fake signal — Erdmann argues it reflects a normalizing supply-constrained market, not a demand collapse. - The intellectual frameworks for diagnosing housing supply remain muddled: the abundance camp lacks the academic grounding to rebut cartel-theory critiques, and permabears keep applying 20th-century demand-cycle logic to a fundamentally different market. - One source this cycle was off-topic (Potter on invention history); the briefing reflects a single housing analyst.
Compiled from 2 sources · 2 items
- Brian Potter (1)
- Kevin Erdmann (1)