Office CMBS Distress Re-Accelerates: Overall Rate Highest Since November 2020, Multifamily Jumps 35bps
Trepp's September 2026 report (published October 2) breaks the summer's plateau. The overall CMBS delinquency rate rose 17 basis points to 8.02% — its highest level since November 2020 — and the increase was broad: "Delinquency rates increased or remained flat across four of the five major property types, while retail fell sharply" (Trepp).
By property type (September 2026): office 12.16% (+16bps), multifamily 8.04% (+35bps), lodging 6.18% (+34bps), retail 6.58% (−62bps, on mall cures), industrial 1.14% (unchanged). The multifamily jump matters for the housing side of this topic — rental-market distress is no longer an office-only story, even as SF Is Now the Only Top-Tier Seller's Market: 9.6% Price Cuts vs 21.1% Nationally as AI Wealth Meets 7% Mortgages shows SF rents going vertical.
The five largest newly delinquent loans map the distress geography: a $1.10 billion eight-property studio-and-office portfolio in Los Angeles, a $470.0 million two-tower office complex in Houston, a $280.0 million beachfront hotel loan in Santa Monica, a $230.1 million office loan in Denver, and a $208.9 million single-tenant office loan in Silicon Valley. Two thesis-relevant readings: (1) the distress is not a simple "AI metros win" map — single-tenant and secondary office goes delinquent even inside AI metros (Silicon Valley, LA), while AI-anchored Class A tightens (AI Is Now 31% of All New SF Office Leasing — and Its Favored Submarkets Are Tightening Twice as Fast as Their Cities); (2) Sun Belt office (Houston) and mountain-west (Denver) join the big-loan delinquency list alongside the gateway markets. Fitch's September tracker corroborates the special-servicing pressure: "The office special servicing rate was 14.7% in September, unchanged from August," with Fitch-basis office delinquency at 8.98% (from 9.08%) (Fitch Ratings, Oct 9).
Context from the same Trepp report: the July 2012 peak was 10.34%, so the overall rate is still ~2.3 points below GFC-era extremes — but the direction since the September 16 Fed hike (The Warsh Fed's First Hike Since 2023 Lands on a Market Already Split by the AI Map) has turned unambiguously higher again.