Pimco's AAA-Rated CMBS Hit with 85% Writedown, Losing Over $35 Million
nashnova research
A AAA-rated commercial mortgage-backed security held by Pimco has lost over $35 million after the underlying Philadelphia office complex cratered 85% in value — the third time since the financial crisis that top-rated CMBS investors have taken real losses, signaling that the "AAA" label no longer equals safety in single-asset structures.
What happened to this building?
The underlying asset is Centre Square, a twin-tower office complex in downtown Philadelphia. It was valued at $471 million in 2019; last month a court approved its sale for just $70 million — a drop of more than 85%.
This means → the $368 million CMBS has lost nearly all its collateral backing. Seven lower-rated tranches will be wiped out entirely.
Buyers PMC Property Group and developer Dean Adler plan to convert floors into a luxury hotel (~300 rooms) and up to 500 apartments. In plain terms = the building's life as an office tower is over; survival means reinvention.
How did occupancy fall from 93% to 28%?
Centre Square was acquired in 2017 for $328 million, one of the largest commercial property deals in Philadelphia's history. When the mortgage was refinanced and securitized in early 2020, occupancy stood at roughly 93% across 56 tenants.
The securitization closed just weeks before COVID hit the office market. Remote work drove occupancy down steadily to 28% by June this year.
By mid-2022 the borrower said it could neither repay nor refinance. The loan was transferred to a special servicer; after failed negotiations, the property was foreclosed and listed for sale.
How much did Pimco lose?
Pimco held roughly $58 million face value of the deal's bonds, about half in the top-rated tranche.
Wall Street strategists estimate a recovery rate of about 44 cents on the dollar.
Based on position changes and bond prices at the time, Pimco's losses are projected to exceed $35 million.
Why can a AAA rating still lose money?
All three post-crisis AAA CMBS blow-ups — Centre Square, New York's Palisades Center mall (AAA holders lost over $70 million), and Manhattan's 1740 Broadway (losses ~$40 million) — share one feature: they are all SASB deals.
SASB — single-asset, single-borrower — is a securitization backed by one building and one borrower. In plain terms = a standard CMBS is a basket of eggs where a few can crack without disaster; a SASB deal is one egg — if it breaks, everything breaks.
KBRA analyst Nitin Bhasin puts it bluntly: the outcome is "binary" — either full repayment or default followed by a long workout, with no middle ground. This reflects the collapse of the protection that top ratings are supposed to provide in these structures.
Will there be more blow-ups ahead?
Bank of America CMBS strategist Alan Todd warns that office values in Chicago, downtown Los Angeles, Portland, and Denver have not recovered. More loans will mature in the next year or two, and "borrowers will have nowhere to go."
New York and San Francisco are seeing some rebound in leasing demand, driven by AI-sector expansion. But office demand elsewhere may take years to recover — and some markets may shrink permanently.
This means → the risk exposure in SASB CMBS is far from over. Investors holding these securities need to scrutinize the real occupancy rates and maturity schedules of the underlying assets, deal by deal.
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