AT1 Bonds Become Pain Point in Global Bond Selloff, German Mortgage Lenders Hit Hardest
nashnova research
In the global bond selloff, AT1 bonds issued by property-heavy banks are suffering the steepest losses — PBB's AT1 fell below 80 cents on the euro and LBBW's dropped below par for the first time in over a year. This means → rising rates are transmitting pain down the chain from government bonds to AT1s to real-estate credit.
What are AT1 bonds, and why do they hurt first?
AT1 bonds — Additional Tier 1 capital instruments, a type of "last line of defence" bond banks issue to meet regulatory capital requirements — sit at the riskiest, highest-yielding layer of a bank's capital stack.
This means → when the market worries about a bank's asset quality, AT1 prices fall faster and deeper than ordinary bonds.
The euro-hedged AT1 composite index has posted a negative 2% total return since August; individual banks' losses run two to four times the index.
Who got hit the hardest?
Deutsche Pfandbriefbank (PBB) saw a €300 million AT1 bond drop below 80 cents on the euro, losing more than 9% — the worst-performing AT1 in Europe's September market.
Landesbank Baden-Württemberg (LBBW) saw a €750 million AT1 callable in 2030 fall below par for the first time in over a year, declining at twice the composite-index pace.
In plain terms = both banks share one trait: outsized property-lending books. PBB calls commercial-real-estate finance its "core business pillar"; LBBW's property exposure accounts for roughly one-fifth of its total book.
How do rising rates hit property-heavy banks?
The root cause is a sharp rise in government bond yields: the Iran conflict lasting longer than expected has pushed energy prices higher since August, while Fed Chair Kevin Warsh's hawkish signals further undermined long-bond support.
This means → real estate depends heavily on debt financing; rising rates compress asset valuations and weaken borrower credit, increasing pressure on existing loans and shrinking room for new lending.
Kepler Cheuvreux head of credit research Sebastien Barthelemi noted this pattern is "the same as 2023 and 2024" — when U.S. commercial-real-estate fears drove PBB's AT1 down to 20 cents on the euro.
Is the pain still spreading?
Stress has already moved beyond AT1s: German apartment acquirer Net Zero Properties Sarl abandoned a €500 million funding plan after failing to attract investors even with sweetened terms.
Subordinated bonds issued by European real-estate firms have also lost significant value.
Jakub Lichwa, portfolio manager at TwentyFour Asset Management, noted that some European banks — especially German ones — saw commercial-property quality deteriorating before this selloff began. This means → without a recovery in rate markets, AT1 bonds with heavy commercial-property exposure are likely to keep underperforming the index.
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