Deutsche Bank lost $1.8B on Boaz Weinstein's credit bets — first loss in 50 years

Boaz Weinstein was one of Deutsche Bank's most successful proprietary credit traders, named a managing director at age 27 in 2001. His Saba trading group grew to roughly $30 billion in positions and $10 billion in capital by early 2008.

Weinstein's strategy was capital structure arbitrage — buying corporate bonds and credit default swaps (CDS) on the same company, betting that the relationship between the two would converge. The strategy had generated huge profits: roughly $900 million in 2006 and $600 million in 2007.

When Lehman Brothers collapsed in September 2008, two things went wrong simultaneously. Corporate bond prices collapsed as investors sold everything. And the CDS market froze — market participants were afraid to enter trades with banks that might fail. The 'basis trade' hedge broke: the CDS protection Weinstein thought he had was worthless exactly when he needed it. Losses hit $1.8 billion by year-end, though $600 million was later recovered.

Deutsche Bank reported its first annual loss in 50 years — €3.9 billion ($5 billion) for 2008. The bank shut down Weinstein's operation and scaled back proprietary trading. Weinstein left in early 2009 and founded Saba Capital Management, a hedge fund that now manages $6 billion. He later became known as the counterparty who identified the mispricing that led to JPMorgan's 'London Whale' $6.2 billion loss.

Weinstein's basis trade relied on CDS protection that became unexecutable when the market froze, costing $1.8B and the bank's first loss in 50 years.

Weinstein's basis trade relied on the correlation between corporate bonds and CDS prices — a relationship that broke entirely when the CDS market froze after Lehman's collapse.

The hedge was only a hedge if it could be executed when needed. When the CDS market became dysfunctional, the protection Weinstein had bought was worthless at the moment of maximum risk.

Deutsche Bank's risk management allowed a single proprietary desk to accumulate $30B in positions — a concentration that threatened the bank's solvency and produced its first annual loss in 50 years.

A hedge is only a hedge if you can actually execute it when you need it. When the CDS market froze, the protection Weinstein thought he had vanished — and $1.8B went with it.