Bear Stearns
Bear Stearns Hedge Fund Collapse
Estimated impact: $1.6B
Two Bear Stearns hedge funds heavily invested in collateralized debt obligations backed by subprime mortgages collapsed, triggering a liquidity crisis that led to the firm's fire-sale acquisition by JPMorgan Chase. Fund managers anchored to historical CDO performance and ignored deteriorating fundamentals.
Decision context
Whether to maintain or reduce leveraged positions in subprime CDOs as delinquency rates began rising in early 2007.
Biases present in the decision
Toxic combinations
- Optimism Trap
Reference class base rates
Across all 146 curated case studies in our library:
Lessons learned
- Anchoring to historical default rates blinded managers to structural changes in the mortgage market.
- Leverage amplifies losses exponentially when underlying asset correlations increase during stress.
- Liquidity risk in structured products is often underestimated until a crisis materializes.
Source: SEC Litigation Release No. 22306 (2012); Bear Stearns Asset Management investor communications (SEC Filing)
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