JPMorgan Chase
JPMorgan London Whale Trading Losses
Estimated impact: $6.2B
JPMorgan's Chief Investment Office accumulated massive synthetic credit derivative positions that resulted in $6.2 billion in trading losses. Trader Bruno Iksil's positions grew unchecked as risk models were manipulated and senior management dismissed early warnings.
Decision context
Whether to reduce or hedge the CIO's growing synthetic credit portfolio as positions exceeded internal risk limits in early 2012.
Biases present in the decision
Toxic combinations
- Yes Committee
Reference class base rates
Across all 146 curated case studies in our library:
Lessons learned
- Risk models that can be manually overridden without independent review create dangerous blind spots.
- When traders mark their own positions, conflicts of interest can obscure true risk exposure.
- A culture where challenging senior traders is discouraged allows losses to compound.
Source: U.S. Senate Permanent Subcommittee on Investigations, "JPMorgan Chase Whale Trades" Report (2013) (Case Study)
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