How an Excel Error Cost JP Morgan $6 Billion

In 2012, JP Morgan Chase, a leading financial services firm, faced a $6 billion loss, due to an Excel error in their Value-at-Risk (VaR) model.

The Pareto Investor
3 min readNov 14, 2023

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the London Whale Loss, traces its roots to an unassuming spreadsheet within JP Morgan’s Value-at-Risk (VaR) model

The incident, known as the London Whale Loss, traces its roots to an unassuming spreadsheet within JP Morgan’s Value-at-Risk (VaR) model, where an employee’s harmless data transfer between spreadsheets snowballed into a multi-billion-dollar catastrophe.

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