Code Curiosities

The Spreadsheet Error That Ate $6 Billion

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In 2012, a single copy-paste mistake in a Microsoft Excel formula helped trigger one of the biggest trading losses in Wall Street history — JPMorgan's infamous 'London Whale' disaster. We dig into how a humble spreadsheet, the same tool your aunt uses to plan Thanksgiving seating, became a load-bearing wall in the global financial system without anyone really deciding that should happen. If last…