Excel-lent Mistakes: A Hall of Shame

This Spreadsheet Could Ruin Your Life (And Definitely Your Bonus)
You think it’s just Excel—until it’s not. In this episode of Overleveraged, Overconfident, we unpack five real-world spreadsheet fails that triggered $24 million losses, $6 billion meltdowns, government investigations, and even global austerity policies. From Barclays hiding rows in a bankruptcy deal to Fannie Mae's $1.2 billion “oops,” and JP Morgan’s $6B model built by one guy in London with a PhD and no backup plan, it’s a masterclass in how bad inputs = career-ending outputs. If you've ever copy-pasted a formula and prayed no one noticed…this one's for you.

Come for the Excel horror stories, stay for the schadenfreude.