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The Tim Ferriss Show #818 · June 30, 2025 · 2h 36m

John Arnold — with Peter Attia Guest Hosting

John Arnold, Peter Attia
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Peter Attia guest hosts, interviewing John Arnold — widely considered the greatest energy trader of all time. Head natural gas trader at Enron by age 25. Walked away from Wall Street to reinvent philanthropy. Now deploys $400M annually through Arnold Ventures targeting criminal justice, education, and health. The episode is about what you do after you've made more money than you can spend.

Highlights

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Walking away at the top
Arnold left trading in 2012 despite being the best in the world at it.
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Evidence-based philanthropy over charitable relief
Arnold Ventures focuses on systemic reform, not charity. $400M annually.
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Baseball cards taught market dynamics
Arnold learned arbitrage and market mechanics from trading baseball cards as a teenager.
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Misc

✧Peter Attia guest hosts — rare for someone other than Ferriss to host
✧Arnold was head natural gas trader at Enron by age 25
✧Built Centaurus Advisors after Enron collapsed
✧Arnold Ventures deploys $400M annually — criminal justice reform, education, health research
✧Arnold studied economics and mathematics at Vanderbilt
✧His wife Laura co-chairs Arnold Ventures