Edward O. Thorp
Portfolio
How position sizing, concentration, and risk fit the style.
Holdings and trading positions
Edward O. Thorp's portfolios were built from paired and hedged positions rather than famous standalone stocks. Records concern Princeton/Newport Partners, later quantitative programs, and examples in his writings; they do not disclose every security in his personal accounts.
Documented position types
Convertible bonds with equity hedges: The fund bought mispriced convertible securities and shorted related common stock to isolate the conversion-value discrepancy.
Warrants and options: Thorp used mathematical valuation to buy underpriced claims, sell overpriced ones, and hedge the unwanted market exposure.
Merger and corporate-event positions: Paired securities were used when a defined event created a measurable spread and probability distribution.
Statistical-arbitrage baskets: Later research exploited short-lived relationships across many equities rather than relying on one company's long-term appreciation.
Long-term personal investments: Thorp has described owning diversified equities and evaluating Berkshire Hathaway, but his complete personal portfolio has never been a public model portfolio.
Why individual names are scarce
The economic holding was often a spread: one security long and another short. Publishing only the long side would make a market-neutral trade look like a directional bet. Princeton/Newport closed in 1988, while Thorp's later positions and current personal holdings remain private.
How to read this list
The important portfolio unit is the hedged relationship. Detailed case outcomes belong in Best Investments; sizing and Kelly-based capital allocation belong in Decision Framework.