JIM O'SHAUGHNESSY
Quantitative investing pioneer who proved which stock-picking strategies actually work
Spent decades running every stock-picking strategy through the data and proved most of them don't work. Then published the results. His book "What Works on Wall Street" is essentially a cheat sheet for beating the market — backed by 80+ years of data. He founded O'Shaughnessy Asset Management, managed billions, then sold it to Franklin Templeton. Now he runs a media company because apparently disrupting one industry wasn't enough.
Net Worth
$500 million
Nationality
American
Time Horizon
Long-Term
Risk Appetite
5 / 10
CAREER & BACKGROUND
Started his career in finance in the 1980s. His breakthrough was applying rigorous backtesting to every popular stock-picking strategy — value, growth, momentum, small cap, dividends — and publishing the results with zero sugarcoating.
Founded O'Shaughnessy Asset Management (OSAM) in the early 2000s. The firm managed over $6 billion using systematic, factor-based strategies derived directly from his research.
He sold OSAM to Franklin Templeton in 2021.
After selling OSAM, he pivoted to media and venture capital. He founded O'Shaughnessy Ventures and hosts the popular "Infinite Loops" podcast with co-host Jamie Catherwood.
He's become one of the most influential voices in the crossover between quantitative finance and creative thinking.
COMPANIES & ROLES
O'Shaughnessy Asset Management (OSAM) was the main company — now part of Franklin Templeton. It ran systematic equity strategies across U.S.
and international markets.
O'Shaughnessy Ventures is his current vehicle — an investment firm and media company that invests in startups and produces content. The venture arm has invested in dozens of early-stage companies.
He also launched the O'Shaughnessy Fellowships — a program that funds young people to skip or leave college and pursue entrepreneurial projects.
INVESTING STYLE & PHILOSOPHY
Pure quantitative, factor-based investing. O'Shaughnessy tests every strategy against historical data before committing capital.
If a strategy doesn't work across multiple decades and market environments, he won't use it.
His research showed that value factors (low price-to-sales, high shareholder yield) and momentum factors (stocks with strong recent performance) have the most robust long-term track records. Simple combinations of these factors beat most active managers.
He's a systematizer, not a stock picker. The process, not the person, is the edge.
THE PLAYBOOK
Risk Approach
Moderate. His strategies are diversified and systematic — the opposite of concentrated bets.
Risk is managed through diversification across hundreds of stocks and strict rebalancing rules.
His venture investing is riskier and more concentrated, but it's a smaller portion of his overall wealth.
Money Habits
Lives in Greenwich, Connecticut. Active on social media — particularly Twitter — where he shares ideas on investing, creativity, and culture.
He's one of the more intellectually engaged investors in the public sphere.
He funds the O'Shaughnessy Fellowships, which pay young people $100,000 to pursue entrepreneurial projects instead of attending college.
BIGGEST WIN
Publishing "What Works on Wall Street." The book gave away his intellectual edge but established him as the definitive authority on quantitative stock selection. It led directly to OSAM, which he sold for hundreds of millions.
The knowledge was the product, and he monetized it brilliantly.
BIGGEST MISTAKE
Factor crowding. As his strategies became well-known and widely copied, the returns from the specific factors he identified diminished.
More money chasing the same edges compressed the premiums. He's been honest about this challenge — the best quantitative strategies lose their edge when too many people use them.
FINANCIAL PHILOSOPHY
O'Shaughnessy believes the data should drive every decision. Human judgment is biased, emotional, and inconsistent.
A disciplined system that buys stocks based on proven factors will beat human stock-pickers over time.
He also believes in intellectual curiosity as a competitive advantage. His pivot from pure quant to media, podcasting, and venture capital reflects a belief that cross-disciplinary thinking creates better investors.
His core conviction: the best strategies are simple, boring, and backed by decades of evidence.
FAMILY & PERSONAL LIFE
Married with children. His son Patrick O'Shaughnessy runs Positive Sum and hosts the popular "Invest Like the Best" podcast — one of the most respected investing podcasts in the world.
The father-son combo is a powerhouse in financial media.
EDUCATION
Undergraduate education at an American university. His real education was self-directed — building databases of stock returns spanning 80+ years and testing every investing hypothesis he could find.
He's more quant researcher than academically credentialed.
BOOKS & RESOURCES
What Works on Wall Street is the essential text — now in its fourth edition
It's one of the most data-driven investing books ever written
And "The Success Equation" by Michael Mauboussin
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QUOTES (6)
The market rewards factors, not feelings. Cheap stocks with momentum beat expensive stocks with great stories.
I test every strategy against the data before putting a dollar behind it. If it doesn't work across 80 years, I don't use it.
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