Reconciling Individual Stock Returns and Factor Portfolio Returns

Alpha Architect

Jack Vogel

Research

6 Pages

Alpha Architect examines why individual stock outcomes often look disastrous while diversified factor portfolios still outperform over time. The piece challenges the idea that passive indexing is the only rational response to skewed stock returns, arguing value portfolios beat growth despite winners being growth stocks.

Key Takeaways

Extreme Return Concentration: Just 4% of listed U.S. stocks generated the market’s entire net wealth creation since 1926, while 58% underperformed one month Treasury bills.
Value Portfolio Advantage: From 1975 through 2015, value portfolios outperformed growth portfolios across 40 years, even though many top individual wealth creators traded at expensive valuations.
Diversification Changes Outcomes: Simulations showed individual small cap stocks behaved like speculation, yet diversified small cap portfolios historically produced stronger long term return distributions over 5 and 10 year periods.
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