The Little Book That Beats the Market

Joel Greenblatt argues that most individual investors don't need to pick winning stocks through deep company research, market timing, or expert stock tips, because a disciplined, mechanical formula combining two simple metrics can reliably identify good businesses trading at attractive prices. His "magic formula" ranks companies by earnings yield, a measure of how cheap a stock is relative to its earnings, and return on capital, a measure of how efficiently a business turns invested money into profit, then combines the two rankings to surface companies that are simultaneously cheap and good. The strategy asks investors to buy a basket of the highest-ranked stocks and hold them mechanically for roughly a year before rebalancing, deliberately removing emotion, hunches, and stock-picking ego from the process.

Why this matters is that Greenblatt is directly confronting the widespread assumption that beating the market requires either professional-grade research resources or insider-level sophistication that ordinary investors simply don't have access to. His argument, backed by historical backtesting over a multi-decade period, is that a formula-driven approach anyone can apply with public financial data can outperform market averages precisely because it enforces the unglamorous discipline of buying unpopular, cheap, high-quality businesses and holding them through the discomfort of underperforming stretches that would tempt most investors to abandon the strategy. Readers should note the book's backtested results predate 2005 and haven't always held up as cleanly since publication, and any formula's edge can erode as more investors adopt it.

Who should read it

This suits individual investors looking for a disciplined, low-effort alternative to picking stocks by instinct or chasing trends, and anyone curious about value investing principles distilled into an actionable system. It's less useful for readers seeking active trading strategies or short-term speculation.

About the author

Joel Greenblatt is an American investor, hedge fund manager, and academic who co-founded Gotham Capital and has taught value investing at Columbia Business School.