You Can Be a Stock Market Genius

Reviewed by Diario de un Inversor · UpdatedJune 13, 2026

Our review

Before Joel Greenblatt popularised his «magic formula», he wrote this book revealing the method that actually made him wealthy: identifying special market situations that conventional analysis ignores because they are structurally complex, temporarily opaque, or too small for large funds to cover. Spinoffs, ongoing mergers, recapitalisations, and restructuring securities are the categories Greenblatt dissects with real examples, concrete figures, and a narrative style that is surprisingly accessible given the technical depth of the content. The thesis is that these situations create exploitable price inefficiencies precisely because most market participants ignore them for reasons unrelated to fundamental value. The book is one of the few in its category that combines rigour with honesty about the effort this type of investing requires: special situations are not shortcuts; they are differentiated hard work. The 1997 edition has aged reasonably well, though some examples reflect a regulatory and accounting environment predating Sarbanes-Oxley.

Key takeaways

• Special situations — spinoffs, mergers, restructurings — generate price inefficiencies that systematic analysis can exploit.
• Spinoffs are particularly interesting because original shareholders typically sell the separated subsidiary without analysing its intrinsic value.
• Size matters: special situation opportunities tend to concentrate in mid- and small-cap companies ignored by large funds.
• Margin of safety remains the central concept: even in special situations, the price paid determines the outcome.

Fact

Published in 1997, Greenblatt documents in the book having achieved annualised returns above 50% at his fund Gotham Capital during its first decade of operation.