Summary and review ofFooling Some of the People All of the Time: A Long Short (and Now Complete) Story

Reviewed by Diario de un Inversor · UpdatedJune 13, 2026

Our review

Fooling Some of the People All of the Time is a singular book in financial literature: a hedge fund manager narrates in the first person his own multi-year investigation into a publicly traded company he publicly accused of accounting fraud. David Einhorn, founder of Greenlight Capital, began investigating Allied Capital, a business development company, in 2002 and found what he believed to be systematic irregularities in the valuation of its loan portfolio. What follows is a narrative as fascinating as it is unsettling about the mechanisms of institutional resistance to scrutiny: an SEC that does not act, analysts who ignore the evidence, regulators who close the file. The book is simultaneously a practical manual on forensic financial statement analysis, a financial thriller, and an indictment of structural failures in American market oversight. The complete 2010 edition includes the final outcome: Allied Capital was absorbed by Ares Capital in 2010 after years of deterioration. Einhorn's voice is direct and confident, but readers should consider that the book presents a one-sided perspective.

Key takeaways

• Accounting irregularities can persist for years if regulators, analysts, and media lack incentives to question them publicly.
• Institutional resistance to scrutiny — evasive responses, legal pressure, regulatory silence — is itself a warning signal for the independent analyst.
• Short-side analysis requires special emotional fortitude: the market can remain wrong longer than most investors can remain solvent.
• Public disclosure of a negative company analysis triggers systemic pressures that extend well beyond the purely financial.

Fact

Allied Capital was acquired by Ares Capital Corporation in 2010, eight years after Einhorn began publicly denouncing its alleged accounting irregularities, an outcome documented in the complete edition of the book published that same year.