Fooling Some of the People All of the Time: A Long Short Story, Updated with New Epilogue

*Fooling Some of the People All of the Time* is hedge fund manager David Einhorn's first-person account of his six-year public battle with Allied Capital, a publicly traded business development company he and his firm, Greenlight Capital, publicly identified as a short-sale candidate in 2002 due to what he came to believe was aggressive, misleading accounting used to overstate the value of its loan portfolio and mask underlying losses. What began as a single investment thesis presented at a charity investing conference (the Sohn Conference) escalated into a prolonged, multi-front conflict involving Allied's aggressive countermeasures against Einhorn personally, extensive but ultimately slow-moving regulatory scrutiny, and years of public dispute over whose numbers — Einhorn's or Allied's — actually reflected reality.

The book's early sections establish Einhorn's investment philosophy and process, walking through how Greenlight Capital typically evaluates a potential short position by examining the true underlying economics of a business, comparing that reality to reported earnings, and assessing whether the incentives of company decision-makers are actually aligned with outside investors — a framework Einhorn presents as standard value-investing analysis applied specifically to identify overvalued or fraudulent companies rather than undervalued ones. Applying this framework to Allied Capital, Einhorn concluded the company was systematically overvaluing distressed loans in its portfolio to avoid recognizing losses that would have hurt its stock price and its ability to raise capital.

The middle sections of the book detail the escalating conflict that followed Einhorn's public short thesis: Allied's management aggressively challenged Einhorn's credibility, allegedly pursued his personal phone records, and lobbied regulators and lawmakers, while government agencies including the SEC, the Small Business Administration, and eventually the FBI became involved in investigations that, in Einhorn's account, moved with striking slowness and, at points, seemed to focus more on scrutinizing the short-sellers raising concerns than on the underlying allegations of accounting fraud itself. Einhorn documents specific instances of what he characterizes as regulatory failure — examinations that dragged on for years without conclusive action, and a broader pattern of institutional reluctance to challenge a company with political connections and lobbying resources.

The book closes with an epilogue, added for the updated edition, addressing Allied Capital's eventual dramatic decline and 2010 acquisition by Ares Capital at a steep discount to its former valuation — a resolution that arrived only after this book's original 2008 publication, and which Einhorn presents as ultimate, if very delayed, vindication of the original short thesis. Beyond the specific Allied Capital narrative, Einhorn uses the book to argue more broadly for the social and market value of public short-selling and open critical debate about company accounting, positioning aggressive, well-researched skepticism — even when it makes a company's management furious — as a check on corporate fraud that formal regulatory processes alone often fail to provide in a timely way.