The Number

Alex Berenson covered Wall Street for the New York Times and wrote this history of how quarterly earnings per share came to dominate American corporate behaviour, and of what that dominance produced.

The historical section traces the development of American accounting and securities regulation from the nineteenth century through the establishment of the Securities and Exchange Commission, the professionalisation of auditing, and the emergence of the sell-side analyst. Berenson shows how a single number, earnings per share, came to be the focus of company disclosure, analyst forecasting and share price reaction, and how the growth of the analyst community created a consensus estimate that companies were then expected to meet exactly.

His argument is that meeting the number became the objective and that everything else followed from it: earnings management through reserve accounts and revenue recognition timing, the pressure on auditors whose consulting revenue depended on the client, the compensation of executives in options whose value depended on the share price, and eventually outright fraud at Enron, WorldCom and elsewhere. He documents the specific accounting techniques. The book was published in 2003, after Sarbanes-Oxley, and the auditor independence rules it argues for were partly adopted. Berenson is a reporter rather than an accountant and simplifies some technical material. The history of how one number came to dominate is the book's contribution.