Berkshire Hathaway Letters to Shareholders: 1965-2024

by Warren Buffett

Selecting the S&P 500 as our bogey was an easy choice because our shareholders, at virtually no cost, can match its performance by holding an index fund. Why should they pay us for merely duplicating that result? A more difficult decision for us was how to measure the progress of Berkshire versus the S&P. There are good arguments for simply using the change in our stock price. Over an extended period of time, in fact, that is the best test. But year-to-year market prices can be extraordinarily erratic. Even evaluations covering as long as a decade can be greatly distorted by foolishly high or low prices at the beginning or end of the measurement period. Steve Ballmer, of Microsoft, and Jeff Immelt, of GE, can tell you about that problem, suffering as they do from the nosebleed prices at which their stocks traded when they were handed the managerial baton. The ideal standard for measuring our yearly progress would be the change in Berkshire’s per-share intrinsic value. Alas, that value cannot be calculated with anything close to precision, so we instead use a crude proxy for it: per-share book value. Relying on this yardstick has its shortcomings, which we discuss on pages 92 and 93. Additionally, book value at most companies understates intrinsic value, and that is certainly the case at Berkshire. In aggregate, our businesses are worth considerably more than the values at which they are carried on our books. In our all-important insurance business, moreover, the difference...