Berkshire Hathaway Letters to Shareholders: 1965-2024

by Warren Buffett

Let’s look for a moment at the reinsurance business to understand why General Re could not on its own do what it can under Berkshire. Most of the demand for reinsurance comes from primary insurers who want to escape the wide swings in earnings that result from large and unusual losses. In effect, a reinsurer gets paid for absorbing the volatility that the client insurer wants to shed. Ironically, though, a publicly-held reinsurer gets graded by both its owners and those who evaluate its credit on the smoothness of its own results. Wide swings in earnings hurt both credit ratings and p/e ratios, even when the business that produces such swings has an expectancy of satisfactory profits over time. This market reality sometimes causes a reinsurer to make costly moves, among them laying off a significant portion of the business it writes (in transactions that are called “retrocessions”) or rejecting good business simply because it threatens to bring on too much volatility. Berkshire, in contrast, happily accepts volatility, just as long as it carries with it the expectation of increased profits over time. Furthermore, we are a Fort Knox of capital, and that means volatile earnings can’t impair our premier credit ratings. Thus we have the perfect structure for writing — and retaining — reinsurance in virtually any amount. In fact, we’ve used this strength over the past decade to build a powerful super-cat business. What General Re gives us, however, is the distribution force, te...