Reverse Engineering
from Buffett's 1996 Letter
I have mentioned that a mega-catastrophe might cause a catastrophe in the financial markets, a possibility that is unlikely but not far-fetched. Were the catastrophe a quake in California of sufficient magnitude to tap our coverage, we would almost certainly be damaged in other ways as well. For example, See's, Wells Fargo and Freddie Mac could be hit hard. All in all, though, we can handle this aggregation of exposures.
In this respect, as in others, we try to "reverse engineer" our future at Berkshire, bearing in mind Charlie's dictum: "All I want to know is where I'm going to die so I'll never go there." (Inverting really works: Try singing country western songs backwards and you will quickly regain your house, your car and your wife.) If we can't tolerate a possible consequence, remote though it may be, we steer clear of planting its seeds. That is why we don't borrow big amounts and why we make sure that our super-cat business losses, large though the maximums may sound, will not put a major dent in Berkshire's intrinsic value.