Mistakes in assessing insurance risks can be huge and can take many years — even decades — to surface and ripen. (Think asbestos.) A major catastrophe that will dwarf hurricanes Katrina and Michael will occur — perhaps tomorrow, perhaps many decades from now. “The Big One” may come from a traditional source, such as wind or earthquake, or it may be a total surprise involving, say, a cyber attack having disastrous consequences beyond anything insurers now contemplate. When such a mega-catastrophe strikes, Berkshire will get its share of the losses and they will be big — very big. Unlike many
  
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