@kab60 underwriting income represents only about 22% of Fairfax's various earnings streams. This is much less than traditional P/C insurers (who are closer to 45% or more I think). Does this split matter in your analysis?
PS: Moving forward investment gains will be a larger source of earnings for Fairfax than underwriting income. And we now have $3.9B in excess of FV over CV... this is a leading indicator of how strong investment gains will be in the coming years (with Q2 being a good example). Traditional P/C insurance companies do not have this income stream at all (let alone $3.9B sitting there waiting to be harvested).
Of course, there are other examples of hidden value not captured in the $3.9B, with BIAL being a good example. This is a massive asset that is growing in value each year. Traditional P/C insurance companies do not have these assets as well.