Insurance companies who grow return to investors

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Since the annual meeting, I have been looking at insurance cos who grow BV or return on investment and are selling at or below book.  The four I found are FFH, RNR, Lancashire and ACE.  GLRE is in this group but is selling at a premium to book.  Thanks to the board members we have had a good amount of discussion about FFH and Lancashire.  What about ACE and RNR?  RNR appears to have an about 20% return to shareholders as Lancashire and ace has about a 15% return.  TIA.

 

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