I haven't done that analysis, but looking at historical P/B ratios I see a normal range from 0.6x to ~1.5x. There was an extreme low around 0.4x in 2009 after an extreme high in 2008 around 1.7x.
Current P/B is around 0.8x.
Given that BV per share has grown in the high single digits, if that continues and P/B moves back up to 1.0x in three years, you would see mid-low teens growth from $38 to ~$60. Overshooting 1.0x on P/B back to some historical normal high, would obviously be a nice cherry on top.
CNA's underwriting has improved in recent years, but investment income is hampered by the low rate environment. Plus, the natgas exposure is a real wildcard. It's so low right now, and much lower than when L bought a lot of their assets there. Does it stay below $3-4 or does it move back up to high single digits? Can we dare to dream of double digit natgas prices?
It's a full position for me (~12%), but maddening to watch. The non-answers about Q4 stock buybacks on the conference call was curious. It may mean that they have something in the works for their excess capital, or it may just be a sit and wait approach from management.