Newly public ING U.S. (VOYA) is up 20% since its IPO 2 weeks ago, but only trades at 60% of book value compared to the average life insurer (MET, HIG, PRU) selling for near book, writes Andrew Bary. Not only that, but the company is misunderstood - it's more retirement-services specialist and asset manager (think PFG) than life insurer, and should command an even higher valuation. What's more the seller (ING) was forced by regulators to do so against its will, the ING CEO calling it a "significant destruction of capital." Spinoff & Reorg Profiles - rarely a fan of promoted IPOs - think's it's worth $31. With an easily digestible $6B market cap, it might be worth even more to an acquirer.