Arch Capital Group last Friday acquired CMG Mortgage Insurance Co. from PMI Mortgage Insurance Co., a move that Moodys Investors Service sees as positive for Arch but credit-negative for existing players in the mortgage-insurance market that may have to contend with well-capitalized new entrants going forward.

Despite $400 million in claims payments and other costs related to Superstorm Sandy, fourth-quarter net income at Nationwide jumped to $176 million in 2012 from $35 million in the prior year.

Despite $400 million in claims payments and other costs related to Superstorm Sandy, fourth-quarter net income at Nationwide jumped to $176 million in 2012 from $35 million in the prior year.

In recent years, energy disasters such as the San Bruno Pipeline Explosion from September 2010 and Deepwater Horizon Oil Spill from April 2010 have had a major impact not only on the environment, but on consumers, businesses, and the insurance industry as well. Heres a look at 8 of the...