Bowing to pressure from investors – in particular, Carl Icahn – American International Group this week rolled out a blueprint to increase shareholder value, including a partial spin-off of its top-ranked mortgage insurance division, United Guaranty Corp. Although both AIG and UGC were not entertaining questions on the details, a spinoff of the MI business could come by mid-year with up to 19.9 percent of the unit being sold to the public. Eventually, AIG said...