Home prices in Greater Des Moines increased 4.6 percent in February compared with February 2012, according to real estate analytics firm CoreLogic Inc. However they dropped 0.4 percent from January to February of this year. Home prices nationwide increased 10.2 percent on a year-over-year basis, marking the the biggest year-over-year increase since March 2006 and the 12th consecutive month that U.S. home prices have risen.