Chase Home Finance knocked Bank of America off its second-place perch and joined top-ranked Wells Fargo as the dominant Ginnie Mae mortgage-backed securities issuers in 2012, according to the Inside Mortgage Finance Database. Together, Wells Fargo and Chase accounted for 53.3 percent of the $100.6 billion Ginnie Mae MBS market in the second quarter of 2012, which grew 24.4 percent from the first quarter and a whopping 42.2 percent from the same period a year ago. Wells led with $42.6 billion and a commanding 42.2 percent piece of the Ginnie Mae MBS market, thanks to ... ( 2 charts)