Ginnie Mae guaranteed more than $109.7 billion in mortgage-backed securities in the fourth quarter of 2012, with Wells Fargo and Chase Home Finance accounting for nearly half of the issuance, according to an Inside FHA Lending analysis of issuer data. Ginnie Mae issuers securitized 9.1 percent more in government-backed mortgages in the fourth quarter than in the previous quarter while issuance was significantly higher year-over-year, rising a whopping 44.8 percent. Although the top five Ginnie Mae issuers combined for 56.6 percent of the quarter’s total Ginnie Mae MBS production (Wells and Chase were on top with a combined 45.8 percent market share), 10 lower-ranked issuers posted ... [1 chart]