The Mortgage Bankers Association is sticking with its proposal to keep Fannie Mae and Freddie Mac alive, but with new charters, while inviting other players to compete with the two giants in the securitization of conventional mortgages. The trade group this week proposed a utility-like model for the re-christened government-sponsored enterprises. They would inherit the personnel and systems the GSEs now have, but become limited-purpose, publicly owned securitization businesses under tight government regulation. Other entities could apply...