Housingwire reports that the publishers of a Bank of America Merrill Lynch Securitization Weekly Overview say plans by Republicans to wind down the operations of Fannie Mae and Freddie Mac in next four years may be too ambitious, with a true transition expected to take up to six years. As the web site reports, the Obama administration missed its Jan. 31 deadline for filing recommendations with lawmakers on how to reform the government-sponsored enterprises. The U.S. Treasury is expected to release its own report on how to reform the GSEs this week.