The U.S. Treasury has sold its final portion of $225 billion in mortgage-backed securities it bought during the 2008 financial crisis, the government said Monday. The Treasury Department said the sales of securities issued primarily by mortgage companies Fannie Mae and Freddie Mac provided the government $25 billion in interest. The government began selling the securities one year ago, and the final sales were completed last week. "The successful sale of these securities marks another important milestone in the wind down of the government's emergency financial crisis efforts," said Mary Miller, the Treasury's assistant secretary for financial markets.