The Federal Reserve announced the asset managers who will guide the Fed’s purchase of $500 billion of MBS. The purchases will begin early in January and will conclude by the end of June. Here is a link to the FAQ on the topic at the Fed website.
There is one humorous question and response. The question asks if the purchases will expose the Fed to losses. In the answer the central bank states that credit losses are not a problem as FNMA and Freddic Mac guarantee principal and interest. Huh?