Freddie Mac this week rolled out a pilot program that aims to lay off credit risk on mortgages it buys to a group of offshore insurance firms, using Arch Capital Group as a conduit and manager. Initially, 12 lenders will be part of the program, including Freedom Mortgage, the nation’s fifth largest originator overall. Arch is the parent company of the nation’s largest private mortgage insurer. Industry sources told Inside The GSEs that Fannie Mae is working on a similar pilot, but details were sketchy. A Fannie spokesman would only say, “It’s a bit premature to comment.” And a source close to the matter added that Fannie is “always looking for innovative ways” to reduce risk.