Freddie Mac plans to take another step into the subprime market with a program through which it will buy newly-minted mortgages. "I don’t think it really is a leap from what we’ve been doing. It’s more of a continuum," said David Andrukonis, the government-sponsored enterprise’s chief credit officer. Currently, Freddie buys A- loans on a flow basis through a variety of programs. The GSE has also been active as a guarantor of subprime securitization deals,