It did not. It made a loan.
It made a LINO. The Fed created an LLC, hired someone to run it and "loaned" it #30B to buy MBS. It is a fantasy to think of this as the Fed investing in their new LLC or a bailout for anyone or handout to JPM. It is simply a purchase of mortgage securities by the Fed, part of the credit bust predicted by Mises. Before there were people holding bad debt, now those people are holding cash. The Fed had the treasury print up that cash and they now "hold" the bad debt which they will sit on forever.