The investment period for the remaining funds participating in the Public-Private Investment Program ended during the fourth quarter of 2012, with four funds exiting the program during that time. The Treasury Department said it earned a profit from the PPIP, which focused on investment in non-agency mortgage-backed securities, and most of the individual funds also turned significant profits. “Our ability to aid in the stability of the MBS market and deliver solid investment ... [Includes one data chart]