Freddie Mac and Fannie Mae reduced their exposure to subprime mortgage-backed securities again in the second quarter of 2008, according to an analysis by Inside B&C Lending. Subprime MBS held by the government-sponsored enterprises fell to $92.77 billion in the period, down 8.3 percent from the previous quarter and 35.0 percent from the end of 2007... [Includes one chart]