New issuance of single-family MBS by Fannie Mae, Freddie Mac and Ginnie Mae jumped by 16.9 percent from the second quarter of 2012 to the third quarter, according to a new market analysis and ranking by Inside MBS & ABS. The three agencies issued a total of $436.0 billion of single-family MBS during the third quarter, raising year-to-date issuance to $1.194 trillion. That was up 45.6 percent from the first nine months of 2011. Over half (50.3 percent) of the agency production in 2012 has come...[Includes one data chart]