New issuance of agency single-family MBS in October was almost even with the previous month, but there was a sharp swing of market share between the two government-sponsored enterprises, according to a new Inside MBS & ABS ranking and analysis. Total new MBS issuance by Fannie Mae, Freddie Mac and Ginnie Mae came to $113.99 billion last month, a modest 0.5 percent decline from September. But while Fannie production slumped 11.5 percent, Freddie ... [Includes two data charts]