New production of mortgage-backed securities declined measurably – and in every product category – during the fourth quarter of 2005, according to an exclusive analysis by Inside MBS & ABS. But while new MBS issuance dropped 9.2 percent during the fourth quarter, 2005 still ended as the second strongest year ever in terms of annual volume. An estimated $2.143 trillion of new MBS were generated during last year, a 13.8 percent gain from 2004.… [One data table included]