Fannie Mae and Freddie Mac were both active this week with multifamily MBS transactions, but they’ll have to double-time it if they plan to match last year’s levels. The odds are against them. Fannie’s multifamily new business volume came to $13.8 billion through August 2014, compared with $20.4 billion the year before. The government-sponsored enterprise would have to crank out another $15 billion in the last four months of 2014 to match the 2013 total of $28.8 billion. For rival Freddie, multifamily new business activity totaled...