Freddie Mac has begun pilot testing its new Dealer Direct system for swapping legacy participation certificates for new single securities with a select group of dealers, the government-sponsored enterprise said in an update issued this week. In transitioning to the single security, Freddie will give all investors in its existing MBS that have a 45-day payment cycle the option to exchange them for the new 55-day securities. That process will be transacted through the Dealer Direct electronic platform. Holders of legacy MBS will work...