Investors shying away from new jumbo MBS have expressed strong interest in the risk-sharing transactions offered by Fannie Mae and Freddie Mac. Demand for the transactions has been so high recently that some analysts are recommending that investors could see better returns from vintage non-agency MBS. Fannie Mae said about 75 investors initially bought into the $675 million in non-guaranteed bonds it offered, and Freddie Mac said about 50 investors initially bought into the $500 million in non-guaranteed bonds it offered. The deal has been very well received...