New issuance of agency single-family MBS jumped 25 percent from December to January, according to a new Inside MBS & ABS ranking and analysis. The most likely explanation for the sudden jump in agency MBS issuance may be that new, more seller-friendly repurchase policies at Fannie Mae and Freddie Mac went into effect for loans sold after Jan. 1, 2013. The revamped policies generally provide that the government-sponsored enterprises will not seek repurchase or indemnification for loans that perform for the first three years after origination. In the case of Home Affordable Refinance Program loans, repurchases will be waived...[Includes one data chart]