The strength of the non-agency jumbo market is a major factor in efforts to reduce the government-sponsored enterprises’ market share, according to a former advisor for the Obama administration. “If the GSEs pull back too quickly, it will change the whole discussion,” said Jim Parrott, owner of Falling Creek Advisors and a senior advisor at the National Economic Council until earlier this year. “The political feedback will be very quick and ruthless. It would make GSE reform extremely difficult.” ...