MBS investors this week continued to bid up the price of agency product in the wake of rock-bottom oil prices and economic fears about Asia, Europe and any oil-producing nation that relies too heavily on the energy sector. According to figures compiled by MBS Quoteline, at one point this week investors were paying 105.10 for Fannie Mae MBS with a coupon of 3.5 percent. Back in October the bid on the Fannie 3.5 was a mere 101.83. “Who would pay 105...