Non-agency MBS investors showed strong appetite for $5.1 billion in vintage securities that were auctioned last week as part of the Dutch government’s efforts to unwind a bailout of ING. Industry analysts said the successful sale shows that demand for high-yielding, low-priced bonds remains strong. The MBS sold by the Dutch State Treasury Agency were largely backed by option adjustable-rate mortgages, according to Interactive Data, a firm that tracks fixed-income products. ING and the DSTA didn’t provide pricing information on the sale. According to talk among traders before the auction, Interactive Data said...