The pessimistic pricing in the secondary market for jumbo mortgage-backed securities with exposure to the oil industry might be unwarranted, according to Standard & Poor’s. The rating service completed a stress test on the 59 jumbo MBS issued in 2012 and beyond. “Assuming the entire oil-sector workforce in three major oil-producing states defaults on their mortgages, even under extreme economic stress, the incremental collateral pool losses ... [Includes three briefs]