Regardless of whether the White House and Congress come to a debt ceiling deal before the fast approaching Aug. 2 deadline, agency MBS are in for a rough ride, experts say. Last week, Moody’s Investors Service and Standard & Poor’s lit a fire under the debt talks and sparked widespread consternation throughout the MBS arena when they announced that each may cut the U.S. credit rating two double-A within three months if there isn’t a “credible” agreement to address the U.S. debt burden. Consequently, Moody’s placed on review for possible downgrade ...