Analysts at Wells Fargo Securities worry that the post-election rate shock is not a positive omen for bank and overseas investors in MBS. “Since the U.S. presidential election, the 10-year yield has sold off by 55 basis points in a matter of two weeks,” they said in a recent client note. “Although banks and overseas investors are typically looking to buy on dips, large selloffs do not bode well for demand from these investors right after a rate shock. For banks, a large rate shock results in a hit on their regulatory capital.” According to their calculations, during the week ending Nov. 9, 2016, the net realized gains on bank portfolios declined...