Wells Fargo was set to price its first post-crisis jumbo mortgage-backed security this week, marking a significant occasion for the sector. Wells is the largest originator of jumbo mortgages and the bank has been holding production in portfolio instead of issuing non-agency MBS. Company officials note that the $441.3 million Wells Fargo Mortgage Backed Securities 2018-1 Trust is in part a test of the MBS market by the bank. The deal is scheduled to close on Oct. 25. MBS issuers generally can't ...