Flagstar Bank priced its first post-crisis jumbo MBS this week and other big banks could start issuing deals this year, according to industry analysts. Since 2010, the main issuers in the fledgling jumbo MBS market have been nonbanks, with banks content to hold jumbos in portfolio. In recent years, the only bank to issue prime non-agency MBS has been JPMorgan Chase, which has packaged jumbos with some mortgages eligible for sale to the government-sponsored enterprises in its deals. The $443.8 million Flagstar Mortgage Trust 2017-1 follows...