JPMorgan has big expansion plans, and St. Louis is among the U.S. cities in its crosshairs

JPMorgan Chase & Co. CEO Jamie Dimon was in Boston last week to celebrate the opening of the megabank’s first retail branch in Massachusetts. While there, he was asked to identify markets Chase was targeting following moves earlier this year into Washington, D.C., Philadelphia and Boston.

“Get a list of the top 50 — 75 — (cities) in America, look at ones we’re not in, and assume one day we’ll be in all of them,” Dimon said.

He continued: “I’m saying … get that list. You’ll…