Jamie Dimon is enlarging his bank’s footprint in the Big Apple. JPMorgan Chase, along with Mayor Bill de Blasio, announced Wednesday it will build a new, 70-story skyscraper on the site of its current headquarters at 270 Park Ave., the first major project under the city’s Midtown East Rezoning Plan. “With a new headquarters at 270 Park Avenue, we are recommitting ourselves to New York City while also ensuring that we operate in a highly efficient and world-class environment for the 21st Century,” Dimon said in a statement. The bank, which Dimon has led since 2005, is expected to move 15,000 of its employees to the ... (full story)