Morgan Stanley has picked Dallas for a major expansion of its banking empire outside New York City — accelerating Wall Street’s migration to Texas following the election of Mayor Zohran Mamdani, The Post has learned. The financial giant plans to relocate up to 4,800 jobs to the state by 2031, passing over Alpharetta, Georgia, according to municipal filings reviewed by The Post. The firm will anchor a new $1.3 billion, 709,000-square-foot skyscraper in the fast-growing Texas metropolis known to financiers as “Y’all Street”. The Wall Street behemoth led by CEO Ted Pick — which began exploring options outside the Big...