(October 31, 2022, 1:57 PM EDT) -- NEW YORK — A federal district court erred in dismissing an investor’s complaint against Citigroup Global Markets Holdings Inc. over Citigroup’s alleged mismarketing of certain securities for lack of jurisdiction because the investor, proceeding pro se, “adequately established federal question jurisdiction” in pleading his claims, a Second Circuit U.S. Court of Appeals panel ruled in vacating and remanding....