Mealey's (May 14, 2019, 2:01 PM EDT) -- NEW YORK — A federal district court did not err in ruling that American Express Co. (AmEx) and certain of its executive officers had no duty to update investors regarding the state of ongoing discussions the company was having with Costco Wholesale Corp. as negotiations over a possible renewed agreement with Costco’s American affiliate deteriorated, a Second Circuit U.S. Court of Appeals panel ruled May 8 (Pipefitters Union Local 537 Pension Fund v. American Express Co., et al., No. 17-4142, 2nd Cir., 2019 U.S. App. LEXIS 14053)....