(April 12, 2019, 11:54 AM EDT) -- NEW YORK — A federal district court applied the wrong legal standard in assessing shareholders’ post-dismissal motion for leave to amend their complaint in a securities class action lawsuit against restaurant chain Chipotle Mexican Grill Inc. and certain of its senior executives and determining that post-judgment amendment would be futile, the shareholders argue in an April 4 appellant brief filed in the Second Circuit U.S. Court of Appeals (Metzler Investment GmbH, et al. v. Chipotle Mexican Grill Inc., et al., No. 18-3807, 2nd Cir.)....