(April 13, 2016, 2:14 PM EDT) -- NEW ORLEANS — A federal district court did not err in partially granting a motion for class certification in a securities class action lawsuit because its reasoning is in line with U.S. Supreme Court and Fifth Circuit U.S. Court of Appeals precedent, investors argue in an appellee brief filed March 28 in the Fifth Circuit (Erica P. John Fund Inc. v. Halliburton Co., No. 15-11038, 5th Cir.)....