Coal producer Walter Energy (WLT +4.9%) adds to gains following the resignation of its CEO Keith...

|About: Walter Energy, Inc. (WLT)|By:, SA News Editor

Coal producer Walter Energy (WLT +4.9%) adds to gains following the resignation of its CEO Keith Calder. Calder - who was CEO of Western Coal prior to being purchased by Walter - is leaving after just three months on the job, citing "differences of opinion concerning management philosophy."