Sirius XM Radio (SIRI -1.6%) falls back on above-average volume with the anticipated sale of...

|About: Sirius XM Holdings Inc. (SIRI)|By:, SA News Editor

Sirius XM Radio (SIRI -1.6%) falls back on above-average volume with the anticipated sale of shares by Mel Karmazin this week or next sitting as an overhang. Though the block sales are part of 10b5-1 plan not related to any non-public information, SIRI has still taken a hit each time one of Karmazin's transactions is officially announced.