Shares of Sirius XM Radio (SIRI) +4.7% premarket after it raised its full-year net subscriber...

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

Shares of Sirius XM Radio (SIRI) +4.7% premarket after it raised its full-year net subscriber addition expectations by about 50%, helped by improving auto sales and the recovering economy. Sirius now sees net subscriber additions of 750K, up from a previous 500K+.