After rebounding strongly on Friday with the help of Amazon's Q2 report and LivingSocial data...

|By:, SA News Editor

After rebounding strongly on Friday with the help of Amazon's Q2 report and LivingSocial data (not to mention short-covering), Groupon (GRPN -9%) has tumbled below the $7 level once again. Expect shares to remain volatile ahead of August 13's Q2 report, which should clear up whether recent fears about slumping U.S. and European billings are justified.