Facebook (FB +3.4%) and Groupon (GRPN +6.2%) are rallying strongly today; shorts may be covering...

|About: Facebook (FB)|By:, SA News Editor

Facebook (FB +3.4%) and Groupon (GRPN +6.2%) are rallying strongly today; shorts may be covering ahead of the weekend. Facebook's gains come 5 days before a lock-up on 10% of outstanding shares expires. CNBC's David Faber reports the company has been meeting with institutional investors to stoke interest in shares ahead of the expiration.