Earnings Video: Investors discount Groupon stock Add to ... Reuters Published Tuesday, Aug. 14 2012, 6:30 AM EDT Last updated Tuesday, Aug. 14 2012, 6:30 AM EDT Groupon shares hit an all-time low in after hours trading Monday after it reported a revenue miss, blaming Europe. Watch More Video: EU shrugs off downgrade, eyes Ukraine BlackBerry loses $4.4-billion Germany exports Christmas market cheer UAE exits Eurofighter Typhoon talks Zimbabwe tempts miners with ownership offer Thailand's contracting economy in the spotlight Target's holiday hijacked by hack To taper or not to taper? A tale of 2 central banks TransCanada's Girling defends Keystone XL Which vehicles make the grade for the U.S. insurance industry's highest safety award? Mark Zuckerberg unloads $2.3-billion worth of Facebook shares Russia and Ukraine defend pact EU applauds banking deal - but is it enough? Ukraine's Yanukovich says Russia bailout money not aimed against Europe Darden to spin off or sell Red Lobster Getting your portfolio into shape Airbus wins record AirAsia X deal Protests block traffic around EU summit venue Saab wins deal to sell 36 fighter jets to Brazil Europe stocks rally on Fed Comments AA More Related to this Story Past Picks Video: BNN Market Call's past picks Fees Video: How entrepreneurs can cut legal costs Video: Streetwise: Is Quebec sending the right signals?