Groupon is trading down amid broad-market weakness, though no direct company-specific catalyst has been established. - On September 28, 2026, shares are down 5.07% at $20.22; no clear company-specific announcement has been identified. - Major U.S. indices are down more than 0.5%, as markets face pressure from rising oil prices, climbing Treasury yields and renewed inflation concerns following escalated U.S.-Iran tensions.