https://www.cnbc.com/2018/07/09/groupon-grpn-stock-surges-on-report-its-seeking-a-buyer.html

Groupon gained as much as 13 percent Monday following a weekend report that the company is seeking a buyer.

Shares opened at $4.81 after closing Friday at $4.36. The stock at its peak was on track for its best day since February 2017, but quickly pared gains. Shares fell below $4.70 within the first half hour of trading.