Update: Burger King (NYSE: BKW) stock finished down 4.32% Tuesday after the company's morning announcement that it will merge with Ontario-based coffee-and-donut chain Tim Hortons Inc. (USA) (NYSE: THI). THI stock closed up 8.47%.
In contrast, when news of merger talks originated on Monday, and shares in both BKW and THI enjoyed significant gains and ended that trading session up 19.51% and 18.91% respectively.