
McDonald's (MCD) is the worst Dow Jones stock Wednesday after the Centers for Disease Control and Prevention (CDC) announced it is investigating an E. coli outbreak linked to the fast-food chain's Quarter Pounder hamburgers.

McDonald's (MCD) is the worst Dow Jones stock Wednesday after the Centers for Disease Control and Prevention (CDC) announced it is investigating an E. coli outbreak linked to the fast-food chain's Quarter Pounder hamburgers.