Investors showed Electronic Arts stock a red card on Thursday after the videogame maker warned of slowing demand for its soccer-related titles. Shares in the Madden NFL publisher plummeted 18% to $117.36, making EA the biggest loser. The selloff came after EA said in an 8-K form filed after Wednesday’s close that it expected bookings to fall to $2.22 billion for the three months ended Dec. 31, well below previous guidance of between $2.4 billion and $2.55 billion.