Sept. 21, 2015: As the fallout from the cheating scandal worsens, Volkswagen stock takes a dive. Shares plunge 20 percent, or one-fifth of the automaker's total value, in a single day.
"No question that this is a big problem for Volkswagen and could lead to CEO Martin Winterkorn losing his job after all," Christian Stadler, a professor at Warwick Business School, tells CNN Money.