The article says: "Investors responded by pushing Mitsubishi shares down by 10%. The fuel test scandal has now erased half of the company's market value, and i

The article says: "Investors responded by pushing Mitsubishi shares down by 10%. The fuel test scandal has now erased half of the company's market value, and its shares are sitting at a record low." Shouldn't a 10% drop in their shares result in a 10% drop in the company's market value? Not 50%? I don't know much about this kinda stuff - please be chill.