A company called Clover Health Investments had its shares go up by 11% because some good things happened. Other companies also saw their shares go up a lot after they did well in sales, got new patents, or reported better results than expected. A patent is like getting permission to use something special that no one else can, and it's important for making medicine or other inventions. Companies report their results so people who own shares can see how well the company is doing and decide if they want to buy more or sell their shares. Read from source...