 And let's say that you've got a lot of Nvidia and you really don't want to sell Nvidia, but you need to generate some income. Or maybe you're just afraid that if Nvidia goes down, you're going to see a loss of your money that you've invested. So you can sell covered calls against Nvidia. This is a fancy way for saying you can give someone else the right to buy that stock from you at a much higher price than you see today.