@calv When you sell Puts you’re guaranteeing that you will buy the shares at expiration if the shares are below the strike price. There are two ways to guarantee that depending on what your broker will allow you to do. One way is to have a margin account which says I don’t currently have the money but I can borrow it against my account to pay for the shares. The other way is to have the cash already in your account to secure the payment if necessary. This second way is simply called a Cash Secured Put. I prefer the latter way.