Hock, yes, definitely know what you may owe if you have to buy the stock - know the risk. That burnt me early on in my margin account years ago when it all seemed so easy to make money. Suddenly I owned stock before the expiration date and I had a margin call. That was NOT fun.
However, I did say "and only sell puts when you're willing to own the stock." Maybe that doesn't spell it out but it does imply that you may end up with the stock so you better be happy to own it at the strike price for which you sold the put.
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