Is this explanation accurate?
Naked Put Definition
Investopedia is a good source. Yes that is an accurate definition. In simple terms, I agree to buy 100 shares of a stock at $XXX. For that 'privilege', someone pays me $X/share. What I do is find a price below the current price that I would be willing to buy 100 shares of the stock (the strike price), and I sell the Put. So I collect what is called a premium which is mine to keep regardless of what happens.
Here's an example using Apple: AAPL's current price is $133/share. To buy 100 shares, you would need $13,300. AAPL was recently over $140/share so it is already trading at a discount to it's high. But let's say I was willing to buy it at $130/share. (Still requires $13,000 to make the purchase). I go and look at the options tables and see that the February 5 $130 PUT is going for $1.30. That means that someone would pay me $1.30/share for the right to put their shares to me if the price of AAPL is below $130 on Friday Feb 5th. That is the only time/date that matters. Whatever it does between now and then means nothing. So... I have collected $130 that is mine to keep no matter what happens on Friday. If the stock finishes 'out of the money' meaning it is above $130, I don't have to buy the stock and I have $130 to show for 4 days work. If the stock drops to anything below $130, I have to buy it at $130/share. Now what happens if I want out of the trade? As the price gets closer to the strike price ($130), the value of the premium($1.30/share) will go up. So let's say I decide I don't want AAPL at $130, but the price drops to $131/share and I am getting nervous. The price of that premium that I sold will now be higher because the likelihood of it being assigned is also higher (There is another thing called decay, but I won't get into that here) It might go to.. say $1.50/share. In this case, I can close out by buying back that contract at $1.50/share. When the dust settles, I will have lost $20 on the exchange, but I have no obligation to buy APPL anymore. Conversely, if AAPL goes up, the value of the premium will drop. So let's say AAPL goes to $135/share, the premium might go to $1.00/share. I could buy it back (I wouldn't) and I would still be $.30 ahead or $30 in my pocket. I would just let it go until Friday and expire 'out of the money' and the original $130 is mine to keep.
Sorry if this is complicated and boring. I will write about one that is a better way to start learning about options in a little bit.