Construction: Sell 1 put option.
Function: Directional, premium collection.
When To Use: When you feel the underlying stock will stay above the short put strike price by expiration. Or, if you want to attempt to purchase the stock (100 shares per option) at a lower price than it is trading at the time of selling the option.
Breakeven: Short put breakeven is calculated by subtracting the premium received by the options strike price.
Max Gain: The maximum gain for a short put option is equal to the credit received by selling the option.
Max Loss: The maximum loss for a short put is equal to the options strike price. In other words, max loss is unlimited until the underlying stock reaches zero.
Key Concepts: A short put is a bullish, single-option strategy in which the option seller believes the price of the underlying stock will be above the strike price at or prior to expiration.
Example: If a stock is trading for $200 and the trader wants to buy it for $190, they can sell the $190 strike put option while collecting a $2 premium. If the stock falls to $190 by expiration, the trader will be forced to buy 100 shares for $190 (which was their goal) while keeping the $2 upfront premium received. On the other hand, if the stock never falls to $190, the trader simply keeps the $2 premium.