Short Put

What is a Short Put?

A short put means you sell a put option without any other position attached to it. You collect premium upfront and take on the obligation to buy 100 shares at the strike price if the stock drops below it. You are making a bullish bet that the stock will stay above your strike through expiration.

This is one of the simplest option selling strategies. You are selling someone else insurance against the stock dropping. If the stock stays above your strike, the put expires worthless and you keep the full premium. If it drops, you may end up buying shares at the strike price.

How to Set It Up

• Sell 1 put option at a strike price where you would be comfortable buying the stock
• Strike selection: OTM puts are safer but pay less premium. ATM puts collect more premium but have a higher chance of assignment. Most traders sell at the 20-30 delta range for a good balance.
• Expiration: 30-45 days out captures the fastest portion of time decay.
• Margin requirement: Your broker will require margin unless you have cash to cover the full assignment. A cash-secured put means you set aside enough cash to buy the shares.

You collect the premium immediately. Time decay works in your favor every day.

When to Use This Strategy

Use a short put when:

• You are bullish or neutral on the stock
• You would not mind owning the stock at the strike price
• Implied volatility is elevated, making the premium attractive
• You want time decay working in your favor
• You want a higher probability trade than buying calls

Avoid selling naked puts on stocks you do not want to own. If you get assigned, you will be holding shares of something you do not believe in.

Example Trade

Stock XYZ is trading at $100. You are bullish and would happily buy it at $95.

• Sell 1 XYZ $95 put expiring in 30 days for $2.00
• Premium collected: $2.00 x 100 = $200
• Max profit: $200 (if XYZ stays above $95)
• Max loss: ($95 - $2) x 100 = $9,300 (if XYZ goes to zero)
• Breakeven: $95 - $2 = $93

Scenario 1: XYZ stays at $100 or goes higher. The put expires worthless. You keep $200. That is a 2.2% return on the $9,300 capital at risk in 30 days.

Scenario 2: XYZ drops to $90. You get assigned and buy 100 shares at $95. Your effective cost basis is $93 (strike minus premium). You are down $300 on paper, but you own a stock you wanted at a discount.

Scenario 3: XYZ drops to $70. You buy shares at $95 with an effective cost of $93. You are down $2,300. This is the real risk of selling puts.

Risk and Reward

• Max profit: The premium collected. $200 in our example. Achieved when the stock stays above the strike at expiration.
• Max loss: (Strike - premium) x 100. Substantial if the stock drops sharply. In theory, the stock can go to zero.
• Breakeven: Strike minus premium. $93 in our example.

The probability of profit is typically 65-80% when selling OTM puts, but the losses when they happen can be much larger than the premium collected. Risk management is essential.

Tips and Common Mistakes

• Only sell puts on stocks you actually want to own. This turns assignment from a loss into an opportunity.
• Manage winners early. Buy back the put at 50% of max profit. If you sold for $2.00, close it when you can buy it back for $1.00.
• Have a stop loss plan. If the put doubles in value (you sold for $2, it is now $4), consider closing to prevent a bigger loss.
• Be aware of earnings and catalysts. A big drop after earnings can blow through your strike quickly.
• Margin can amplify losses. If you are selling naked (not cash-secured), a big drop can create a margin call.

Related Strategies

• Cash-Secured Put — same trade with full cash set aside to cover assignment
• Bull Put Spread — add a long put below for defined risk
• The Wheel — combines short puts with covered calls for systematic income