How to Sell Puts

What Is a Short Put?

A short put, also called a naked put, uncovered put, or bull put, is established by selling a put option to open a position. The seller receives the full premium of the contract upfront. In exchange, the seller takes on the obligation to buy 100 shares of the underlying at the strike price if the put buyer chooses to exercise.

The strategy is bullish to neutral. The seller does not need the underlying to rally to profit, they need it to stay above the short strike through expiration. 

Understanding how puts work is a prerequisite before selling them. Put options give the buyer the right to sell 100 shares at the strike price. When you sell that right, you take the other side: the obligation to buy.

Max profit is capped at the credit received at trade entry. The put expires worthless if the underlying closes above the strike at expiration, and the seller keeps the full premium. 

Max loss occurs if the underlying falls to zero. The short put seller is obligated to buy 100 shares at the strike price regardless of where the stock is trading. The credit received reduces the effective cost basis, but the loss potential is substantial. For a $50-strike short put sold for a $2.00 credit, the maximum loss is $4,800 per contract. 

Breakeven is the strike price minus the credit received. In the example above, the position breaks even at $48.00. Any close above $48.00 at expiration yields a profit.

Naked Put vs. Cash-Secured Put

The short put strategy takes two different forms depending on account type and available capital. 

Naked put (The Works and Basic trading level margin accounts): The buying power requirement is set by the broker's margin formula, typically a percentage of the notional value of the position. This is less than the full cash-secured requirement. Naked puts carry the same risk profile as cash-secured puts but require less capital to establish. 

Cash-secured put (cash accounts, IRA accounts, and Limited trading level margin accounts): The account must hold the full notional value of the put contract as available options buying power. Selling a 50-strike put requires $5,000 of available cash ($50 strike x 100 multiplier). This structure requires more capital but is available in all account types at tastytrade. 

Short puts are permitted in all tastytrade account types. The account type determines whether the put is treated as naked or cash-secured.

When Traders Sell Puts

Traders sell puts under specific market and volatility conditions.

Neutral to bullish directional bias. The short put profits when the underlying stays above the strike. It does not require a rally, only the absence of a significant decline.

Elevated implied volatility. Implied volatility inflates options prices. Selling puts when IV is elevated means collecting more premium for the same strike and expiration. When IV subsequently contracts, the position benefits from both theta decay and vega contraction.

Theta decay as a tailwind. The short put carries positive theta, meaning the position gains value with each passing day as the extrinsic value of the option erodes. This decay accelerates as expiration approaches, particularly for at-the-money options.

Willingness to own shares. Some traders sell cash-secured puts at strikes where they are comfortable owning the stock. If assigned, they acquire 100 shares at an effective cost basis equal to the strike minus the credit received.

Selling Puts vs. Buying Stock

Selling a put at a strike below the current stock price is often compared to buying shares outright. Both strategies are bullish, but they differ in several ways.

Defined Risk Alternative: Short Put Vertical Spread

Traders who want to limit downside exposure can convert the naked short put into a short put vertical spread. This involves simultaneously buying a lower-strike put in the same expiration.

The long put acts as a hedge. Max loss is now defined: spread width minus the credit received, multiplied by 100. The trade-off is a reduced credit, since part of the premium collected funds the long put.

The short put reduces cost basis compared to buying stock at the current price. It also generates income even if the stock stays flat. The trade-off is capped upside, as the seller does not participate in a rally beyond the credit received.

For accounts where buying power is a constraint, or for traders who prefer defined risk, the short put vertical is the more capital-efficient structure.

Short puts are not hold-to-expiration trades by default. Active management reduces risk and locks in profits before they erode.

Risk management: Some traders close short puts early based on the amount of time remaining until expiration, changes in implied volatility, or based on the underlying's price. Closing a short put early eliminates the risk of assignment and frees up buying power that was previously held as collateral.

Rolling the position: If the underlying declines toward the strike, one management approach is to roll the short put, which consists of buying back the current put and selling a new put at a lower strike and/or further expiration. Rolling can extend duration, collect additional premium, and move the strike away from the current stock price.

Assignment: If the put expires in-the-money by $0.01 or more, it is automatically exercised. The seller is assigned 100 long shares at the strike price. Plan for assignment in advance. If the account has sufficient equity to hold the shares, the assignment converts the position to a stock position at the effective cost basis.

Expiration risk: Short options carry after-hours risk on the day of expiration. Exercise and assignment can occur after the close if the underlying moves significantly. Traders who do not want to take assignment should close the position prior to expiration.