Short Put
Selling a naked put option to profit from a stable or rising price.
Profit / Loss Diagram
Short Put at expiration
What is this strategy?
The Short Put is a bullish option-selling strategy that generates premium income. By selling a put option you accept the obligation to buy the underlying asset at the strike price if assigned. It is a popular strategy among income traders looking to acquire assets at a discount.
Unlike the Short Call, the Short Put has defined risk capped at the option’s maximum intrinsic value (strike minus premium received). If price falls to zero, the most you lose is the strike less the premium. That makes it a more conservative strategy than the naked short call.
The Short Put suits long-term bullish traders willing to own the asset if assigned, viewing it as buying at a discount. It generates income through positive theta and is particularly effective when implied volatility is elevated. Breakeven is calculated by subtracting the premium from the strike price.
Construction
| Action | Instrument | Strike | Expiration | Example |
|---|---|---|---|---|
| SELL | 1 Put | ATM or slightly OTM | 30-60 DTE | -1 SPY Jun 420 Put |
Example
Scenario: SPY trades at $430. You are medium-term bullish and would be happy to buy at $420.
- Option Sold -1 SPY Jun 420 Put @ $3.50
- Credit Received +$350 (3.50 × 100 multiplier)
- Maximum Gain $350 (premium received)
- Maximum Loss $41,650 (420 strike − 3.50 premium × 100)
- Breakeven $416.50 (420 strike − 3.50 premium)
- Profit at Expiration at $430 $350 (maximum, if SPY > 420)
The Greeks
The short put carries positive delta: the position benefits as the underlying rises and suffers as it falls.
Increases with the passage of time. You gain value daily if price stays flat or rises.
Hurts when implied volatility rises, since buying the option back becomes more expensive.
Delta shifts against you as price falls, accelerating potential losses on declines.
Position Management
- 01 Define Your Target Purchase Price Selling a 420 put says you are happy buying at that price less the premium. Make sure it is genuinely a good entry level for you.
- 02 Close at 50% of Maximum Profit If price keeps its distance from the strike and your put shows a 50% gain, consider closing and redeploying later.
- 03 Assignment Management If you hold to expiration in the money, you will be long 100 shares. Have a clear plan: will you hold them, sell covered calls, or exit?
- 04 Roll Down If price falls but you still want income, close the current position and sell a new put at a lower strike.
- 05 Monitor Volatility Rises in implied volatility hurt the position. If the VIX spikes materially, your put is worth more, so consider closing early.