Bull put spread guide: defined-risk premium selling for moderately bullish setups
A practical guide to bull put spreads, including why traders use them instead of naked puts, how to place strikes, and what a solid example looks like.
Why traders use a bull put spread instead of a naked put
A bull put spread keeps the core idea of a short put, getting paid on a moderately bullish thesis, but removes the open-ended downside of being assigned stock and riding it lower. The long put is what turns the trade into a cleaner, more limited-risk position.
That usually means less credit than a naked put, but it also means the trade is easier to size and easier to survive emotionally when the stock tests your thesis.
What the trade needs to work
You do not need a huge rally. You mostly need the stock to stay above the short put strike through expiration or to decay enough that you can close the spread early at a profit.
That makes the strategy useful when you are constructive on the name but are not expecting an explosive move higher.
How to place the short and long strikes
The short strike is the real thesis line. It should sit below a level you believe the stock can hold. The long strike is insurance. It caps the damage if the stock breaks lower.
A lot of weak bull put spreads come from traders thinking only about premium. Good ones start with structure on the chart and use the credit as a secondary check.
- Short strike near a level the stock has respected.
- Long strike far enough away to make the spread meaningful.
- Expiration long enough to avoid panic, short enough to keep theta useful.
When the strategy is a bad fit
A bull put spread is a poor fit when the stock is already losing support, earnings are close, or the chart is unstable enough that the short strike can get tagged in one ordinary move. It is also a weak trade when the premium is so small that the risk-reward feels cosmetic.
Defined risk does not make a low-quality entry become high quality.
Detailed examples
Concrete scenarios that show how this strategy can look in practice.
Example: bullish bias, but no desire to own shares
Scenario: A stock is trading at $88 and has been holding above a rising 50-day moving average. You think it can stay above $82 over the next month, but you do not want the share exposure that comes with a naked put.
Structure: Sell the $82 put and buy the $77 put in the same expiration, collecting a net credit with clearly capped downside.
Why it fits: The view is moderately bullish, not wildly bullish. The spread lets you get paid if the stock stays above the short strike while keeping the worst-case loss defined from the start.
Watchouts
- If the short strike sits inside obvious chart noise, the spread is too aggressive.
- Do not shrink the long wing too much just to make the return on capital look prettier.
- Check that the credit is worth the width and commissions.