When Should You Use This Strategy?
You're mildly bullish to neutral on the stock and want to collect option premium rather than pay for a directional bet, with a defined maximum loss if the view is wrong. It suits a specific support level you expect to hold, rather than a strong conviction the stock will rally.
Who Benefits Most?
Income-focused traders who want a defined-risk alternative to a naked cash-secured put, and traders comfortable being assigned stock if the short put finishes in-the-money. It's a common building block for traders systematically selling premium across many underlyings rather than picking single directional bets.
Position Setup
The Bull Put Spread consists of the following legs:
- Sell 1 105 strike put at $8 premium
- Buy 1 95 strike put at $3 premium
Payoff at Expiration
The chart below shows profit and loss across a range of underlying prices for the default bull put spread setup. Open the interactive calculator to change strikes, premiums, and quantities and see the shape update live.
How Profit and Loss Work
Maximum Profit: $500 per default position
Maximum Loss: $500 per default position
Break-even Points: $100
Timing & Time Horizon
30–45 days
Most traders enter this strategy 30–60 days before their expected move, allowing enough time for the position to develop while avoiding excessive time decay on shorter-dated options.
Capital Requirements
Moderate margin requirement
How to Manage the Position
Most traders close at 50% of the maximum credit received, since the remaining premium shrinks fast relative to the risk of holding through a late reversal in the stock. If the stock drops toward the short put strike earlier than expected, some traders roll the spread down and out to a later expiration to reduce the chance of assignment.
- Monitor the position daily, especially as it approaches profitability
- Set clear profit targets and exit rules before entering
- Consider closing early to lock in gains rather than waiting for max profit
- Be prepared to cut losses if the thesis is wrong
Key Risks & What to Watch
- Margin call if stock drops sharply
- Assignment forces stock purchase
Common Variations
The default setup above is one version of the bull put spread. Traders adjust strike placement to trade off cost, probability, and payout:
Wide bull put spread
Place the long put well below the short put for a larger credit but a bigger maximum loss.
Key difference: More premium collected upfront in exchange for a larger worst-case loss if the stock drops through both strikes.
Best for: Traders confident the stock holds a wide support level.
Narrow, far-OTM bull put spread
Sell a put strike well below the current price with a tight protective long put just under it.
Key difference: Small credit, but a high probability of expiring worthless (max profit) since both strikes are unlikely to be reached.
Best for: High-probability income trades with minimal directional conviction.
Frequently Asked Questions
How is a bull put spread different from a cash-secured put?
Comparisons
The long put caps the maximum loss and reduces the margin required versus a naked cash-secured put, in exchange for a smaller net credit.
What's the ideal outcome for this trade?
When to Use
The stock stays above the short put strike through expiration, both puts expire worthless, and you keep the full net credit received at entry.
Why would I get assigned early on the short put?
Adjustments
Early assignment on the short put can happen if it moves deep in-the-money, especially near a dividend date, though it's uncommon before expiration for typical strike spacing.
How much margin does a bull put spread require?
Setup
Margin is generally limited to the width between the two strikes minus the net credit received, since the long put defines and caps the maximum loss.
Model Before You Trade
Every strategy performs differently based on entry price, strike selection, and premium levels. Use the interactive Bull Put Spread calculator to model the payoff with your expected entry, strikes, and premiums before committing capital.
Educational information only. This guide explains how the strategy works mathematically and typically behaves. It is not investment advice, and past performance does not guarantee future results. Options trading involves significant risk, including the potential loss of premium paid. Paper trade or use small positions while learning.