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Bear Put Spread Calculator \u2014 Bearish Defined Risk Strategy
By Worldtickers ·
Use our free bear put spread calculator to estimate max profit, max loss, and breakeven for a vertical debit spread. Enter your strikes, premiums, and contract size to see the full payoff.
This bear put spread calculator \u2014 bearish defined risk strategy tool focuses on use our free bear put spread calculator to estimate max profit, max loss, and breakeven for a vertical debit spread. Enter your strikes, premiums, and contract size to see the full payoff. Use it to test option prices, strikes, premiums, expiration assumptions, and strategy outcomes so you can compare payoff scenarios, break-even levels, risk, and potential reward before placing an options trade.
Bear Put Spread Calculator
Bear Put Spread Calculator
Evaluate the risk/reward of a bear put spread (debit spread).
What Is a Bear Put Spread?
A bear put spread is a vertical spread strategy that profits when a stock declines. It involves two legs: you buy a put option at a higher strike price and simultaneously sell a put option at a lower strike price on the same stock with the same expiration date. The higher strike put costs more than the lower strike put premium you receive, so you pay a net debit to enter the position.
The strategy is popular among moderately bearish traders because it provides defined risk exposure to downside movement. Unlike buying a single put option, the bear put spread costs less because the short put offsets some of the premium. The trade-off is that your profit is capped at the lower strike price. If the stock falls dramatically, you miss gains beyond the short put strike.
The bear put spread is one of the most commonly used options strategies for targeted bearish bets. It is ideal when you have a specific price target in mind and want to limit your upfront cost while accepting a capped profit potential.
How to Use This Calculator
The calculator takes the strikes and premiums for both puts and the number of contracts to produce a complete payoff analysis.
Higher Strike (Long Put)
Enter the strike price of the put you are buying. This is the higher of the two strikes. The long put gives you the right to sell 100 shares at this price. This put is more expensive because it is closer to the current stock price (or at the money).
Lower Strike (Short Put)
Enter the strike price of the put you are selling. This is the lower of the two strikes. The short put obligates you to buy 100 shares at this price if exercised. This put is cheaper because it is further out of the money. The difference between the two strikes determines the maximum profit potential.
Put Premiums
Enter the premium for each put. The long put premium is what you pay. The short put premium is what you receive. The difference (long premium minus short premium) is your net debit, which is your maximum loss.
Number of Contracts
Enter how many spreads you plan to trade. Each spread consists of one long put and one short put. The calculator scales the output by the number of contracts.
Formula
The key formulas for a bear put spread are:
Net Debit = Long Put Premium — Short Put Premium
This is the amount you pay to enter the position and represents your maximum loss per share.
Max Profit = (Higher Strike — Lower Strike) — Net Debit
This occurs when the stock closes at or below the lower strike at expiration. The long put is in the money by the full strike width, and the short put is at the money.
Max Loss = Net Debit
This occurs when the stock closes at or above the higher strike at expiration and both options expire worthless.
Breakeven = Higher Strike — Net Debit
The stock must fall below this price for the spread to be profitable at expiration.
Examples
Example 1: Bear Put Spread on AAPL
AAPL is trading at $150. You buy the $150 put for $5.00 and sell the $140 put for $2.00, for a net debit of $3.00 ($300 per spread). Your maximum profit is ($150 — $140) — $3 = $7 per share, or $700 per spread. Your maximum loss is the $300 net debit. Your breakeven is $147. If AAPL falls to $140 at expiration, you achieve maximum profit. If AAPL falls to $130, you still make $700 because the short put caps your downside at $140.
Example 2: Tight Spread on MSFT
MSFT is trading at $400. You buy the $400 put for $8.00 and sell the $390 put for $4.50, for a net debit of $3.50 ($350 per spread). Max profit is ($400 — $390) — $3.50 = $6.50 per share, or $650 per spread. Breakeven is $396.50. This is a $10-wide spread, meaning you profit from any move below $396.50 down to $390. The risk-reward ratio is $350 risk for $650 reward, which is approximately 1:1.86.
Example 3: Wide Spread for Bigger Move
A stock is at $100. You buy the $100 put for $5.00 and sell the $80 put for $1.50, for a net debit of $3.50 ($350 per spread). Max profit is ($100 — $80) — $3.50 = $16.50 per share, or $1,650 per spread. Breakeven is $96.50. This wider spread costs more but offers a higher potential profit. The risk-reward is $350 risk for $1,650 reward, or approximately 1:4.71. However, the stock needs to fall below $96.50 to profit, compared to just $96.50 for the tighter spread.
Tips
Choose Strikes Based on Your Price Target
The lower strike should be at or near your target price for the stock. If you think AAPL will fall to $135, set the short put at $135 (not $140). This gives you more room for profit. If the stock falls past the short put, you miss the additional gains. The lower strike is effectively your profit target for the trade.
Consider the Risk-Reward Ratio
A bear put spread with a wider strike width has a better risk-reward ratio (more potential profit per dollar risked) but costs more and requires a bigger move. A narrower spread costs less but has a lower maximum profit. Evaluate whether the risk-reward ratio justifies the trade given your conviction level and the stock's historical movement patterns.
Use Monthly Expirations for Trend Trades
Monthly expirations give the stock more time to reach your target. If your thesis is based on a gradual trend (e.g., a stock declining after earnings), a 30-45 day expiration provides enough time for the move to develop. Weekly expirations are better for event-driven trades where you expect a quick, sharp move.
Close Early to Lock in Profits
You do not need to hold a bear put spread to expiration. If the stock falls and the spread gains value, you can close it early by selling the long put and buying back the short put. This locks in your profit and eliminates the risk of the stock reversing before expiration. Many experienced traders close spreads when they reach 50-75% of maximum profit.
FAQ
What is a bear put spread?
A bear put spread is a vertical spread strategy that profits when a stock declines. You buy a put option at a higher strike price and simultaneously sell a put option at a lower strike price on the same stock with the same expiration date. The higher strike put costs more than the lower strike put premium you receive, so you pay a net debit to enter the position. The strategy provides defined-risk exposure to downside movement.
When should I use a bear put spread?
A bear put spread works best when you are moderately bearish on a stock and expect it to decline, but not dramatically. It is ideal when you want defined risk exposure to downside movement without the full cost of buying a naked put. The strategy is commonly used when a stock is expected to fall to a specific level within a certain timeframe, such as after negative earnings or a technical breakdown.
What is the maximum profit on a bear put spread?
The maximum profit is the difference between the two strike prices minus the net premium paid. For example, if you buy a $50 put for $4 and sell a $45 put for $2, your net debit is $2. The maximum profit is ($50 — $45) — $2 = $3 per share, or $300 per spread. This occurs when the stock closes at or below the lower strike at expiration.
What is the maximum loss on a bear put spread?
The maximum loss is the net premium paid (the debit). In the example above, the maximum loss is $2 per share, or $200 per spread. This occurs when the stock closes at or above the higher strike at expiration, causing both options to expire worthless. The defined-risk nature of the strategy is a key advantage over shorting stock or buying naked puts.
What is the breakeven for a bear put spread?
The breakeven price is the higher strike price minus the net premium paid. In the example above, the breakeven is $50 — $2 = $48. The stock must fall below this price for the spread to be profitable at expiration. Above this price, the spread loses money, with the maximum loss occurring at or above the higher strike.
How does the width of the strikes affect the trade?
The width of the strikes determines both the potential profit and the cost of the spread. A wider spread (larger difference between strikes) has a higher maximum profit but also costs more (higher net debit). A narrower spread costs less but has a lower maximum profit. Choose the width based on how much you expect the stock to fall and how much you are willing to pay for the position.
Can I close a bear put spread before expiration?
Yes. You can close the spread by selling the long put and buying back the short put in the market. The closing value depends on the stock price, time remaining, and implied volatility. Many traders close bear put spreads before expiration to lock in profits or cut losses, rather than holding to expiry and dealing with assignment risk.
What is the ideal stock movement for a bear put spread?
The ideal scenario is for the stock to fall to or slightly below the lower strike price at expiration. This maximizes the spread value and your profit. If the stock falls far below the lower strike, you miss additional gains (because the short put caps your downside). If the stock stays flat or rises, you lose the net premium paid.
How does implied volatility affect a bear put spread?
A bear put spread is a net buyer of options (you buy a more expensive put and sell a cheaper one), so it benefits from rising implied volatility. If IV increases after you enter the spread, the position gains value even if the stock does not move. Conversely, falling IV hurts the position. This is the opposite of credit spreads, which benefit from declining IV.
Should I use weekly or monthly expirations for bear put spreads?
Monthly expirations provide more time for the stock to reach your target, making them more forgiving. Weekly expirations offer cheaper entry (less time value) but require a faster move. Weekly spreads are better for event-driven trades (e.g., post-earnings), while monthly spreads are better for trend-based trades where you need more time for the thesis to play out.