Bear Put Spread Explained: Risk $300 to Make $700

A bear put spread is a bearish options position with a fixed cost and a fixed floor on your profit. You buy one put, sell another put at a lower strike with the same expiration, and pay the difference. That net debit is the most you can lose. The distance between the strikes, minus the debit, is the most you can make.

This guide follows one complete hypothetical trade from entry to expiration: a $100 stock, a 100/90 put spread bought for $3.00, $300 at risk and $700 of maximum profit. We compare it with buying the put alone and with shorting 100 shares, show exactly where each one wins, and then cover what most explainers skip: how the position behaves before expiration, when to take profits early, what happens if your short put is assigned, how to choose strikes, how costs and taxes change the numbers, and the mistakes that turn a defined-risk trade into an undefined headache.

Important: every price in this article is a round, hypothetical number chosen so the arithmetic is easy to follow. XYZ is not a real company, and none of these premiums is a live quote. Real option prices move with the stock, time, implied volatility, interest rates and dividends. The formulas, however, are exact, and every calculation here is reproduced in our editorial test file.

What is a bear put spread?

The Options Industry Council (OIC) defines it plainly: a bear put spread "consists of buying one put and selling another put, at a lower strike, to offset part of the upfront cost." Because the put you sell has a lower strike than the put you buy, it is always cheaper, so "this strategy requires a net cash outlay (net debit) at the outset." Traders also call it a debit put spread or a long put vertical.

The position has two legs:

• Long put (higher strike). This is the engine. It gains value as the stock falls below the strike.
• Short put (lower strike). This is the subsidy. The premium you collect reduces the cost of the long put. In exchange, you give up any gain below the lower strike.

The OIC describes the trade-off directly: as the stock falls toward the lower strike, "the bear put spread works a lot like its long put component would as a standalone strategy. However, in contrast to a plain long put, the possibility of greater profits stops there." You are paying less for a smaller, more specific bet. Everything else in this article is about deciding whether that trade is worth it on a given stock, at given strikes, on a given date.

It is the mirror image of the bull call spread, which uses calls to make a capped bullish bet. If you have read that guide, most of the logic will feel familiar; the direction and a few practical details change.

The three numbers that define every bear put spread

For a spread held to expiration, three formulas tell you nearly everything:

Measure	Formula	Our example
Maximum loss	Net debit paid × 100	$3.00 × 100 = $300
Maximum gain	(Higher strike − lower strike − net debit) × 100	($100 − $90 − $3.00) × 100 = $700
Break-even at expiration	Higher strike − net debit	$100 − $3.00 = $97.00

The OIC states the same break-even rule: "Breakeven = long put strike - net debit paid." Its description of the outcomes is just as clean. The maximum loss happens when the stock finishes "above the higher (long put) strike price," because both puts expire worthless and you lose the debit. The maximum gain happens when the stock finishes "below the lower strike at expiration," and that ceiling holds "even if the stock were to decline further."

Two ratios are worth calculating before every trade. The reward-to-risk ratio is $700 ÷ $300, or about 2.33 to 1. The debit as a share of the width is $3.00 ÷ $10, or 30%. That second number is the more useful one. A spread that costs 30% of its width needs a real move to pay off; a spread that costs 75% of its width is mostly paying for an outcome that is already priced in, and leaves little room for reward. We come back to this when we discuss strike selection.

A full worked example: XYZ at $100

Assume XYZ trades at exactly $100.00. You expect it to drift lower over the next six weeks, perhaps toward $90 after a disappointing guidance update, but you do not expect a collapse. You look at options expiring in 45 days and see these hypothetical mid prices:

Option	Action	Premium per share	Cash per contract
XYZ 45-day $100 put	Buy 1	$4.20	−$420
XYZ 45-day $90 put	Sell 1	$1.20	+$120
Net		$3.00 debit	−$300

You enter both legs as a single spread order at a limit of $3.00. Using one order matters: if you buy the put first and then try to sell the lower put, the market can move between the fills, and you can end up holding a naked long put at a worse price than you planned. Most brokers let you enter the two legs together and specify the net debit you are willing to pay.

Your account now shows a long $100 put and a short $90 put. Your cash is $300 lower, before commissions. That $300 is your total risk on the position at expiration. Nothing that happens to XYZ above $100 can cost you more, and nothing that happens below $90 can earn you more.

The expiration payoff, price by price

At expiration, each put is worth its intrinsic value: the strike minus the stock price, or zero if that is negative. The spread is worth the long put's value minus the short put's value. Subtract the $3.00 you paid and multiply by 100 to get the result per spread:

XYZ at expiration	$100 put value	$90 put value	Spread value	Profit/loss per spread
$80	$20.00	$10.00	$10.00	+$700
$85	$15.00	$5.00	$10.00	+$700
$90	$10.00	$0.00	$10.00	+$700
$95	$5.00	$0.00	$5.00	+$200
$97	$3.00	$0.00	$3.00	$0
$100	$0.00	$0.00	$0.00	−$300
$105	$0.00	$0.00	$0.00	−$300

The shape is the reverse of a bull call spread. The position is flat at −$300 above $100, climbs one dollar of value for every dollar the stock falls between $100 and $90, and flattens again at +$700 below $90. There are three zones: total loss, a sloped zone, and full profit. Where XYZ lands relative to those zones is the entire trade.

Bear put spread vs buying a put vs shorting the stock

A bearish view can be expressed several ways. Here is the same hypothetical XYZ outlook implemented three ways: the $100/$90 spread for $3.00, the $100 put alone for $4.20, and a short sale of 100 shares at $100.

XYZ at expiration	Bear put spread	Long $100 put	Short 100 shares
$80	+$700	+$1,580	+$2,000
$85	+$700	+$1,080	+$1,500
$90	+$700	+$580	+$1,000
$95	+$200	+$80	+$500
$97	$0	−$120	+$300
$100	−$300	−$420	$0
$105	−$300	−$420	−$500
$130	−$300	−$420	−$3,000

Read the table by zone rather than by row.

• Stock above $100. The spread loses least among the option choices: $300 versus $420. The short sale loses without limit as the stock rises. At $130 it is down $3,000, ten times the spread's worst case.
• Stock between $90 and $100. The spread beats the long put at every price, always by exactly $120, because you paid $1.20 less and neither the short $90 put nor any cap is in play yet. The spread also breaks even earlier: at $97 rather than $95.80.
• Stock below about $88.80. The long put overtakes the spread. Below $90 the spread is stuck at $700, while the long put keeps gaining a dollar for every dollar of decline. The two are equal where $95.80 − S = $7.00, which is S = $88.80.

The short sale has the largest gains in a collapse, but it is a different category of risk. Shorting requires a margin account, borrowing the shares, paying any borrowing fee and paying any dividends to the lender. Its loss is unlimited in theory. If a heavily shorted stock starts rising quickly, the forced buying can feed itself; we covered how that loop works in our guide to short squeezes. The bear put spread cannot be squeezed this way. Your worst case is known when you enter.

The practical rule is simple. Choose the spread when you expect a moderate decline to roughly the lower strike. Choose the long put when you expect a large decline and are willing to pay more for unlimited downside participation. Avoid the short sale unless you understand and can absorb its open-ended risk.

How the spread behaves before expiration

The expiration table describes the end state. Before expiration, the spread's value depends on time remaining and implied volatility as well as the stock price. Three behaviours are worth understanding.

Delta: a muted reaction to the stock

A long put has negative delta: it gains when the stock falls. The short lower put has positive delta for you, because you are short a negative-delta option. The two partly cancel, so the spread's net delta is smaller than the long put's. In practice, early in the trade a $1 drop in XYZ moves the spread's value by noticeably less than $1, and much less than a $1 drop moves the long put. That is the cost of a cheaper entry: you have less exposure to the move, as well as less money at risk.

As expiration approaches, the spread's value converges toward the intrinsic values shown in the table. The sloped zone between $90 and $100 sharpens: by expiration day, a one-dollar move inside that range is worth almost the full $100 per spread.

Theta: time hurts, but less

The OIC notes that "the passage of time hurts the position, though not quite as much as it does a plain long put position." The reason is that the short put decays too, and that decay works in your favour. The net effect depends on where the stock is. When XYZ sits near $100, the long put has most of the time value and the spread loses value as days pass. When XYZ has already fallen near or below $90, the short put carries significant time value, and the passage of time can actually help, because the spread drifts toward its $10 maximum.

Vega: implied volatility matters less

The OIC rates the volatility impact as "slight, all other things being equal." A rise in implied volatility lifts both puts; a fall lowers both. Because you are long one and short the other, much of the effect cancels. This is one of the main reasons traders use spreads rather than outright puts around events. After an earnings report, implied volatility often drops sharply, and a long put can lose value even if the stock falls a little. The spread is less exposed to that drop. It is not immune, so if you are positioning ahead of an event, compare the spread's price with the long put's and expect both to reprice afterwards.

Managing the trade: when to take profits or cut losses

You do not have to hold to expiration. Most spreads are closed early by selling the long put and buying back the short put as one order. Here is a hypothetical path for our trade to show why early exits are common.

Twenty-four days into the trade, with 21 days left, XYZ has fallen to $92. Because time value remains in both options, the spread is not yet worth its intrinsic $8. Assume it trades at a hypothetical $5.50. Closing now locks in ($5.50 − $3.00) × 100 = $250 per spread. Holding to expiration could add up to another $450 if XYZ stays below $90, but it could also give back the gain if XYZ bounces above $97.

A common framework is to set targets as a percentage of the maximum gain:

• Profit target. Many traders close when the spread has captured 50% to 75% of the maximum profit. In our example, that is a spread value between $6.50 and $8.25, or $350 to $525 of profit. The final portion of the gain often requires the stock to stay put for weeks, which is a weak trade-off.
• Loss limit. Because the maximum loss is already defined, some traders simply let a failed spread expire. Others close if the spread loses half its value, to save some premium for the next trade. Either can be reasonable; what matters is deciding before you enter.
• Time stop. If most of the time has passed and the stock has not moved, the spread's remaining value tends to decay quickly. Setting a date to reassess avoids drifting into expiration without a plan.

None of these thresholds is a rule from an exchange or regulator. They are trade-management conventions. Back-test or paper-trade them for your own use before treating any of them as reliable.

Early assignment and expiration risk

American-style equity options can be exercised by the holder at any time before expiration. That means your short $90 put can be assigned early. The OIC notes that early assignment, "while possible at any time, generally occurs only when a put option goes deep into-the-money." FINRA's explainer on assignment adds that assignment is random among holders of short positions, so you cannot control whether you are chosen.

Suppose XYZ falls to $82 and your short $90 put is assigned. You must buy 100 shares at $90, for $9,000. You still hold the long $100 put, which gives you the right to sell 100 shares at $100. Combining the two:

Step	Cash flow
Assigned on short $90 put: buy 100 shares	−$9,000
Exercise long $100 put: sell those 100 shares	+$10,000
Original net debit	−$300
Net result	+$700

That is the same $700 maximum gain shown in the payoff table. The protection still works, but there are two practical points:

• Cash or margin for the shares. For a moment you are obliged to pay $9,000 for stock. If your account cannot cover that, your broker may act for you, sometimes at an inconvenient time. Know your broker's policy.
• Exercise rather than sell. Exercising the long put throws away any time value left in it. If the long put still trades above its intrinsic value, it can be better to sell it and sell the assigned shares separately. Compare the two before acting.

The expiration-day trap

The most awkward outcome is XYZ closing very near $90 on expiration day. Your long $100 put is clearly in the money and will normally be exercised automatically. Your short $90 put is near the money, and you will not know until after the close whether it will be assigned. If it is not assigned, the exercise of your long put leaves you short 100 shares over the weekend. If it is assigned and your long put exercises, the two offset. Prices can move after the close, and that uncertainty can turn a full-profit trade into a smaller one, or a loss.

The simplest way to avoid this is to close the spread before the final day when the stock is near your short strike. The cost is a commission and a bid-ask spread. The benefit is knowing your position on Monday morning.

How to choose strikes and expiration

There is no best strike pair, only better and worse fits for a specific view. Start from your target, not from the option chain.

Put the short strike near your target

If you think XYZ can reach $90, a $90 short strike collects the full width at that price. Setting the short strike far below your target, at $80 for example, costs more and pays only if you were too conservative. Setting it far above your target, at $95, gives up profit you expected to earn.

Compare widths using the same yardstick

Here is how the structure changes with three hypothetical widths, all with the long put at $100. The debits are illustrative; the formulas are exact.

Spread	Debit	Max loss	Max gain	Break-even	Debit / width	Reward : risk
100/95	$1.90	$190	$310	$98.10	38%	1.63 : 1
100/90	$3.00	$300	$700	$97.00	30%	2.33 : 1
100/80	$3.80	$380	$1,620	$96.20	19%	4.26 : 1

The wider spread looks more attractive by reward-to-risk, but it needs a 20% decline to pay in full. The narrower spread breaks even closer to the current price, but its reward is small. The higher reward-to-risk ratio on wide spreads is not free; it reflects that a large move is less likely. Choose the width that matches the size of move you actually expect, not the most impressive ratio.

Choose an expiration that fits the catalyst

If your thesis depends on an event, such as an earnings report on a known date, choose an expiration after it, with a margin for the market to react. If your thesis is a gradual trend, give it more time; spreads with more time cost more, but they also give you more chances to close for a profit. Very short-dated spreads are cheap but leave little room for being early, and timing a decline is often harder than identifying one.

Check liquidity

Look at the bid-ask spread on both legs and the open interest. Wide quotes can make a spread cost meaningfully more than its theoretical value to enter and exit. A 10-cent gap on each leg can cost $20 per round trip per spread, which on a $300 risk is a real drag.

Costs, margin and taxes

Commissions and fees

A spread has two legs, so it generates two option commissions on entry and two on exit. At a hypothetical $0.65 per contract, one spread costs $1.30 to open and another $1.30 to close, or $2.60 round trip. Including those costs, the maximum loss becomes $302.60 and the maximum gain $697.40. Spreads that expire worthless may avoid the closing commission. Check your broker's schedule; costs vary by firm and by account.

Margin requirements

Because a debit spread's risk is defined, it typically requires only that you pay the net debit. Cboe's margin manual notes that long options must be paid for in full and allows the proceeds from short option sales to offset that cost when the position qualifies as a spread. Brokers can impose stricter house requirements, and options trading requires approval for an appropriate trading level. FINRA Rule 2360 governs how member firms approve and supervise options accounts, including the requirement that customers receive the options disclosure document.

Taxes

In the United States, IRS Publication 550 explains how gains and losses on options are generally treated as capital gains and losses, with holding-period rules determining whether they are short or long term. Spreads can be affected by special rules, such as the straddle rules, when they offset other positions you hold in the same stock. Assignment and exercise can also change how cost basis is calculated. Tax treatment depends on your full situation; speak to a qualified tax professional rather than relying on a general guide.

Position sizing: risk the debit you can afford to lose

Because the maximum loss is known in advance, position sizing is straightforward. Decide how much of your account you are willing to lose on one idea, then divide by the spread's risk.

Suppose your account is $50,000 and your rule is to risk no more than 1% on a single trade. That is $500. Each 100/90 spread risks $300, or $302.60 including round-trip commissions, so you would trade one spread. A 2% limit, $1,000, would allow three spreads ($907.80 including commissions). Five spreads would risk $1,500 before costs, or 3% of the account.

The temptation with cheap spreads is to buy many of them. Defined risk per spread does not mean low total risk; ten spreads that all fail cost ten times as much. Treat each position as a percentage of your account and stick to it. If your goal is protecting shares you already own rather than betting on a decline, our protective put guide walks through that approach.

Bear put spread vs bear call spread

The other common way to express a moderately bearish view with defined risk is the bear call spread: you sell a lower-strike call and buy a higher-strike call, collecting a net credit. It is a credit spread rather than a debit spread.

Feature	Bear put spread	Bear call spread
Cash at entry	Pay a debit	Receive a credit
Needs the stock to	Fall below the break-even	Stay below the break-even
Best case	Stock below the lower strike	Stock below the lower strike
Time decay	Usually works against you near the money	Usually works for you
Typical use	You expect an actual decline	You expect the stock not to rise

The choice comes down to whether you need the stock to move. A bear put spread rewards a decline. A bear call spread rewards the absence of a rally. If you expect the stock to go nowhere, a neutral structure like an iron condor or a butterfly spread may fit better. If you expect a big move but are not sure of its direction, the strangle is the relevant tool.

Using a bear put spread as a hedge

A bear put spread is usually discussed as a directional bet, but it can also be a cheaper hedge. If you own 100 shares of XYZ at $100, a $100/$90 put spread protects you dollar for dollar between $100 and $90 for $300 rather than the $420 a plain put would cost.

The weakness is that the protection ends at $90. Below that, you are unhedged again. If XYZ fell to $70, your shares would lose $3,000 while the spread paid $1,000, for a net position loss of $2,300 after its cost. A plain put would have limited the loss to $420 in premium. A put spread is a partial hedge for a moderate decline, not insurance against a crash. If what you fear is a collapse, a protective put is the more appropriate structure.

Common mistakes

• Legging in. Entering the two legs separately exposes you to price moves between fills. Use a single spread order.
• Paying too much of the width. If the debit is 70% or more of the strike width, your reward is small relative to risk. Look for a better strike pair or a different structure.
• Ignoring the calendar. A correct view that arrives after expiration is a losing trade. Match the expiration to your thesis.
• Holding through expiration near the short strike. This is the scenario where you may be unexpectedly short stock. Close the spread first.
• Forgetting dividends. When a stock goes ex-dividend, its price usually falls by roughly the dividend amount. That expected drop is generally reflected in put prices already. It is not a free gain, and it can make early assignment of deep in-the-money short puts less likely, but not impossible.
• Oversizing because the risk is defined. Defined risk per spread is not the same as low risk for the account.

The bottom line

A bear put spread turns a bearish opinion into a trade with a known price, a known worst case and a known best case. In our hypothetical XYZ example, $300 buys up to $700 if the stock falls from $100 to $90, breaks even at $97, and loses no more than $300 however high the stock goes. It beats an outright put across most moderate declines and loses less when you are wrong. It gives up the large gains of a crash, and it requires you to think about time, assignment and liquidity.

Used with a clear target and sensible sizing, it is one of the most practical defined-risk tools in options trading. If you want to practise the mechanics, start with small positions or a paper account. When you are ready to trade, you can open an account with our partner broker. Options involve risk and are not suitable for all investors. Read the options disclosure document before trading.