Bear Put Spread

A bear put spread buys a put at a higher strike and sells a put at a lower strike, same expiration. You pay net debit. It profits when the stock falls toward or below the lower strike. Max loss is the debit; max profit is width minus debit.

It is the bearish mirror of the bull call spread: cheaper than a long put alone, but profit is capped. Put spreads can be sensitive to skew: OTM puts often carry higher IV than ATM, which affects net debit versus what a quick mid-price estimate suggests.

Liquidity and execution

Put spreads on indices and large ETFs fill cleanly. On smaller stocks, verify the lower long put has a real market before you sell the higher strike. Use spread orders to avoid being long the higher put without the hedge.

Structure

Leg	Action	Role
Higher strike (K2)	Buy put	Bearish delta, pays premium
Lower strike (K1)	Sell put	Reduces cost, caps gain

• Entry: Net debit.
• Max loss: Debit × 100.
• Max profit: (K2 − K1 − debit) × 100 at or below K1.
• Breakeven at expiry: K2 − debit.

Buy $105 put for $6, sell $95 put for $2, debit $4, width $10: max profit $6 ($600), max loss $400, breakeven $101.

Worked example

Stock at $100.

1. Buy the $105 put for $6.00.
2. Sell the $95 put for $2.00.
3. Net debit = $4.00 ($400 per contract).

At expiry at $90, spread worth $10 intrinsic ($1,000), profit ≈ $600. At $100, spread may be worthless or small value; you lose most or all of the $400 debit.

Payoff at expiration

Stock at expiry	P/L per contract (approx.)
$110	−$400 (max loss)
$101	~$0 (breakeven)
$95	+$600 (max profit)
$80	+$600 (max profit, flat below K1)

Greeks for this position

Net delta is negative (bearish). Smaller magnitude than a single long put because the short lower put adds positive delta.

• Gamma: Positive in the middle zone, less extreme than a lone long put.
• Theta: Negative (net long puts). Time hurts if the drop is slow.
• Vega: Positive. Rising IV can help before expiry; falling IV hurts.

Delta explained walks through how put deltas combine.

When traders consider it

View	Bear put spread vs alternatives
Moderate drop expected	Spread vs long put: lower cost, capped gain
Crash / deep drop	Long put may pay more below the short strike
Neutral to bearish with credit	Bear call spread collects premium instead

Risks and management

• Assignment: Short put may be assigned if ITM. Usually less concern than short calls into dividends, but manage stock delivery if assigned.
• Early close: Spread value can be most of max profit before expiry; traders often take profits early.
• IV crush: If you bought before an event and IV collapses, you can lose on vega even if the stock moves your way slowly.

Order entry

Debit put spreads should be opened as a unit. Pay attention to put skew: lower strikes often have different IV than higher strikes, which changes net debit versus a naive mid-price estimate.

Sizing

Max risk is the debit. A $400 debit per contract is the cap. Bear put spreads cost less than long puts but give up profit below the long strike. Size for the moderate drop you actually expect.

Common mistakes

• Using a spread when you want crash protection (long put may be better).
• Picking wings so narrow that fees dominate.
• Holding through a reversal after a fast drop (give back open profit).
• Forgetting short put assignment risk if the stock rips back up through the lower strike.

Closing vs holding to expiration

Bear put spreads are often closed once most of max profit appears, because the last few dollars of gain compete with gamma risk near the short strike. Holding through a rebound can turn a winning trade into a scratch or loss even if the stock remains below your original entry spot. If you plan to hold to expiry, know whether your broker auto-exercises long ITM legs and whether you want stock exposure from assignment on the short put.

Mark-to-market before expiration

A fast drop can show open profit well before expiry as the spread widens toward max value. A bounce back toward the upper strikes gives back profit even if you were "right" once. Theta works against you as a debit holder if the move stalls mid-range.

If IV collapses after a sharp down move, vega can claw back gains on both puts. Combine directional view with vol view when holding through events.

Tax and reporting (high level)

Closing the spread for a gain or loss is usually simpler than assignment paths. Keep trade confirmations. Not tax advice.

Practice without capital

Use ThetaViz to replay spot moves against your modeled bear put spread before risking cash. Note how open P/L can peak before expiry, then fade on a bounce. Saving the strategy lets you compare marks to your plan: Saved strategies and P/L. Cross-check net Greeks in Greeks in the builder.

Related guides

Start from long put if you need uncapped downside profit, then compare debit width here. For credit bearish exposure, see bear call spread. Read delta explained while watching net delta in the builder.

Reading the payoff chart

The bear put spread payoff should show flat max loss below the long put, a ramp between strikes, and flat max profit below the short put. If your chart does not match, check that strikes and debit are entered correctly. See Reading payoff charts for axis and breakeven conventions used across ThetaViz.

Try in ThetaViz

Open bear put spread builder to plot breakevens and compare debit with a standalone long put.

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ThetaViz provides educational tools only. This guide is not investment, tax, or legal advice. Prices, margin requirements, and tax rules change. Confirm details with your broker and qualified professionals before trading.