Bear Put Spread

Cheaper defined-risk bearish bet. Outlook: bearish. Direction: debit. Risk: defined.

A bear put spread (debit put spread) is the bearish mirror of the bull call spread. Buy a closer-to-money put and sell a further-OTM put. The short leg reduces cost but caps how far the position can profit on the downside.

Like its bullish counterpart, this is a cheaper directional bet: lower debit, lower breakeven improvement requirement, lower max profit. Good risk/reward when you expect a modest down-move.

Worked example: a stock trades at $100. Open a 30-day 100/90 bear put spread: long the $100 put at $3, short the $90 put at $0.80, net debit $2.20 per share ($220 per contract). Break-even at expiration is $97.80; max profit is the $10 width minus $2.20 debit = $780 per contract, achieved at $90 or below; max loss is the $220 debit at $100 or above. If the stock closes at $93, the long put is worth $7 and the short put is worth zero, so the spread is worth $7 minus the $2.20 debit = $480 profit. The structural put-skew premium typically makes bear put spreads slightly more expensive per dollar of notional than equivalent bull call spreads, but the asymmetric risk-reward remains attractive when the bearish thesis is moderate-magnitude.

Sizing and timing: bear put spreads are most often opened in the 30-60 DTE window, where the long-leg theta is meaningful but not dominating. Match the spread width to your expected move size: if you anticipate a 10% drop on a $100 stock, a 100/90 width captures the move efficiently; tighter widths (100/95) cost less but require precise timing on the down-move; wider widths (100/85) cost more debit and require a larger drop to fully pay off. The typical retail bear put spread also benefits from being entered after a counter-trend rally rather than chasing a falling stock; entering on a bounce captures cheaper put prices because the IV and the long-put intrinsic value are both lower at entry.

Break-Even

Break-even = long-strike - net debit paid.

Max Profit

(Spread width - net debit) x 100 x contracts, achieved if spot is at or below the short strike at expiration.

Max Loss

Net debit x 100 x contracts, realized if spot is at or above the long strike at expiration.

Risk Profile

P/L curve is flat at -debit above the long strike, kinked at the long strike, sloping up linearly toward the short strike, then flat at max profit below the short strike. Asymmetric in the bear direction: max profit > max loss only when the debit is less than half the spread width.

Greeks by Leg

Two-leg structure. Long higher-strike put contributes negative delta (-0.50 to -0.70), positive gamma, negative theta, positive vega. Short lower-strike put contributes positive delta (+0.20 to +0.30), negative gamma, positive theta, negative vega. Net: negative but capped delta, reduced gamma vs a naked long put, partially offset theta drag, and reduced vega exposure. Like the bull call spread, this is a structurally less vol-sensitive way to express the directional view.

When to Use

• You expect a moderate decline, not a crash.
• IV is elevated, so selling the lower strike recovers some expensive premium.
• You want defined-risk bearish exposure without the open-ended profit of a naked long put.
• You are bearish but want a structure cheaper than an outright long put.

IV-Rank Guidance: When to Enter

Bear put spreads benefit from being entered when put-side IV is rich (typically reflects market fear). The persistent equity put skew means the long-leg IV is usually higher than the short-leg IV; in elevated IV-rank environments, this skew widens and the short-leg credit is more meaningful. Best entry zone: IV rank 40-70 with a building bearish catalyst. Buying bear put spreads into very low IV usually means the spread is cheap but the realized move needed to profit is also unlikely under that calm regime.

Common Pitfalls

• Capped profit: if the stock drops past the short strike, you stop participating in the downside.
• Put skew means this structure is often more expensive per $ of notional than a call spread for a symmetric move.
• Time decay works against the net-long position.
• Early assignment on the short put is rare but possible, more so for deep ITM with high intrinsic value.

Adjustments and Roll Logic

• If the underlying drops sharply through the short strike with time remaining, consider rolling the short leg down and out: buy back the short put, sell a lower-strike put at the same or later expiration. Captures additional downside while keeping the spread structure.
• If the trade is profitable at 50-70% of max profit, close early; the remaining theta benefit is small relative to the time-and-gamma risk on the short leg.
• If the underlying rallies and the spread is approaching max loss with weeks remaining, consider closing rather than holding; the residual extrinsic value is worth more than the diminishing chance of recovery.
• If close to expiration with the underlying between strikes, manage pin risk by closing rather than letting the short leg get assigned at uncertain timing.

Frequently Asked Questions

Is a bear put spread better than just shorting the stock?

For most retail purposes, yes. Bear put spreads have defined risk, no borrow fees, no margin calls, and a clear time horizon. Shorting stock has unlimited theoretical risk and is path-dependent (can be margined-out on a temporary spike). Bear put spreads fit the typical retail bearish thesis better; shorting is more appropriate for institutional sustained bearish positions.

Why is a bear put spread sometimes more expensive than a bull call spread?

Equity put-skew: OTM puts trade at higher IV than equivalent-delta OTM calls because of persistent crash-protection demand. This means a bear put spread captures less of its notional in the short-leg credit relative to a bull call spread of the same width. The structural skew is built into the pricing.

How do I size the spread width?

Match the spread width to your expected move target. If you think the stock will drop 10% to $90 from $100, a 95/85 bear put spread captures the move efficiently. Wider spreads cover larger drops but cost more debit; narrower spreads are cheaper but require very precise timing. The balance depends on conviction about magnitude.

What happens at expiration if both strikes are ITM?

Both legs auto-exercise (assuming they are at least $0.01 ITM). The long put assignment gives you the right to sell shares at the strike; the short put assignment forces you to buy shares at the strike. Net result: you receive the spread width minus the original debit. Most brokers handle this automatically; some require manual instructions. Closing the spread before expiration avoids the cash-settlement complications.

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