Options Education
Bear Put Spread
A moderately bearish strategy. Buy a put and sell another put with a lower strike. This reduces cost and risk, but caps profit. Ideal for moderate price decreases.
Risk / Reward
Defined Risk, Defined Profit
Volatility View
Less sensitive to IV changes
Time Decay View
Less sensitive to time decay
A bear put spread (or put debit spread) is a defined-risk bearish options strategy constructed by purchasing an in-the-money or at-the-money put option while simultaneously selling an out-of-the-money put at a lower strike price with the same expiration date.
Selling the lower strike put finances a substantial portion (typically 40–70%) of the long put's premium, lowering your cash outlay and breakeven price. In exchange, maximum profit is reached if the stock falls to or below the short strike at expiration. It delivers cost-effective downside participation.
Greeks Profile
Delta
Negative — profits from falling prices; muted compared to outright long puts.
Gamma
Positive near the long strike, flipping negative near the short strike as max gain is reached.
Theta
Mildly negative — short put theta offsets the long put daily decay rate.
Vega
Mildly positive — insulated from volatility crush compared to single-leg puts.
Bear Put Spread vs. Single Long Put
Bear Put Spread (Debit Spread)
- Cost: 40-70% cheaper than buying a put alone.
- Breakeven: closer to spot price (Long Strike minus Net Debit).
- Theta decay: reduced — short put decay counteracts long put decay.
- Profit cap: capped at Strike Width minus Net Debit.
Single-Leg Long Put
- Cost: full put premium paid upfront.
- Breakeven: lower hurdle required to overcome high put skew.
- Theta decay: fully exposed to rapid daily extrinsic erosion.
- Profit cap: profits expand all the way down to $0.
The Playbook
The risk profile, then how to trade and manage it.
Risk Profile (Payoff Diagram)
How to Read
Legs are pre-filled with a real long put (near the money) and short put (further OTM) from the current SPX chain. Change the expiration or either strike to see the payoff update live. Maximum profit occurs at or below the short put strike; maximum loss is the net debit paid, occurring at or above the long put strike.
How to Trade It
Strike Selection
- Long Put (Higher Strike): buy an ATM or slightly ITM strike (50–60 delta) for high delta sensitivity.
- Short Put (Lower Strike): sell an OTM strike (20–30 delta) placed at your anticipated downside price target.
- Debit Budget: target a net debit between 30% and 50% of the strike width to ensure an attractive risk/reward profile.
Time to Expiration
- 30–60 DTE: optimal window providing sufficient duration for the bearish thesis to play out with balanced decay.
Step-by-Step Execution
- Identify a stock with deteriorating fundamentals or a technical breakdown below key support.
- Select an expiration cycle 30–60 days out.
- Buy the ~50-delta upper put and simultaneously sell the ~25-delta lower put as a single spread order.
- Confirm that net debit is $\le 50\%$ of strike width.
- Submit a GTC limit order to close at 50–75% of maximum profit.
Manage the Position
Profit Taking
- 50–75% Rule: take profits once the spread captures 50–75% of maximum potential gain.
- Fast Drop Exit: if the stock plunges through the short strike early in the trade, take profits immediately.
Loss Management & Exits
- 50% Debit Stop: close the spread if its market price declines by 50% from entry.
- Time Stop (14–21 DTE): exit if the stock has not moved downwards by 21 DTE to recover remaining extrinsic value.
Spread Payoff & Breakeven
Worked Example ($5-Wide Spread)
Breakeven is $97.75 ($100 - $2.25). Max risk is strictly limited to the $225 net debit paid.
Risks & Common Mistakes
Position Sizing
- Allocate no more than 2–3% of portfolio equity to any single vertical debit spread.
Common Mistakes
- Overpaying for debit: paying >50% of the strike width, which degrades the risk-to-reward ratio.
- Holding past target: letting profitable spreads ride into expiration week where delta pin risk increases.
- Trading illiquid names: entering spreads on low-volume strikes with wide bid-ask slippage.
Risk Disclosure: Bear put spreads carry the risk of total loss of the net debit paid. This information is for educational purposes only and does not constitute investment advice.