The bear put spread (a "long vertical put" or "debit put spread") is the bearish mirror of the bull call spread, and the disciplined way to express downside. You trade away the deep-tail payoff of a naked put for a 30-50% cheaper entry — which matters most in exactly the moment you want to be short, when fear has already bid implied vol.
The structure
Buy one put at strike A (typically slightly OTM, near spot)
Sell one put at lower strike B (further OTM), same expiration
You pay net debit. Max loss = debit. Max profit = (A − B) − debit. Profitable if the underlying expires below your breakeven (A − debit).
When to use it instead of a long put
The decision rule mirrors the bullish case:
IV rank < 30 → long put. Vol is cheap; pay for the full downside.
IV rank 30-50 → either works. If your target sits right at the short strike, the spread is the more capital-efficient expression.
IV rank > 50 → bear put spread. Selling the lower put recovers a meaningful slice of the inflated premium you'd otherwise overpay on a naked long — the edge a panic-bid vol surface hands you.
Strike selection by delta
Long leg: 0.40-0.45 delta — close to ATM for responsive downside without paying for dead deep-ITM premium.
Short leg: 0.20-0.25 delta — far enough below that you keep most of the move before your profit caps out.
OptionsDeck's contract picker selects these automatically when the AI Strategist proposes a bear put spread — it scans the live chain and snaps to the listed contracts with the tightest spread and highest open interest at the target deltas.
Reading the regime first
Before opening any bearish vertical, check three things on OptionsDeck:
Spot vs gamma flip — bearish trades have a higher hit rate when spot is below the flip, where dealer hedging amplifies moves rather than damping them.
Recent unusual flow — buyer-initiated put sweeps and ask-lifted downside bets confirm direction.
Distance to nearest put wall — your target should sit at or above that wall, not below it; the wall is dealer-defended support that can stall the move.
Trade the template
Open the Strategy Builder with the Bear Put Spread pre-loaded — strikes auto-set from ATM, P/L and breakeven render instantly. Or ask the AI Strategist for a bearish trade on your ticker — it'll often propose a bear put spread when IV is elevated and spot is working below the gamma flip.
Frequently asked questions
Bear put spread vs long put — which is better?
Long put: full downside exposure, but expensive when IV is elevated (and IV is usually bid in a selloff). Bear put spread: capped downside profit, but ~30-50% cheaper. In IV rank below 30 → favor the long put. Above 50 → favor the spread, because the short leg you sell recovers part of the inflated premium.
What strikes to pick?
Long leg ~0.40-0.45 delta (slightly OTM put, close to ATM). Short leg ~0.20-0.25 delta further OTM. Width tracks conviction — narrower is cheaper with a smaller reward; wider costs more but pays more if price falls through both strikes.
When do I take profit?
When the spread reaches 70-80% of its max value. Don't hold for full convergence to width — near expiration, gamma risk can whip a winning bearish spread back to a loss on a single relief bounce.
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