0DTE Strategy Guide: Put Debit Spread
The put debit spread is the bearish counterpart to the call debit spread. Learn how to structure defined-risk downside bets in 0DTE options.
The put debit spread (bear put spread) is a two-leg bearish strategy with defined risk. You buy a higher-strike put and sell a lower-strike put, paying a net debit. It is the bearish equivalent of the call debit spread.
Basic Structure
- Legs: Buy 1 put at a higher strike + Sell 1 put at a lower strike (same expiration)
- Risk type: Defined risk — maximum loss is the net debit paid
- Directional bias: Moderately bearish
- Cost: Net debit
How It Works
SPY is at $580. You buy the $580 put for $1.40 and sell the $578 put for $0.55. Net cost: $0.85. Maximum profit: $2.00 - $0.85 = $1.15 (135% return). Maximum loss: $0.85.
SPY needs to fall below $578 for full profit. Between $578 and $580, you receive partial profit. Above $580, both puts expire worthless.
Best Market Conditions
- Moderate bearish moves: Works well on down-trending or gap-down days
- Elevated IV: The sold put offsets the inflated premium on the bought put
- Post-rally exhaustion: When a multi-day rally looks overextended
Greeks Exposure
| Greek | Exposure | What It Means |
|---|---|---|
| Delta | Net negative (-) | Profits from downward moves |
| Gamma | Reduced (partially offset) | Less volatile than a naked put |
| Theta | Situation-dependent | Mixed — depends on moneyness of both legs |
| Vega | Reduced (partially offset) | Less IV sensitivity than a single put |
Why Traders Use It in 0DTE
Puts can be expensive on expiration day, especially when VIX is elevated. The sold put reduces your cost basis, making bearish trades more affordable. The defined risk lets you size positions with confidence.
Primary Risk Factors
- Capped profit: Even on a large selloff, your gain is limited to the spread width minus cost
- Need quick moves: In 0DTE, you need the move to happen fast enough to overcome theta
- Two-leg execution: Use limit orders on the net debit to avoid poor fills
- Bounce risk: Selloffs in 0DTE can reverse violently. Don't enter during capitulation without a plan
Exit Management for 0DTE
- Close at 70–80% of max profit — the risk of a bounce isn't worth the remaining edge
- If SPY bounces $1 above your long put strike, the thesis may be broken. Cut the position
- Close by 2:30 PM if the trade hasn't matured to avoid rapid theta in the final hour
Safety Rating
Defined risk — generally safer. Like the call debit spread, this is suitable for 0DTE beginners who want bearish exposure with a known maximum loss.
This content is for educational purposes only and does not constitute financial advice. Options trading involves substantial risk of loss.