0DTE Strategy Guide: Put Credit Spread
The put credit spread collects premium on a bullish bias. Learn how this defined-risk selling strategy works in 0DTE and why theta is your ally.
The put credit spread (bull put spread) is the bullish cousin of the call credit spread. You sell a put and buy a lower-strike put for protection, collecting premium upfront. You profit if the underlying stays above your sold strike.
Basic Structure
- Legs: Sell 1 put at a higher strike + Buy 1 put at a lower strike (same expiration)
- Risk type: Defined risk — max loss is spread width minus credit
- Directional bias: Bullish to neutral
- Income: Net credit received upfront
How It Works
SPY is at $580. You sell the $578 put for $0.55 and buy the $576 put for $0.20. Net credit: $0.35. Maximum loss: $2.00 - $0.35 = $1.65. If SPY stays above $578, both puts expire worthless and you keep the $0.35.
Best Market Conditions
- Mildly bullish or range-bound days: The underlying needs to hold above your sold strike
- Post-selloff stabilization: After a down move when you expect support to hold
- Elevated IV: You collect more premium when volatility is high
Greeks Exposure
| Greek | Exposure | What It Means |
|---|---|---|
| Delta | Net positive (+) | Benefits from the underlying holding or rising |
| Gamma | Negative (-) | Large downward moves accelerate losses |
| Theta | Positive (+) | Time decay is your ally |
| Vega | Negative (-) | Dropping IV benefits the position |
Why Traders Use It in 0DTE
Put credit spreads exploit maximum theta decay on expiration day. If you correctly identify a support level and sell puts below it, the rapid time decay does the work for you. The defined risk makes the strategy approachable for less experienced traders.
Primary Risk Factors
- Sharp selloffs: A sudden drop through your strikes produces maximum loss quickly
- Risk-reward ratio: Similar to call credit spreads, you typically risk more than you stand to gain
- False support: Technical support levels can break, especially on high-volume days
- Afternoon volatility: The 3:00–4:00 PM window can produce unexpected moves that challenge positions
Exit Management for 0DTE
- Close at 50–70% of max profit to remove remaining risk
- If SPY breaks below your sold strike, close immediately — hoping for a bounce while gamma works against you is high-risk
- Set your maximum acceptable loss before entering (e.g., close if the spread doubles in value against you)
Safety Rating
Defined risk — moderate. Risk is capped, but the asymmetric risk-reward requires discipline and proper position sizing.
This content is for educational purposes only and does not constitute financial advice. Options trading involves substantial risk of loss.