0DTE Options Strategy: The Complete 2025 Guide — What Works, What Doesn't

Zero days to expiration options — 0DTE — are the fastest-growing segment of the options market. In 2023, 0DTE SPX options accounted for roughly 45% of all SPX volume. By 2024 that figure exceeded 50%. Every major brokerage now offers 0DTE options, and every retail trader seems to be trading them.

Most of them are trading them wrong.

This guide covers the mechanics of 0DTE options, why most retail approaches fail, and the systematic credit spread methodology that has produced an 88%+ win rate over 364 live trades.

What Makes 0DTE Options Different

Options have several components of value: intrinsic value (how much they're in the money) and time value (theta). On a regular options contract, theta decays gradually over weeks or months. On a 0DTE option, theta decay is exponential — the entire remaining time value evaporates in a single trading day.

This is the key fact that drives 0DTE strategy:

• If you are a seller of 0DTE premium, you benefit from this rapid decay
• If you are a buyer of 0DTE options, you are fighting maximum theta decay every minute

Why Most Retail 0DTE Traders Lose

The most common 0DTE retail approach is buying calls or puts, often short-dated with high leverage, hoping for a big directional move. This approach has fundamental structural problems:

1. You are fighting theta — Every minute that passes, your option loses value even if the underlying doesn't move
2. You need to be right on direction AND timing — Not just "SPX goes up today" but "SPX goes up fast enough, right now"
3. Bid-ask spread is a large % of premium — A $1.00 option with a $0.10 spread means you're starting 10% in the hole
4. IV crush after moves — Even if SPX moves in your direction, implied volatility often drops, hurting your long option

The institutional traders who dominate 0DTE volume are primarily selling premium, not buying it. They are the house. Retail buyers are the gamblers.

The Credit Spread Solution

A 0DTE bull put credit spread captures the theta decay advantage while providing defined, capped risk — addressing the core problem with naked premium selling (which can have theoretically unlimited losses).

Here's how the economics work on a typical trade:

SPX must fall more than 2.9% in a single day for this trade to lose at expiration. In our 3-year track record, that has happened fewer than 10% of the time — and our stop loss at 2x credit limits damage even when it does.

The 0DTE Trading Calendar

SPX has options expiring on Monday, Wednesday, and Friday every week. Each day has different characteristics:

• Monday — Weekend gap risk is priced in (slightly higher IV). Good premium opportunity if no macro events.
• Wednesday — Mid-week. Often lower vol unless economic data releases.
• Friday — End of week. Highest liquidity day. IV sometimes spikes into the close. Excellent for credit collection.

We avoid trading on FOMC meeting days, major CPI/PPI release days, and any day with pre-market futures moves greater than 1.5% in either direction.

Scaling the Strategy

The beauty of this approach is that it scales linearly with account size. A $25,000 account trading 2 contracts per signal generates very different absolute returns than a $500,000 account trading 50 contracts — but the win rate, the methodology, and the risk-per-trade percentage are identical.

Projections based on 3 trades/week, 88% win rate, 50% profit target, 2x stop loss. Past results do not guarantee future performance.

Risk Management Is Everything

The single biggest mistake traders make with 0DTE credit spreads is inconsistent risk management. The strategy works because of the law of large numbers across many trades. Skipping one stop loss can erase weeks of gains.

Our rules are mechanical and non-negotiable:

• Never skip the stop loss — even if you "feel" SPX will recover
• Never trade during extreme VIX spikes (above 35)
• Never size more than 3% of account per trade
• Never hold through expiration — close by 3:30 PM ET at the latest