0DTE (Zero Days to Expiration)
Options that expire on the same day they are traded — the fastest-growing segment of the options market with unique risk/reward characteristics.
0DTE (zero days to expiration) refers to options contracts that expire on the day they are traded. For SPX, 0DTE options are available every trading day (Monday through Friday) thanks to the 2022 expansion of daily expirations.
0DTE has become the dominant force in SPX options:
- ●0DTE now accounts for 40-50% of all SPX options volume
- ●Notional value traded daily exceeds $1 trillion
- ●Retail and institutional traders use 0DTE for directional bets, hedging, and income
Why 0DTE is different from standard options:
- ●Extreme theta decay — options lose value by the minute, not the day
- ●Maximum gamma — small price moves create large P/L swings
- ●No overnight risk — positions settle at 4:00 PM, no gap risk
- ●Lower capital requirements — debit spreads can be entered for a few hundred dollars
The risks:
- ●0DTE options can go from profitable to worthless in minutes
- ●Selling naked or undefined-risk 0DTE positions can produce catastrophic losses
- ●Slippage during fast markets can widen spreads dramatically
SPXXL was built specifically for 0DTE. Every classification, structure recommendation, and risk signal is calibrated for the unique dynamics of same-day expiration. The engine's pre-market classification tells you what type of session to expect, and the real-time tools help you manage positions through the accelerating theta curve.
Related Terms
The rate at which an option loses value as time passes — accelerates dramatically for 0DTE options as expiration approaches.
The aggregate gamma positioning of options market makers — determines how dealer hedging amplifies or dampens SPX price moves.
A defined-risk options strategy that profits from directional movement — SPXXL's primary recommended structure for most session types.
SPXXL's proprietary projected closing price range for SPX, computed using session classification, gamma exposure, and intraday momentum.