0DTE options explained
0DTE stands for zero days to expiration, options contracts that are traded and expire on the same calendar day. They are some of the most actively traded instruments in the options market and have grown dramatically in popularity since major indices introduced daily expiration contracts.
Why 0DTE has exploded in popularity
Historically, the shortest standard options expiry was weekly (Friday). Starting around 2022, exchanges introduced daily expirations on SPY, QQQ, and SPX, meaning there is now an expiration every trading day of the week.
This opened the door to intraday options strategies that weren't previously possible. Today, 0DTE options account for a substantial portion of total SPX options volume on any given day.
Key characteristics of 0DTE options
Extremely high theta decay
An option's entire remaining time value decays to zero within a single trading session. For sellers, every hour that passes without a large move is profit. For buyers, the clock is ticking from the moment you enter.
Peak gamma
Gamma (the rate of change of delta) is at its maximum for 0DTE options. This means delta, and therefore your P&L, can shift very rapidly on small moves in the underlying. A $1 move in SPY can dramatically change the value of a 0DTE option.
Low absolute cost, high leverage
A 0DTE option on SPY might cost $0.50 to $2.00. The leverage is extreme. A $1 move in SPY can double or wipe out a $1.00 option within minutes.
Wide bid-ask spreads (relatively)
Despite high liquidity in absolute terms, bid-ask spreads as a percentage of the option's price can be wide. A $0.10 spread on a $0.40 option is 25% of the option's value.
Who trades 0DTE options
Sellers (theta harvesters): Traders who sell OTM options at market open and aim to close them for a fraction of the premium before the end of the day, or let them expire worthless. The 0DTE SPY wheel and similar intraday premium-selling strategies fall into this category.
Buyers (directional speculators): Traders who buy 0DTE calls or puts to express short-term directional views on intraday catalysts (FOMC statements, CPI releases, or momentum breakouts). The leverage is extreme and so are the potential gains and losses.
The risks of 0DTE trading
0DTE options are not suitable for passive or inattentive traders. The combination of high gamma and rapid theta decay means:
- A position that looks safe at 10am can be severely tested by 2pm
- Spreads can widen significantly in fast markets, making exits expensive
- A gap move (opening gap, news spike) can instantly push a short 0DTE option deep ITM with no time to recover
Gap risk is the most significant risk for overnight 0DTE sellers. If you're selling on the open and the underlying gaps significantly against you, there's no time for the position to recover.
0DTE vs weekly options
| 0DTE | Weekly | |
|---|---|---|
| Time to expiry | Same day | Up to 5 days |
| Theta decay | Entire session | Spread over the week |
| Gamma risk | Extreme | Moderate |
| Cost | Very low | Low |
| Management flexibility | Minimal | More room |
Best practices for 0DTE trading
- Never size 0DTE positions the same way as longer-dated trades, the leverage is fundamentally different
- Define your risk with spreads rather than naked short options
- Set clear stop-loss levels and respect them, 0DTE losses can escalate quickly
- Be aware of intraday catalysts (Fed speakers, economic data releases) that could spike volatility
Related terms: Theta, gamma, pin risk, OPEX, expiration date, short straddle, defined risk
Related terms
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