On This Page
Key Takeaways
- 0DTE means the option expires on the current trading day.
- Calls, puts, and spreads all become 0DTE on their own expiration date.
- Near-the-money gamma makes delta respond sharply as the final trading hours pass.
- At expiration, calculate intrinsic value and subtract the entry premium to obtain the option’s profit or loss.
- Match the trade to its final trading time, settlement value, exercise process, and planned exit.
What are 0DTE options?
0DTE options are options traded on the day they expire, with zero days to expiration and only hours of time value left. The label describes remaining time, not a separate product: a call listed months earlier becomes 0DTE when its expiration day arrives, just like a recently listed series with the same final date.
That short horizon lets traders match an option position to an intraday thesis or a same-day event. The strike, entry premium, and settlement terms define the trade.
0DTE gamma and theta on the final day
Delta measures the option’s response to the underlying. Gamma measures how that delta changes. Near the money, gamma becomes especially concentrated as expiration approaches, so small price moves produce large changes in directional exposure. These are model sensitivities with other inputs held fixed, so reprice the full option for larger scenarios.
Theta measures the effect of elapsed time with other pricing inputs held fixed. Read it for the selected contract and combine it with the price and volatility scenarios. At expiration, remaining extrinsic value is zero and the contract resolves to its intrinsic value.
For a long call, expiration profit per unit is max(settlement − strike, 0) minus the entry premium. The result varies continuously with the settlement value. Apply the multiplier to turn that result into contract dollars.
Formula
Long call expiration P/L = [max(S − K, 0) − premium] × multiplier; call breakeven = K + premium- S is the contract’s settlement value and K is the strike.
- Index-option premiums are quoted in points. A six-point premium with a $100-per-point multiplier costs $600.
- Long put expiration P/L = [max(K − S, 0) − premium] × multiplier; put breakeven = K − premium.
- These calculations use the executed entry premium and exclude separate transaction fees.
0DTE options example: a same-day 5,010 call
An index trades at 5,000. A trader buys one European-style, cash-settled 5,010 call expiring at the end of today’s session for six index points. The multiplier is $100 per point.
- Premium paid: $6.00 × 100 = $600 for one contract
- Breakeven at expiration: 5,010 + 6.00 = 5,016
- Settlement at 5,025: (5,025 − 5,010) × 100 = $1,500 cash credit
- Net result at 5,025: $1,500 − $600 = $900 before commissions and fees
- Settlement at 5,005: the call finishes out of the money and the full $600 is lost
A 25-point advance to 5,025 produced a $900 gain, while an advance that stalled 20 points lower at 5,005 produced a total loss of the $600 premium. At expiration there is no remaining extrinsic value to cushion the outcome, so the position resolves to its intrinsic value or to zero.
At 5,025, the call pays $1,500 and produces a $900 gain. At 5,013, it pays $300 and produces a $300 loss. At 5,016, the payout matches the $600 entry cost. At 5,010 or below, its intrinsic value is zero. These points form one continuous payoff curve.
Payoff at expiration
Illustrative figures from this page's example, priced by the InsiderFinance options profit calculator. Probability assumes 25% volatility, a 4% rate and a same-day expiration.
- Max Profit
- Unlimited
- Max Loss
- -$600.00
- Break-Even
- $5,016.00
Interactive payoff loads as you reach it
Load this setup on live SPY options. Move the strikes and scrub to any date.
Build This StrategyHow 0DTE options settle
Cash-settled index options resolve the exercised intrinsic value through cash. Physically settled equity and ETF options create share deliveries when exercised or assigned. Use the exact series to identify its multiplier, exercise style, trading deadline, and settlement value.
For the traditional AM-settled SPX series, the published specification ends trading on the preceding business day. Expiring PM-settled SPXW contracts trade until 4 p.m. Eastern on a full trading day and until 1 p.m. Eastern on a half trading day, and they use the closing settlement calculation. The product determines the clock.
How traders plan a 0DTE trade
Start with the catalyst and the time available for the setup. Compare the nearby strikes and the complete payoff. Inspect the quoted spread and size to plan the entry and exit, then decide whether the position will close in the market or proceed through settlement.
Options flow filtered to the target expiration shows the contracts trading around the setup, and the options profit calculator shows the strike, premium, breakeven, and final dollar outcomes before entry.
Risks and limitations of 0DTE options
- Size for the full premium. No extrinsic value remains at expiration to cushion a miss: the 5,010 call loses its full $600 at 5,005 even though the index finished above its 5,000 starting level.
- Reprice the full position for larger moves. Near-the-money gamma makes delta change sharply, so small moves swing the position’s exposure, and model sensitivities hold the other inputs fixed.
- Check each product’s deadline. Traditional AM-settled SPX series stop trading on the preceding business day, and expiring SPXW contracts close at 1 p.m. Eastern on a half trading day.
- Close an in-the-money equity 0DTE option before the bell when you do not want shares. One that finishes in the money can be exercised and create a stock position.
- Define a short 0DTE position’s risk with a long leg. A short 0DTE option keeps the full exposure of a short option, and a short call’s upside exposure is uncapped.
Bottom line
0DTE options pack all of an option’s gamma and decay into one session, settled by the close. Use them for a defined same-day thesis, know the contract’s exact deadline and settlement, and size each trade so the full premium, or a spread’s defined loss, is a loss you accept.
Clear answers
Frequently Asked Questions
Sources and Further Reading
- OIC: Gamma
- Cboe: SPX Options Specifications
- Cboe: 0DTE Options
- Cboe: SPX Weeklys Options Specifications
- Options Industry Council: Options Exercise FAQ
- FINRA: Options A to Z, The Basics to the Greeks
How entries are sourced, calculated and updated: editorial methodology.