A trader buys an SPX call at 10:15 a.m. for 4.80. By 10:40 the index has moved 12 points in their favor and the contract is worth 11.00. Thirty minutes later the index has given it all back and the same contract is trading at 0.65. That's a day in the life of 0DTE options: contracts that expire at the end of the session you're trading them in, where the entire outcome is decided in hours rather than weeks.
The term stands for "zero days to expiration." Any option becomes a 0DTE option on its expiration date, but the phrase usually refers to index and ETF products that list expirations every trading day, so a 0DTE contract is available whenever you want one. This guide covers how these contracts are priced, which products actually offer daily expirations, where the risk really sits, and how 0DTE trading fits inside a simulated funded account. It's the starting point for our wider 0DTE options coverage.
What "zero days to expiration" actually means
An option's life is measured in days to expiration (DTE). A contract with 30 DTE expires in a month; one with 1 DTE expires tomorrow. At 0 DTE, the contract expires at the close of the current session.
Two things change when a contract reaches its final day:
- Extrinsic value collapses to nothing. Every option is made of intrinsic value (how far in the money it is) and extrinsic value (time and volatility premium). By the closing bell, extrinsic value is zero. Either the option is in the money and settles for its intrinsic value, or it's out of the money and expires worthless.
- Price becomes almost entirely a function of where the underlying is right now. With weeks left, a 2% move in the underlying nudges an option's value. With hours left, the same move can multiply it or erase it.
That's the whole appeal and the whole problem. There's no "it might come back next week." The trade resolves today.
Which products have daily expirations
Daily expirations exist on a short list of index and ETF products. The main ones US traders use:
Product | Type | Settlement | Notes |
|---|---|---|---|
SPX | S&P 500 index | Cash, European style | Expirations every trading day; the deepest 0DTE market |
XSP | Mini S&P 500 index | Cash, European style | One-tenth the size of SPX |
SPY | S&P 500 ETF | Shares, American style | Expirations every trading day |
QQQ | Nasdaq-100 ETF | Shares, American style | Expirations every trading day |
VIX | Volatility index | Cash, European style | Wednesday expirations, AM-settled |
Cboe publishes the full contract specifications for its S&P 500 index options, including expiration schedules and settlement mechanics.
Individual stocks are a different story. Heavily traded names like NVDA, TSLA, AAPL and COIN list weekly options, so they have a 0DTE contract on Fridays, and sometimes on a Thursday or Monday when extra weeklies are listed. But you can't trade 0DTE NVDA on a Tuesday. If you want zero-days exposure every session, you're looking at the index and ETF products above.
Cash settlement versus share settlement
This distinction matters more at 0 DTE than anywhere else. SPX and XSP are cash-settled and European style: no early exercise, no shares, just a cash difference if the contract finishes in the money. SPY and QQQ are American-style and settle into shares. A long SPY call that expires one cent in the money turns into 100 shares, which is a problem if you don't have the cash or the permission to hold them.
Closing the position before the bell makes the question moot, which is what most intraday traders do anyway.
How 0DTE options are priced
The option Greeks behave very differently on expiration day. If you want the full picture, our guide to the Greeks walks through each one, but here's what changes at 0 DTE.
Theta is enormous and front-loaded
Theta measures time decay. On a 30-day option it's a slow leak. On a 0DTE option, the entire remaining premium of an out-of-the-money contract has to reach zero by 4:00 p.m. ET, and decay accelerates through the afternoon. An out-of-the-money SPX call that's worth 3.00 at noon can be worth 0.40 at 2:30 with the index unchanged.
This cuts both ways. Buyers fight the clock. Sellers collect it, but take on the gamma risk described next.
Gamma is at its maximum
Gamma measures how fast delta changes. Near the money on expiration day, gamma is extreme: a contract with a 0.30 delta at 1:00 p.m. can have a 0.70 delta twenty minutes later after a modest move in the index, and a 0.05 delta an hour after that. Positions that looked balanced in the morning don't stay balanced.
This is why 0DTE moves feel violent compared to longer-dated contracts. The underlying may move 0.4%, but the option's sensitivity to that move is changing in real time.
Implied volatility matters less than you'd expect
With hours remaining, there isn't much time left for volatility to express itself, so vega is small. What drives the price is realized movement in the underlying. A quiet tape kills long 0DTE positions even when the VIX is elevated; a sharp afternoon trend can pay a long contract that looked dead at lunchtime.
Why traders use 0DTE options
Defined cost. Buying a call or a put caps the loss at the premium paid. For a $100,000 account, a 2.50 SPX call is $250 of risk, known before entry.
No overnight exposure. Gaps are the enemy of a trailing drawdown. A 0DTE position that's closed by the bell can't be hit by an earnings release or an overnight headline.
Capital efficiency. Short-dated contracts cost a fraction of monthly ones. A 30-day at-the-money SPX call might cost $5,000 in premium; the same strike expiring today might cost $600.
Fast feedback. You find out whether the idea worked the same day, which matters when you're working through a prop firm evaluation and want to compound progress rather than wait on a swing position.
Liquidity. SPX and SPY daily expirations are among the most actively traded contracts in the US options market, which keeps spreads tight on near-the-money strikes.
Where 0DTE trading goes wrong
The honest list:
- Premium decays to zero, fast. A directional view that's right but early is still a loss. There's no recovery window.
- Spreads widen on the wings. Far out-of-the-money strikes look cheap because they're nearly worthless. Buying a 0.15 delta contract is paying for a lottery ticket, and getting filled on the way out can cost half the position value.
- Position sizing drifts. Because the contracts are cheap, it's easy to buy ten instead of two. Ten cheap contracts with 0.60 delta is a real directional position.
- Overtrading. New expirations every session means an infinite supply of setups. Three clean trades a day beats fifteen.
- Chop. The worst outcome for a long 0DTE buyer isn't a wrong direction, it's no direction. Sideways price action bleeds every long contract on the board.
A simple 0DTE trade, start to finish
Say QQQ opens weak, finds a base in the first 45 minutes, and reclaims the opening range at 10:30. You take the view that the afternoon trades higher.
- Structure: long call expiring today, one or two strikes out of the money, roughly 0.40 to 0.50 delta. The mechanics of this trade are the same as any other long call — the difference is that everything is compressed into one session.
- Cost: suppose 1.20 per contract, $120 of risk per contract.
- Stop: a price level on the underlying, not just a percentage of premium. If QQQ loses the base, the idea is wrong and the option comes off.
- Target: either a level on the underlying or a multiple of the premium paid. Many traders take half off at a double and let the rest run with a trailing stop.
- Hard exit: before the close, regardless. Holding a 0DTE contract into settlement is a coin flip, and on a share-settled product it's also an assignment problem.
Sizing matters more than the setup. On a $50,000 account with a 5% loss limit, a single trade risking $120 is 0.24% of equity. Ten contracts on the same idea is 2.4%, and two bad ones in a row put the account under real pressure.
Frequently asked questions
Are 0DTE options only for day traders?
In practice, yes. A contract that expires today has to be managed today. You can't hold it through a pullback and wait for the thesis to play out next week.
Can you sell 0DTE options instead of buying them?
You can, where permissions allow. Selling collects the fast theta decay but takes on gamma risk: a short strike that's comfortably out of the money at 1:00 p.m. can be deep in the money by 3:00. At Vanquish, selling to open is available on the Advanced Options plan only, and not on SPX, XSP or VIX.
What's the best time of day to trade 0DTE?
The first and last hours carry the most volume and the widest ranges. Midday tends to be the worst environment for long premium, because decay keeps running while the underlying goes nowhere.
How much should I risk on a single 0DTE trade?
Size the position so the premium paid is a small fraction of equity — many traders cap a single idea at 0.25% to 0.5% of the account. The option can go to zero, so treat the full premium as the loss, not the amount between entry and your stop.
Do 0DTE options have higher commissions?
Per-contract rates are the same as any other expiration. The cost that actually bites is the bid-ask spread, which widens on far out-of-the-money strikes and in the final minutes of the session.
Is 0DTE gambling?
It is if the position is sized like a bet and entered without a level, a stop and an exit time. Done with fixed premium risk, a defined invalidation point and a daily trade limit, it's a short-horizon directional strategy like any other. The structure doesn't make the decision for you.
0DTE options reward preparation and punish improvisation. The contracts are cheap, the moves are fast, and the clock never pauses, which means your edge has to come from reading intraday structure and sizing so that a bad hour doesn't become a bad month. If you want to test that process on a simulated account with published rules, no daily loss limit and no time pressure, compare the Vanquish plans and pick the one that matches how you trade.
