0DTE options: what zero days to expiration means
The short answer0DTE means zero days to expiration: options traded on the day they expire. SPY, QQQ and SPX list expirations every weekday, so there is a 0DTE contract every trading day. They are cheap and extremely sensitive to the price — gamma is at its highest on the last day — and most of them expire worthless.
Why they exist
Exchanges added more and more expirations until, by 2022, the biggest index products had one every weekday. Since then same-day options have grown into a large share of index option volume.
Why traders use them
- Cheap exposure: with hours left, an out-of-the-money option costs very little.
- Fast reaction: gamma is very high, so a small move in the index changes the option’s value a lot.
- Selling time: sellers collect premium that decays to zero by the close.
The risks
Time decay (theta) is brutal on the last day: an option can lose most of its value in hours if the move does not come. For sellers the risk is the other way — a sudden move can make a cheap short option very expensive. Most 0DTE options expire worthless; the few that pay off can pay many times their cost, which is why they attract both hedgers and gamblers.
How they affect the market — and what end-of-day data misses
Dealers hedge 0DTE positions during the day, which can speed up or calm intraday moves. But a contract opened and closed on the same day never appears in open interest, and contracts that expire today are gone by tomorrow’s count. End-of-day measures — including the gamma exposure, walls and max pain on this site — therefore leave the expiring contracts out and describe the positions that carry over. The volume figures still count them.
Live example: SPY and QQQ today
From the close of Fri, Nov 13, 2026 — this box is rebuilt after every trading day.
SPY, Nov 13, 2026: 6.2% of its open interest was in contracts expiring that day — positions gone by the next morning. Volume that day: 12,340,278 contracts (5,608,422 calls, 6,731,856 puts).
QQQ, Nov 13, 2026: 6.2% of its open interest was in contracts expiring that day — positions gone by the next morning. Volume that day: 8,273,876 contracts (4,046,166 calls, 4,227,710 puts).
Tomorrow’s expiration and its max pain: the SPY & QQQ report.
Questions and answers
What does 0DTE stand for?
Zero days to expiration: an option traded on the same day it expires.
Does SPY have 0DTE options every day?
Yes. SPY, QQQ and the S&P 500 index (SPX) have expirations every weekday, so a 0DTE contract trades every session.
Are 0DTE options risky?
Very. Time decay is fastest on the last day, so buyers lose quickly if the move does not come, and sellers can face sudden large losses when it does.
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