A 0DTE option is an option contract that expires today. If you open the position in the morning, the contract will either be exercised or expire by the closing bell. There is no “tomorrow” for this option — all uncertainty must resolve inside one session.
Same Contracts, Different Phase of Life
0DTE contracts are not a special product created by the exchange. They are simply standard listed options on their expiration date. What changes is the market’s behavior:
- Time value is almost gone, so theta is concentrated intraday.
- Small price moves can flip payoff quickly, so gamma is high.
- Implied volatility can rise or collapse around events within hours.
Why Traders Use 0DTE
0DTE options are used by different participants for different reasons:
- Portfolio hedgers use them to reduce intraday event risk.
- Systematic income strategies sell same-day premium under tight risk rules.
- Discretionary traders express short-lived directional views with defined capital.
0DTE as a Risk Transfer Mechanism
A useful mental model is: “I am not buying a ticket. I am buying or selling intraday risk that someone else wants to transfer.” On macro days, long-term investors may want to offload today’s downside to someone willing to take it for a price.
From Gambling to Framework
0DTE becomes gambling when there is no plan: no entry rules, no sizing logic, no exit criteria. It becomes a structured framework when you:
- Define when you will and will not trade 0DTE.
- Limit daily risk in dollar terms, not just contracts.
- Use rules to exit instead of emotions.
This page is for education only and does not recommend any trade. Later articles discuss specific frameworks, including covered calls and put-selling overlays, together with their risk profiles.