0DTE Options Fundamentals

The foundational knowledge required to trade zero-days-to-expiration options safely. Understand the core mechanics, risks, and structural differences of 0DTE contracts.

The Basics of 0DTE Trading

Trading 0DTE options requires a deep understanding of market mechanics. Because the contracts expire on the same day, time decay (Theta) is hyper-accelerated, and price movements (Gamma) are violently magnified.

Our fundamentals hub is designed to provide traders with the exact mechanical knowledge needed to navigate settlement risks, liquidity concerns, and structural differences between index and ETF options.

Key Concepts Tracked

Settlement & Assignment: Learn the critical difference between cash-settled index options (SPX) and physically settled ETF options (SPY) to avoid catastrophic assignment risks.
Liquidity & Spreads: Understand why tight bid-ask spreads are mandatory for 0DTE success, and how liquidity shifts throughout the trading day.
Volume vs. Open Interest: Discover why traditional options metrics like Open Interest are largely irrelevant for 0DTEs, and why intraday volume is the true indicator of dealer positioning.

Frequently Asked Questions

What does 0DTE mean?▼

0DTE stands for Zero Days to Expiration. It refers to options contracts that expire on the same day they are traded.

Are 0DTE options cash settled?▼

Index options like SPX are cash settled, meaning no shares change hands. ETF options like SPY and QQQ are physically settled, which introduces assignment risk.

Can you hold 0DTE options overnight?▼

No, 0DTE options expire at the end of the trading day. Any remaining value is settled, and the contracts cease to exist.

Explore 0DTE Coverage

SPX 0DTE SPY 0DTE QQQ 0DTE Volatility Macro Market Recaps

Financial Risk Disclaimer

The content provided on 0DTEOptionsNews.com is strictly for informational and educational purposes. We provide structural market analysis and track macroeconomic news; we do not provide individualized investment advice. Trading zero-days-to-expiration options involves extreme risk, massive intraday volatility, and may lead to a total loss of capital. Market data may be delayed. Always verify information independently.