A Closer Look at 0DTE Options: Short-Term Trading Explained

Zero Days to Expiration (0DTE) options have surged in popularity, offering traders the chance to capitalize on same-day price movements. These contracts expire on the same day, creating a fast-paced environment that can lead to significant gains—or total losses. This article explores how 0DTE options work, why some options traders are drawn to them, and real-world data that highlights both their potential and risks.

1. What Are 0DTE Options?

A 0DTE option is a contract that expires at the end of the current trading day, meaning it can no longer be traded after the market closes. While all options eventually expire, 0DTE options have no time buffer, making them highly sensitive to price movements of the underlying security.

Previously, options on major indices and ETFs expired only on certain days of the week. For example, index options such as SPX (S&P 500) and NDX (Nasdaq 100), along with ETF options, traditionally expired on Mondays, Wednesdays, and Fridays.

However, in 2022, the Chicago Board Options Exchange (CBOE) expanded expiration dates for key index and ETF options to include Tuesdays and Thursdays. This change effectively created daily expirations, significantly increasing 0DTE volume and making these strategies more accessible and frequently used.

2. Why have 0DTE Options Increased in Popularity?

Some traders are drawn to 0DTE options for several reasons:

• Quick Potential Returns – Expiring within hours, 0DTE options can experience large price swings, offering the potential for significant gains in a short time.

• Lower Costs – Since they have minimal time value, 0DTE options can have lower premiums than longer-dated options, allowing traders to take larger positions with less capital.

• High Sensitivity to Price Movements – Due to their extreme gamma exposure, 0DTE options can react strongly to even small market moves.

However, these advantages come with risks:

• Rapid time decay (theta) erodes value if the market doesn't move favorably.

• Extreme price sensitivity (gamma) can lead to fast losses or total depletion of an option's value.

• Execution risks are higher due to the fast-paced nature of these trades.

3. Why Index Options Dominate 0DTE Trading

While ETF options also reach 0DTE status on their expiration day, index options are far more popular due to structural advantages:

• European-Style Exercise – Unlike stock and ETF options, which can be exercised at any time, index can only be exercised at expiration, eliminating early assignment risk.

• Cash Settlement – Instead of physical stock delivery, index option settle in cash, simplifying trading and avoiding stock-handling complexities.

• Daily Expirations – With index and ETF options now expiring almost every trading day, traders have more opportunities to engage in 0DTE strategies.

Because of these structural advantages relative to other 0DTE options, index 0DTE options are among the most actively traded contracts.

4. Real-World Example: 0DTE Options on a High-Volatility Day

To illustrate how 0DTE options could behave, let's analyze a trading session where the market experienced significant intraday movement.

On March 3, 2025, the SPX opened at 5,968.33 and closed at 5,849.72, a -1.76% decline. This movement had a major impact on 0DTE options, particularly those with a strike price of 5,970

To analyze the impact, let's compare how different days to expiration (DTE) reacted in this scenario, using the ATM strike price of 5970.

• 0DTE – The option expiring on the same day

• 10DTE – The option expiring in 10 days

• 20DTE – The option expiring in 20 days

5. Call Options and Put Options (Strike 5,970)

These numbers highlight the volatility and rapid price swings of 0DTE options compared to longer-dated contracts.

These gains and losses reflect the price changes during the trading session, assuming the trader successfully closed their position at these price before market close. If a trader did not exit in time, an out-of-the-money option would expire worthless, while an in-the-money index option would settle in cash at expiration.

6. SPX Final Settlement Price: 5,849.72

For the 5,970 Strike Put Option:

• If closed before expiration at $127.28, the P/L is +$88.93.

• If held until expiration, the SPX settlement price is 5,849.72, so the final intrinsic value is:5,970 - 5,849.72 = $120.28, making the P/L +$81.93 instead.

For the 5,970 Strike Call Option:

• If closed before expiration at $0.05, the P/L is -$13.70.

• If held until expiration, since SPX closed at 5,849.72 (below 5,970), the call expires worthless.

• Final P/L = -$13.75 instead.

7. What This Case Teaches Us About 0DTE Options?

8. Cost Efficiency and Risk-Reward Trade-Off

0DTE options are cheaper than longer-term alternatives, offering a lower upfront cost with higher potential returns—but also greater risk.

• The 0DTE put opened at $38.35, significantly lower than the 10DTE ($70.60) and 20DTE ($90.20) equivalents.

• While the 0DTE put gained +266.80%, the 0DTE call lost -99.64%, showing how these contracts can either surge in value or become worthless by day's end.

9. Time Decay (Theta) and Expiration Pressure

Theta decay is most aggressive in 0DTE options, requiring favorable price movement for profitability.

• The 0DTE call lost almost all its value ($13.75 → $0.05) as it expired out-of-the-money.

• The 0DTE put gained despite time decay, as the market drop moved it deeper in-the-money, counteracting theta's effect.

• In this example, the longer-dated options retained value since they still had time premium.

10. Gamma's Impact on Price Sensitivity

Gamma, which measures how fast delta changes, is highest in near-expiration options, making 0DTE contracts highly reactive to underlying price shifts.

• The 0DTE put surged as gamma accelerated delta toward 1 when the market fell below 5,970.

• The 0DTE call collapsed as gamma quickly reduced its delta to near 0 when the market moved further out-of-the-money.

• In this example, the longer-dated options saw milder movements, as lower gamma kept their deltas more stable.

This case highlights the unique dynamics of 0DTE options, where lower upfront costs come with higher risk and extreme sensitivity to price movements. While a well-timed, favorable price shift can lead to significant gains—such as the 266.80% return on the put option—a lack of movement or an unfavorable trend can result in total losses, as seen with the -99.64% drop in the call option. Time decay (theta) exerts constant pressure, making favorable price movement essential for profitability, while gamma amplifies price sensitivity, causing sharp swings in value. Compared to longer-dated options, 0DTE contracts require precise timing and market awareness to navigate effectively.

11. Who should consider 0DTE Trading?

0DTE trading is not for everyone.

It is appropriate for:

• Experienced Traders – Those familiar with options, volatility, and execution speed.

• High-Frequency Traders – Those comfortable making multiple trades in a short time frame.

• Risk-Tolerant Investors – Those who can manage high risk and potential losses.

It is NOT appropriate for:

• Beginner Traders – The rapid price swings can be overwhelming.

• Long-Term Investors – These options expire quickly, making them unsuitable for long-term strategies.

• Traders Without a Risk Management Plan – Without stop-losses or hedging, losses can be severe.

12. Conclusion: Finding the Right Approach to 0DTE Trading

0DTE options can provide a way to trade short-term market moves, possibly offering opportunities for gains within a short timeframe, while requiring a smaller upfront investment . While they come with unique risks—like fast time decay and sharp price swings—traders who understand these factors can potentially use them effectively as part of their strategies.

As the old saying goes, if you understand where the risk comes from, you can better manage it. Liquidity, execution speed, and risk management are key to success. Choosing highly liquid options, setting clear entry and exit plans, and being mindful of theta and gamma effects can help traders navigate the fast-paced nature of 0DTE trading.

The examples we’ve shown focus purely on long call and long put positions, but there are various other strategies traders use to manage risk and try to optimize returns—such as credit spreads, iron condors, and ratio spreads. With 0DTE options growing in popularity among some investors, the market continues to evolve, offering different ways to participate depending on your risk tolerance and trading objectives.

Whether you're looking to capitalize on intraday volatility or explore structured strategies, 0DTE options can be a useful tool when approached with the right mindset. With practice and experience, traders can better identify the balance between risk and reward, and can tailor their strategies to align with their objectives.

• Disclaimer

  Options trading is risky and not appropriate for everyone. Read the Options Disclosure Document (https://j.moomoo.com/017y9J）before considering trading. Options are complex and you may quickly lose the entire investment. Certain complex options strategies carry additional risk, including the potential for losses that may exceed the original investment amount. Customers should consider their investment objectives and risks carefully before investing in options. Supporting documentation for any claims will be furnished upon request. Because of the importance of tax considerations to all options transactions, the customer considering options should consult their tax advisor as to how taxes affect the outcome of each options strategy. Options trading subject to eligibility requirements. Strategies available will depend on options level approved.

  Zero Days to Expiration (0DTE) or Same Day expiration options: Keep in mind, opening new options positions close to or on their expiration date comes with substantial risk of losses for reasons that include potential volatility of the underlying security, limited time to expiration, flagging as a pattern day trader, and others. This type of strategy is not suitable for all investors and should be utilized only by sophisticated investors who understand the essentials of options and the risks of 0DTE options. For info on our options close out policy, refer to www.moomoo.com/us/support/topic4_220

  Exchange traded Index options are similar to exchange traded equity options in that all options involve risk and are not suitable for all investors. For a better understanding of the differences between index options and equity option please visit the resources available through the OCC’s Options Industry Council here: Equity versus Index Options

  Index options have special characteristics and risks. Index option exercises are settled with cash, not securities. In addition, because the exercise price of an index option is generally based on the closing index value, an index option that is in the money during trading hours may be out of the money when the closing value is calculated — a risk to consider whenever you place an exercise order before the closing value is known.

  This presentation is for informational and educational use only and is not a recommendation or endorsement of any particular investment or investment strategy. Investment information provided in this content is general in nature, strictly for illustrative purposes, and may not be appropriate for all investors. It is provided without respect to individual investors’ financial sophistication, financial situation, investment objectives, investing time horizon, or risk tolerance. You should consider the appropriateness of this information having regard to your relevant personal circumstances before making any investment decisions. Past investment performance does not indicate or guarantee future success. Returns will vary, and all investments carry risks, including loss of principal. Moomoo makes no representation or warranty as to its adequacy, completeness, accuracy or timeliness for any particular purpose of the above content.

  Moomoo is a financial information and trading app offered by Moomoo Technologies Inc.

  In the U.S., investment products and services available through the moomoo app are offered by Moomoo Financial Inc., a broker-dealer registered with the U.S. Securities and Exchange Commission (SEC) and a member of Financial Industry Regulatory Authority (FINRA)/Securities Investor Protection Corporation (SIPC).

  In Singapore, investment products and services available through the moomoo app are offered through Moomoo Financial Singapore Pte. Ltd. regulated by the Monetary Authority of Singapore (MAS). Moomoo Financial Singapore Pte. Ltd. is a Capital Markets Services Licence (License No. CMS101000) holder with the Exempt Financial Adviser Status. This advertisement has not been reviewed by the Monetary Authority of Singapore.

  In Australia, financial products and services available through the moomoo app are provided by Moomoo Securities Australia Limited, an Australian Financial Services Licensee (AFSL No. 224663) regulated by the Australian Securities and Investment Commission (ASIC). Please read and understand our Financial Services Guide, Terms and Conditions, Privacy Policy and other disclosure documents which are available on our website  https://www.moomoo.com/au.

  In Canada, order-execution only services available through the moomoo app are provided by Moomoo Financial Canada Inc., regulated by the Canadian Investment Regulatory Organization (CIRO).

  In Malaysia, investment products and services available through the moomoo app are offered through Moomoo Securities Malaysia Sdn. Bhd.("Moomoo MY") regulated by the Securities Commission of Malaysia (SC). Moomoo Securities Malaysia Sdn. Bhd.is a Capital Markets Services Licence (License No. eCMSL/A0397/2024) holder. This advertisement has not been reviewed by the SC.

  Moomoo Technologies Inc., Moomoo Financial Inc., Moomoo Financial Singapore Pte. Ltd., Moomoo Securities Australia Limited