0DTE SPX Strategy

Whether you're new to zero-days-to-expiration or scaling an existing approach, understanding the fundamentals of the 0DTE strategy hub is essential before you trade live capital. This guide covers The S&P 500 Index (SPX) is the undisputed king of zero days to expiration trading. For professional traders, developing a reliable 0DTE SPX strategy is often the core of their intraday business.

What Is SPX 0DTE?

SPX 0DTE refers to options on the S&P 500 Index that expire on the current trading day. Because the SPX is a massive, cash-settled index, its options boast unparalleled liquidity, tight bid-ask spreads, and a market structure that supports high-frequency and algorithmic trading.

Why SPX Is the Preferred 0DTE Underlying

Why do institutional and professional retail traders prefer SPX over other instruments?

• Cash Settlement: SPX options settle in cash. There is no risk of waking up to a massive stock position because you were assigned on a short option.
• European Style: They cannot be exercised early. You only care about the value at the time of expiration (or when you close the trade).
• Tax Advantages: See the Section 1256 treatment below.

SPX 0DTE Iron Condor Setup

The 0DTE Iron Condor is one of the most popular strategies for trading SPX. In this strategy, you sell an out-of-the-money call spread and an out-of-the-money put spread simultaneously. The goal is for the SPX to remain within the "wings" of the condor until expiration, allowing you to collect the premium as theta decays rapidly to zero.

SPX 0DTE Credit Spreads

If you have a directional bias for the day, 0DTE credit spreads are a highly effective SPX strategy. For example, if you believe the market will drift higher, you might sell a put credit spread below the current price. You collect the premium upfront, and as long as SPX stays above your short strike, the spread expires worthless and you keep the credit.

Section 1256 Tax Treatment

One of the biggest advantages of trading SPX over SPY is the Section 1256 tax treatment. In the United States, gains and losses on SPX options are treated as 60% long-term and 40% short-term capital gains, regardless of how long you held the trade. For day traders holding positions for literally minutes or hours, this is a massive tax benefit.

SPX vs SPY: Which Is Better for 0DTE?

While SPX is the professional choice, it requires a larger account size (the index value is roughly 10x that of SPY). SPY options are more accessible for smaller accounts. However, SPY is an ETF, meaning it has American-style, physically settled options with assignment risk and standard tax treatment.

SPX 0DTE Expiration (4:00 PM EST vs 4:15 PM)

While some SPX options and related products trade until 4:15 PM EST, standard PM-settled SPX 0DTE options stop trading at 4:00 PM EST. The settlement value is based on the closing prices of the component stocks of the S&P 500 at 4:00 PM. We also have a detailed comparison on SPX 0DTE vs ES liquidity for those trading futures.

Frequently Asked Questions