0DTE Options Trading: What You Need to Know Before You Start

Zero days to expiration — 0DTE — options are the fastest-growing segment of the options market. On any given day, 0DTE contracts on SPX account for nearly half of all SPX options volume. Retail traders have flooded in chasing the volatility.

Before you join them, understand exactly what you're trading.

What are 0DTE options?

0DTE options expire on the day they're traded. SPX now has expirations every trading day (Monday through Friday), making daily options available year-round. SPY, QQQ, and a handful of large-cap names also have frequent expirations.

Because they expire today, 0DTE options have essentially zero time value — they're almost entirely intrinsic value (for in-the-money options) or pure lottery ticket (for out-of-the-money options). Theta is at maximum, gamma is extreme.

The appeal: leverage and speed

0DTE options are cheap in dollar terms. A short-dated, slightly out-of-the-money SPX option might cost $2–5 per share ($200–500 per contract). A 10-point favorable move in SPX could double that position.

That leverage is the draw. A well-timed 0DTE trade can return 100–500% in a single session.

The reality: gamma is relentless

The flip side of maximum theta is maximum gamma. Gamma measures how fast delta changes as the underlying moves. Near expiration, gamma becomes enormous — small moves in the underlying create large, fast changes in the option's price.

For buyers, this means: if SPX doesn't move in your direction quickly, your option loses most of its value rapidly. There's no "waiting for the trade to work" — by 3pm, if the move hasn't happened, your option is likely near zero.

For sellers, gamma risk is the dominant concern. A sudden large move — a Fed comment, an economic data print, a geopolitical shock — can take a short 0DTE position from comfortable profit to max loss in minutes.

Who 0DTE suits (and who it doesn't)

It may suit you if:

• You can actively monitor the position throughout the trading session
• You have clearly defined entry and exit rules
• You're sizing positions as a small percentage of total capital
• You understand that losing 100% of the premium on any given trade is a normal outcome, not a catastrophe

It probably doesn't suit you if:

• You want to enter a trade and check back later
• You're counting on specific trades to cover bills or expenses
• You haven't yet developed consistent rules for when to close or adjust
• Your account is small enough that a string of losses changes your behavior

Common 0DTE approaches

Selling premium (short strangles or iron condors): Selling an OTM call and put on SPX expiring same-day. You collect a small credit and profit if SPX stays in a range. Works until it doesn't — a trending day blows through one side. Many traders set a stop at 2–3x the premium received.

Buying directional: Buying a call or put based on a directional bias for the day. Cheap in dollar terms, near-zero in probability-adjusted terms. Most of these expire worthless. The winners that hit can be dramatic.

Scalping spreads: Buying vertical spreads at a low debit ($0.25–0.75) targeting a specific price level. Defined risk, defined reward. More manageable than naked directional bets.

The math of consistency

Suppose you sell 0DTE iron condors every day, collecting $200 per day and setting a max loss of $600.

• Win rate needs to be above 75% to be profitable over time
• A 3-day losing streak (not uncommon during trending markets) wipes out 9 winning days

This math isn't discouraging — it's realistic. Consistent 0DTE sellers do exist and some are quite profitable. But they have:

1. Win rates measured over hundreds of trades, not dozens
2. Position sizing that makes a losing streak uncomfortable but not devastating
3. Clear exit rules followed mechanically, not emotionally

Track your 0DTE results separately

One of the most important things 0DTE traders can do is track these trades separately from their longer-dated positions. The risk profile is completely different, the mechanics are different, and the psychology is different.

Mixing 0DTE P&L with multi-week positions obscures whether either strategy is actually working. Your journal should let you filter by DTE so you can see the real picture.

Are your 0DTE trades profitable after 100 instances? Which days of the week perform best? Do your directional trades work, or are you just getting lucky on the winners and averaging down on the losers?

The traders who last in 0DTE have answers to these questions. The ones who blow up don't.

Track your 0DTE trades separately with theta journal →