What Are 0DTE Options & Why Traders Love Them

If you've spent any time around options trading communities recently, you've almost certainly heard the term 0DTE. It stands for zero days to expiration — options contracts that expire on the same day they're traded. They've exploded in popularity over the last few years, and for good reason: they're cheap to enter, move fast, and when the trade goes right, the percentage gains can be extraordinary.

But they're also unforgiving. A 0DTE option can go from profitable to worthless in under an hour. This guide covers everything you need to understand before you trade your first zero-day contract.

What Exactly Is a 0DTE Option?

An options contract gives you the right — but not the obligation — to buy or sell 100 shares of an underlying asset at a specific price (the strike price) before a specific date (the expiration date). When that expiration date is today, you're holding a 0DTE option.

Most major index ETFs — SPY, QQQ, IWM — now offer options expiring every single trading day of the week. That means on any given Monday through Friday, you can open and close a position that expires by 4:00 PM ET the same day.

How 0DTE Options Are Priced

Theta — Time Decay Is Brutal

Options lose value as they approach expiration — this is called theta decay. On a 0DTE contract, theta decay is at its absolute maximum. Every hour that passes with the trade going nowhere eats into the option's value. This works against buyers and in favor of sellers.

Delta — How Much the Option Moves

Delta measures how much an option's price changes relative to a $1 move in the underlying. An at-the-money 0DTE option has a delta near 0.50, meaning it moves about $0.50 for every $1 SPY moves. Out-of-the-money options have lower deltas but can spike quickly if the underlying moves toward the strike.

Gamma — The Accelerant

Gamma is the rate at which delta changes. On 0DTE options, gamma is extremely high near the money. This is what creates the explosive moves traders are chasing — a small move in SPY can cause delta to surge, dramatically increasing the option's value in minutes.

Types of 0DTE Trades

Why Traders Are Drawn to 0DTE

The appeal is straightforward: low entry cost, no overnight risk, and the potential for massive percentage returns on a single session. A call option bought for $1.20 that hits $3.50 by noon is a 191% return in a few hours. You don't get that in stocks.

There's also a psychological element — 0DTE trading forces discipline. You can't "wait it out" for weeks hoping a trade recovers. Either the setup works today or it doesn't. That clarity appeals to traders who prefer defined, time-boxed decisions.

The Real Risks You Need to Understand

0DTE options can expire completely worthless — and they frequently do. Studies suggest the majority of 0DTE options bought outright expire at zero. That's not a reason to avoid them, but it is a reason to size positions appropriately and always use defined stops.

The main risks are:

• Total loss of premium — if the underlying doesn't move as expected, your contract goes to zero by 4 PM.
• Whipsaws — intraday price swings can stop you out before the move you were anticipating actually happens.
• Liquidity drops late in the day — spreads on deep out-of-the-money contracts can widen significantly after 3 PM.
• Overtrading — the low cost of entry makes it easy to take too many trades and compound losses.

Getting Started With 0DTE Trading

Before placing your first 0DTE trade, make sure you have options approval on your brokerage account (usually Level 2 for buying calls and puts). Platforms like Tastytrade, TD Ameritrade/thinkorswim, and Interactive Brokers are popular choices among active options traders.

Start by paper trading or using very small position sizes. Get comfortable watching how 0DTE options behave relative to the underlying during different parts of the session — the open, mid-morning, midday consolidation, and the afternoon run into close each have distinct characteristics.

Many traders who start doing their own 0DTE analysis eventually subscribe to a curated picks service to supplement their own work — getting a second set of eyes on setups from someone actively trading the same positions adds value regardless of your experience level.