0DTE options and why they are different

In short

A friend of mine once asked why anyone would bother with an option that dies before supper. He had a fair point. A zero days to expiration option, which traders call a 0DTE, is a contract that ends on the very day it is traded. You have probably heard that these are exciting, and they are. They are also unforgiving. Time works against the buyer all day long, and the clock does not care how sure you felt that morning. If you are holding one, you are holding it for hours, not weeks. Know your most possible loss before you click, and keep the size small enough that a bad day stays a bad day and never becomes a bad year.

The whole of it

What it is

I once watched a neighbor buy a lottery ticket at the gas station and say, with a grin, that he knew exactly what he was paying for. That is a fair way to start thinking about a 0DTE option. It is a regular option contract, which gives its owner the right to buy or sell something at a set price. The only thing that makes it special is the calendar. It expires today.

Most options people have heard of run for weeks or months. A 0DTE has until the closing bell, and then it is done. If it is worth something at that moment, the owner collects. If it is not, the owner gets nothing, and the money paid is gone.

Not every stock or fund offers one. The contracts that trade with expirations every single weekday are mostly tied to broad index products and a few popular funds. The Cboe, which runs the exchange where many of these index options trade, publishes its list of products and expiration dates on its own website. Your broker will show you which ones are available to you.

You may wonder why people want such a short contract. The honest answer is that it is cheap and it moves fast. A small price swing in the thing it follows can turn a few dollars into many, or into zero. That speed is the whole appeal, and the whole danger. It cuts both ways.

How it works

If you are new to options, here is the plain picture. A call option gains value when the price of the thing it follows goes up. A put option gains value when that price goes down. The price you pay for the contract is called the premium. One contract usually covers 100 shares or 100 units of the thing it follows, so the premium you see gets multiplied by 100.

Now add the clock. Every option has two kinds of worth. One part is the real, built in value, which is how far the price has already moved in your favor. The other part is hope, which traders call time value. It is what people will pay for the chance that things might still go your way. With months to go, hope is worth a lot. With hours to go, hope melts fast.

That melting is called time decay, and on a 0DTE it is brutal. The contract can lose much of its hope value by lunchtime even if nothing else happens. So the buyer needs the price to move, and to move soon, and in the right direction. Being right about direction but wrong about timing still loses money.

There is a second feature that surprises people. Near the end of the day, a small price move can swing the contract a great deal. Traders call this gamma, which just means how fast the contract's behavior changes as the price shifts. A contract that looked hopeless at noon can look rich at 3:30, and the reverse is just as true.

Sellers of these contracts feel the other side. A seller collects the premium up front and hopes the contract expires worthless. That sounds easy until the price lurches against them. Some positions can lose far more than the premium collected, so selling needs much more caution and usually a higher level of broker approval. Your broker sets those approval levels, and you can read the rules in the options agreement you signed.

Settlement is the last piece. Many index options settle in cash, meaning you receive or pay a dollar amount rather than taking delivery of shares. Many are also European style, which means they can only be used at expiration and not before. Fund options are different. Options on funds are often American style, which means they can be used any time before expiration. Whether they settle in shares or in cash depends on the contract, so do not assume. Read the contract details before you trade.

The numbers, and where to find yours

Every number that matters is on a page you can read yourself. The first is the contract multiplier, which is almost always 100. It is listed in the contract specifications on the exchange website, such as the Cboe product pages. The second is the premium, shown in your broker's option chain. The third is your broker's approval level for your account, which sits in your account settings and your options agreement.

Then there is the cost side. Brokers charge a per contract fee on most options trades, and the fee schedule is posted on each broker's own pricing page. Your broker also has to give you the options disclosure document, which is published by the Options Clearing Corporation and is titled Characteristics and Risks of Standardized Options. Read it once. It is plain and it is written for you.

Taxes matter too. The IRS explains how it treats options gains and losses in Publication 550, Investment Income and Expenses. Some broad index options get special treatment under what the tax code calls Section 1256 contracts, and the rules differ from options on single stocks. Because those rules and rates can change, check the current IRS pages and ask a tax professional about your own case. Any limit or rate set by law lives there, and I will not guess at it here.

A worked example

Let me tell you about a woman named Dana. She is a nurse who earns 52,000 dollars a year and has set aside 500 dollars she can afford to lose. She sees a 0DTE call on an index. It costs 2.00 in premium, and the multiplier is 100.

Her cost is 2.00 times 100, which is 200 dollars. Add a fee of 1 dollar for the contract, and she has put in 201 dollars. That 201 dollars is the most she can lose. She cannot lose more as a buyer.

Her contract lets her profit only if the index finishes above the strike price plus what she paid. Say the strike is 5,000 and she paid 2.00. Her break even is 5,000 plus 2.00, which is 5,002. If the index closes at 5,010, her contract is worth 10 points, or 10 times 100, which is 1,000 dollars. Her profit is 1,000 minus 201, which is 799 dollars.

Now the other day. The index closes at 5,001. Her contract is worth 1 point, or 100 dollars. She paid 201, so she loses 101 dollars even though she was right about direction. She needed 5,002 and fell short by one point.

And the worst day. The index closes at 4,995, below the strike. Her contract is worth nothing. She loses all 201 dollars. Dana looks at that number, takes a breath, and is glad she sized the trade so it stings but does not sink her. That is the whole lesson in one story. Check each figure above: 2.00 times 100 is 200, and 200 plus 1 is 201.

Where it goes wrong

I have noticed that the trouble rarely comes from the first trade. It comes from the third, when someone tries to win back what the first two took. A 0DTE trade is fast, so losses pile up fast too. Five quick trades in one afternoon can add up to more than a month of savings.

Another snag is buying a contract that is far from the current price because it looks cheap. A cheap contract is cheap for a reason. It needs a big move in a few hours, and that rarely happens. Many such contracts simply expire worthless.

Fees and spreads also bite. The spread is the gap between the price buyers offer and the price sellers ask. On a fast day that gap can widen, and you pay it coming in and going out. On a small trade, those costs take a real slice.

Selling is where the risk gets steep. A seller of an uncovered contract can face losses much larger than the premium taken in. Your broker may ask for a large cash cushion, called margin, and can close your position if the account runs short. Please read your margin rules first.

Last, watch your own feelings. Speed makes a person feel clever. Be careful with that. A winning afternoon says little about skill, and a losing one says little about bad luck.

Questions to answer before you leave this page

Do you know the most you can lose on this trade, and can you lose it without losing sleep? Have you read the Characteristics and Risks of Standardized Options document from the Options Clearing Corporation? Does your broker approve you for the kind of trade you have in mind, and do you understand what that approval level allows? Do you know whether your contract settles in cash or in shares, and whether it can be used early? Have you added up the fee, the spread, and the time decay, so the real cost is no surprise? Have you checked the IRS Publication 550 pages or asked a tax professional how your gain or loss will be treated? And if the trade goes wrong by noon, do you already know what you will do next?