Option Strike Spacing: How the Gap Between Strikes Shapes Your Trade in 2026
November 8, 2026
13 min read
Option strike spacing is the gap between one listed strike price and the next on an options chain. On some chains the strikes sit $1 apart. On others they sit $2.50, $5 or more apart. Most traders never look at the gap itself; they look at the strike they want and take the closest one on offer.
That is a mistake, because the gap quietly decides a lot about your trade. It sets how close to the current price you can get, how big each step in delta and premium is when you move up or down the chain, and the narrowest spread you can build. Two traders with the same idea can end up with very different risk simply because one is working on a chain with tight strikes and the other on a chain with wide ones.
In this guide we'll cover what option strike spacing is and who sets it, how the gap shapes a single-option trade, what it does to spreads and position sizing, how to read the spacing on a chain before you commit, and how it fits the published risk rules of a TradeFundrr simulated options account.
Key Takeaways
- Read the gap before you pick a strike. Strike spacing is set by the exchange's listing rules, varies by product and expiration, and the only reliable number is the one on your chain.
- Measure spacing as a percentage of price. A $1 gap on a $50 stock is a bigger step than a $5 gap on a $500 one, so compare chains in percentage terms, not dollars.
- Expect delta and premium to move in steps. Wider spacing means bigger jumps between adjacent strikes, so "one strike further out" can change your risk more than you intended.
- Size spreads from the spacing up. The narrowest vertical spread you can build equals one strike interval, and its maximum value is that interval times the multiplier.
- Fit the step size to your loss limits. In a funded account, check that the smallest building block on the chain is small enough for your per-trade risk before you open the order ticket.
Table of Contents
- What is option strike spacing?
- How strike spacing shapes a single-option trade
- Strike spacing and spreads
- How to read strike spacing on a chain
- Strike spacing in a TradeFundrr funded account
What is option strike spacing?
Option strike spacing, also called the strike interval or strike increment, is the dollar distance between consecutive strike prices listed for the same underlying and expiration. If a chain lists strikes at 100, 101 and 102, the spacing is $1. If it lists 100, 105 and 110, the spacing is $5.
Strikes are listed, not chosen
An option is a contract that gives the buyer the right, but not the obligation, to buy or sell an underlying at a fixed price within a set period. The SEC's investor education site, Investor.gov, describes options as contracts with a fixed price and a specific time period. That fixed price is the strike, and you cannot pick any number you like. You choose from the strikes the exchange has listed.
Exchanges publish the rules for which strikes they list. Cboe's product specifications for S&P 500 Index options, for example, state that SPX strike intervals are five points, with 25-point intervals for far months, and that new series are generally added when the index trades through the highest or lowest strike available. So the gap is a product decision made in advance, not something that shifts with your order.
Spacing differs by product, price and expiration
Different products follow different listing rules. Cboe's specifications for Mini-SPX (XSP) options say strike intervals are generally $1 or greater where the strike is $200 or less, and $5 or greater above $200, and that weekly XSP contracts can be listed at intervals as small as $0.50. Two points stand out from those published rules. Spacing often depends on the price level of the strike, and it can differ between near-term and far-dated expirations of the same product.
Single stocks and ETFs have their own listing programs, and heavily traded names often carry tighter strikes near the current price than thinly traded ones. Rather than memorize a table that may change, treat the chain as the authority. Open it, look at the strikes nearest the money for the expiration you plan to trade, and read the gap directly.
Why the gap matters more than it looks
The strike interval is a resolution setting. A tight interval lets you place a strike almost exactly where your idea says it should go. A wide interval forces you to round, and every rounding decision moves your breakeven, your delta and your cost. Our guide to choosing strike prices for day trades covers which strike fits which plan. This article is about the layer underneath that choice: what the chain lets you choose from in the first place.
How strike spacing shapes a single-option trade
Strike spacing shapes a single-option trade in three ways: how close to the current price your nearest strike can be, how much delta changes from one strike to the next, and how much premium changes with each step. Wider spacing makes all three steps bigger, which means less control over exactly what you are buying.
Your "at-the-money" strike may not be at the money
Traders talk about buying the at-the-money strike as if it sits exactly at the current price. It rarely does. With $1 spacing, the nearest strike can be at most 50 cents away. With $5 spacing, it can be as much as $2.50 away. On a chain with wide strikes, the option you call at-the-money may already be meaningfully in or out of the money.
Illustrative example: an underlying trades at $101.70. On a chain with $1 strikes, the nearest call strike is 102, just 30 cents above the price. On a chain with $2.50 strikes, the nearest is 102.50, 80 cents away. On a chain with $5 strikes, the nearest is 100, which is $1.70 in the money, and the next one up is 105, $3.30 out of the money. Same price, same idea, three different starting points.
Strike spacing
One price, three chains
The same underlying price lands in very different places depending on the gap between listed strikes.
Narrowest spread, $1 chain
$100
Maximum value per contract of a one-interval vertical spread
Narrowest spread, $2.50 chain
$250
Two and a half times the building block of the $1 chain
Narrowest spread, $5 chain
$500
Five times the building block, before you add a second contract
Compare in percent, not dollars. A $1 gap on a $50 stock is 2% of the price. A $5 gap on a $500 stock is 1%. The wider-looking chain is the finer one.
tradefundrr.com
Illustrative example. Prices and strikes are hypothetical; spread values assume a 100 multiplier and ignore premium and fees. Check the strikes your own chain lists. Trading in TradeFundrr accounts is simulated. Not a promise of results.
Delta moves in steps, not smoothly
Delta, the estimated change in an option's price for a $1 move in the underlying, changes continuously as you move away from the money. But you can only buy the strikes that exist, so in practice delta comes in steps. On a tight chain, the step from one strike to the next is small. On a wide chain, moving "one strike further out" can mean a large drop in delta.
Illustrative example: on a $1 chain, adjacent near-the-money call deltas might read something like 0.55, 0.50 and 0.45. On a $5 chain for a similar underlying, the strikes either side of the money might read closer to 0.65 and 0.35. If your plan called for a delta near 0.50, the tight chain gives you that. The wide chain makes you choose between a position that is noticeably more sensitive than planned and one that is noticeably less.
Premium jumps with every strike
Premium follows the same pattern. Each step away from the money takes away some intrinsic value, or some probability of finishing in the money, and the size of that step grows with the interval. A trader who says "the next strike is only a little cheaper" on a wide chain may find it is a lot cheaper, because it is much further away, and a lot less likely to pay off.
This is where many day traders fool themselves. They step one strike out for a smaller dollar risk. On a tight chain, that is fine-tuning. On a wide chain, it turns a position that tracks the underlying into a cheaper bet that needs a much bigger move, and a later breakeven, to work.
Strike spacing and spreads
For spreads, strike spacing sets the smallest building block. The narrowest vertical spread you can build is one interval wide, and its maximum value is that width times the contract multiplier. Every spread on the chain is a whole number of those blocks, so the spacing decides how finely you can tune a spread's risk.
The narrowest spread equals one interval
A vertical spread buys one strike and sells another in the same expiration. Its maximum value is the distance between the strikes, times the multiplier. Cboe's SPX specifications describe the exercise settlement amount as the difference between the settlement value and the exercise price, multiplied by $100, and standard equity and ETF options use the same 100 multiplier. So on a $1 chain, the narrowest vertical spread is worth at most $100 per contract. On a $2.50 chain it is $250, and on a $5 chain it is $500.
That number matters because it caps how small you can make one unit of a spread. If your plan risks $150 per trade, a $1-wide debit spread costing around $50 lets you trade a few contracts and land close to that number. On a $5 chain, a single one-interval spread might already cost more than your whole risk budget. Our guide to how wide a vertical spread should be covers choosing width from your risk budget; spacing decides which widths you can choose from.
Sizing comes in blocks, not dollars
Because widths come in whole intervals, spread sizing is lumpy. On a $1 chain you can build a $1, $2, $3 or $4 wide spread and add contracts one at a time, so you can get close to almost any risk target. On a $5 chain the options are $5, $10 or $15 wide, each a large step. The only way to make risk smaller is to trade fewer contracts, and you cannot go below one.
The honest admission here is that a wide chain is not always worse. It simply means fewer, larger choices. A trader with a large risk budget may not notice. A trader working inside tight daily limits will notice every time.
| Strike gap | Illustrative underlying price | Gap as % of price | Farthest the nearest strike can be | Max value of the narrowest vertical (per contract) |
|---|---|---|---|---|
| $0.50 | $40 | 1.25% | $0.25 | $50 |
| $1 | $50 | 2.0% | $0.50 | $100 |
| $1 | $200 | 0.5% | $0.50 | $100 |
| $2.50 | $100 | 2.5% | $1.25 | $250 |
| $5 | $500 | 1.0% | $2.50 | $500 |
| $5 (index points) | An index near 6,000 | under 0.1% | 2.5 points | $500 |
Illustrative comparison of strike gaps. The percentage column shows how fine a chain really is relative to its price; the last column shows the smallest spread block at a 100 multiplier, before premium and fees.
Spacing in relative terms
Dollar spacing on its own is misleading. A $5 gap sounds coarse, but on an index trading in the thousands it is a tiny fraction of the price, finer in relative terms than a $1 gap on a $50 stock. What makes a high-priced chain feel coarse is not the percentage gap; it is the dollar size of each spread block. The same chain can be fine for picking a strike near the money and coarse for sizing a spread. Keep both views in your head.
Wider spacing, fewer middle choices
Multi-leg structures such as butterflies and iron condors use several strikes, so wide spacing affects them more. A butterfly on a $5 chain cannot be narrower than $5 per wing, and an iron condor's short strikes can only sit at listed levels. When the strikes you want are not on the chain, skip the structure on that underlying rather than force it.
How to read strike spacing on a chain
To read strike spacing, open the chain for the exact expiration you plan to trade, look at the strikes nearest the current price, and note the gap and what it is as a percentage of the price. Then check whether the strikes you need are listed, quoted and liquid before you build the trade around them.
Check the expiration you will actually trade
Spacing is not one number per symbol. As the Cboe rules for SPX show, far-dated expirations can carry wider intervals than near-term ones, and weekly series can follow their own rules. A trader who studies a monthly chain and then trades a weekly one, or the other way around, may find the strikes are not where they expected. Always read the spacing on the expiration in your order ticket.
Watch where the gap changes
Some chains change their interval across the price range, such as the $200 threshold in the XSP specifications. If your plan uses a strike well away from the money, read that part of the chain too.
Listed is not the same as liquid
A strike being listed does not mean it trades well. Round-number strikes often attract more volume and open interest than the odd strikes between them, and a tight chain can still have strikes with wide bid-ask spreads and little activity. Our guide to open interest and options liquidity explains how to tell a strike you can get in and out of from one that only looks available. Fine spacing is only useful if the strike you pick has a fair quote.
- I am looking at the exact expiration I plan to trade.
- I know the gap between the strikes nearest the money, in dollars and as a percentage of the price.
- I know how far my nearest strike is from the current price, and whether it is in or out of the money.
- I have compared delta and premium on the strikes either side of my choice.
- I know the narrowest spread this chain allows and its maximum value per contract.
- The strike I want has a reasonable bid-ask spread and some volume or open interest.
- One contract at this strike, or one spread at this width, fits my per-trade risk.
Strike spacing in a TradeFundrr funded account
In a TradeFundrr funded account, strike spacing matters because it decides whether the smallest position you can build fits inside the account's published loss limits. The accounts are simulated, but the chain, the strikes and the quotes come from live market data, so the spacing you see is the spacing you have to work with.
Fit the building block to the loss limits
The options Pre-Prop evaluation gives you $25,000 in simulated buying power. It has a $1,000 daily loss limit, and reaching it pauses trading for the rest of the session; the limit resets the next trading day. It also has a $3,000 maximum drawdown that trails your highest end-of-day balance, and reaching it closes the account. To pass, you need five profitable days of at least $250 net each, with no time limit.
Those numbers make spacing a sizing question. If your rule is to risk no more than a few hundred dollars on any one trade, a $5-wide spread with a maximum loss of several hundred dollars per contract leaves almost no room to scale, and two or three of them can reach the daily limit on their own. A $1-wide spread on a similar idea lets you size in much smaller steps. Choose the chain and width that let you stay inside your plan, not the one that makes the trade look exciting.
The platform and the contract limit
The options accounts list calls and puts on liquid U.S. underlyings, including index options such as SPX and ETF options on SPY, QQQ and IWM, plus single names. Outright long calls and puts, spreads, iron condors and butterflies are supported, and trading is manual and intraday. If you want to trade a product not named on the account page, confirm that your platform lists it before you plan around it.
There is also a cap on how many contracts you can trade, which differs by program and account size; confirm the current number in your own account terms. Spacing sets the size of each block, and the cap limits how many you can stack.
Assignment and exercise are live-market events
On a live account, a short strike that finishes in the money can be assigned, and an index option like SPX settles in cash at expiration, as the Cboe specifications describe. In a TradeFundrr simulated account, no real trade is executed, so no counterparty exercises against you and no shares or cash change hands between real parties. Positions are also intraday, so they are closed before expiration. We still think it is worth understanding exercise and settlement, because they are part of how spreads behave on a live account, and the simulated account is where you build habits that hold up later.
Payouts and what is real
Pre-Prop and Prop accounts are simulated. The fees you pay are real, and on a Prop account payouts are real money paid by TradeFundrr from its own funds when you meet the written payout rules. Payout eligibility on the options Prop account includes five sessions of $250 or more and a 30% consistency rule. None of it is guaranteed, and only a rule you broke stops a payout you have qualified for.
Frequently Asked Questions
What is option strike spacing?
Option strike spacing is the dollar gap between consecutive listed strike prices for the same underlying and expiration, such as $1, $2.50 or $5. It is set by the exchange's listing rules, and it controls how close to the current price you can get and how finely you can size a spread.
Who decides the strike intervals on an options chain?
The listing exchange decides, under its published rules. Cboe, for example, lists SPX strikes at five-point intervals with wider intervals for far months, and adds new strikes as the index moves. Traders choose from the strikes listed; they cannot create their own.
Why do some options have $1 strikes and others $5 strikes?
Each product follows its own listing program, and spacing often depends on the price level of the strike and the expiration. Heavily traded names and near-term series often carry tighter strikes near the money. The only reliable answer for a given trade is the chain you are looking at.
Is tighter strike spacing always better?
Not always. Tighter spacing gives you more precise strike choices and smaller spread blocks, but a tight chain can still have illiquid strikes with wide bid-ask spreads. Compare spacing as a percentage of price and check the quote on the strike you actually want.
How does strike spacing affect a vertical spread?
The narrowest vertical spread you can build is one interval wide, and its maximum value is the interval times the multiplier: $100 per contract on a $1 chain and $500 on a $5 chain. Every other width is a whole number of intervals, so spacing sets how finely you can size.
Can I trade spreads on wide-strike chains in a TradeFundrr funded account?
Spreads, iron condors and butterflies are supported in the options accounts, on listed underlyings including SPX, SPY, QQQ and IWM. Whether a wide-strike spread fits depends on your size: one block must fit inside the $1,000 daily loss limit with room to spare.
How should strike spacing change my position size in a TradeFundrr account?
Size from the smallest block up. Work out the maximum loss of one contract or one spread at the chain's interval, then check it against your per-trade risk, the $1,000 daily loss limit and the $3,000 trailing drawdown. If one block is too large, choose a finer chain or skip the trade.
Does a TradeFundrr funded account trade real money?
No. Pre-Prop and Prop accounts are simulated, and no real trade is executed. The chain and quotes come from live market data. Payouts on a Prop account are real money paid by TradeFundrr from its own funds when you meet the written payout rules.
Practice reading the chain in a simulated options account
TradeFundrr's options Pre-Prop evaluation gives you $25,000 in simulated buying power, a published $1,000 daily loss limit and $3,000 trailing drawdown, and no time limit, so you can learn how strike spacing changes your risk before anything is on the line.
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