Pairs Trading with Options - Betting on One Name Beating Another
Reviewed by Leon Moyer - Published October 9, 2026 - Last reviewed October 9, 2026
In this lesson
Build a defined-risk pair from a long call on a stock and a long put on its sector ETF, size it so both sides control the same dollars, and work out what it makes or loses in different scenarios.
A pairs trade is a relative-value bet: you take a bullish position on one asset and a bearish position on a closely related one, so that you profit if the first does better than the second, whichever way the market goes. With options, the classic version is buying calls on the name you expect to lead and puts on the one you expect to lag.
New setup for this lesson: XYZ is a hypothetical chipmaker trading at $50, not the $100 used in Sector ETF Options, and ABC is a sector ETF of chipmakers that includes XYZ, trading at $100.
How does pairs trading work?
Suppose you think XYZ is better run than its rivals and will outperform the chip sector over the next six weeks. You do not have a strong view on whether chips as a group go up or down.
A plain call on XYZ would be a bet on XYZ and on the sector, since a sector sell-off would likely drag XYZ down too. A pair removes some of that sector bet by adding the opposite view on ABC. The classic share version buys XYZ and sells short an equal dollar amount of ABC. If both fall, the short gains offset the long losses, and what is left is roughly the difference in performance.
Short selling has its own risks: a short position can lose without limit if the price keeps rising, and it needs a margin account. Options offer a version with a known worst case.
How do you build a pairs trade with options?
Replace each side with a long option:
- Bullish leg: buy calls on XYZ, the name you expect to lead.
- Bearish leg: buy puts on ABC, the one you expect to lag.
Because you only buy options, the most you can lose is the total premium paid. Neither leg can lose more than its cost.
How do you size the two sides of a pair?
Match the dollars each side controls, not the number of contracts. One contract covers 100 shares, so a $50 stock and a $100 fund need different contract counts.
Matching the dollars on each side of a pair
Shares controlled, in dollars
Two XYZ contracts control 2 x $50 x 100 = $10,000 of stock, the same as one ABC contract at 1 x $100 x 100. Equal dollars is the simplest rule. Some traders also scale one side by how much more that name usually moves than the other. Hedging Sector Exposure with ETF Puts uses the same idea, called beta, to size a hedge against a fund; like any estimate from past prices, it can drift.
Worked example
A stock-versus-sector pair with options, 45 days out
Using model prices from the same engine the OptionsPro calculator uses:
- Buy 2 XYZ 50 calls at $2.58 (35% implied volatility): $516.
- Buy 1 ABC 100 put at $2.53 (20% implied volatility): $253.
- Total cost: $769.
At expiration, before fees:
- Maximum loss: the $769 paid, if XYZ finishes at or below $50 and ABC at or above $100.
- Maximum profit: unlimited, because the XYZ calls keep gaining as XYZ rises.
- Break-even: there is no single break-even price; the pair breaks even whenever the two legs together are worth the $769 paid.
Illustrative and hypothetical. The ticker and prices are invented for teaching, and the figures exclude commissions, fees, margin interest and taxes, which reduce real results. Past or hypothetical outcomes do not indicate future results.
The two legs of the pair, each on its own underlying
Long 2 XYZ 50 calls
Costs $516
Gains above $52.58
Long 1 ABC 100 put
Costs $253
Gains below $97.47
Gray line: zero, where the position breaks even. Dashed line: strike. Each sketch shows profit or loss at expiration as the stock price rises from left to right.
What does an options pair really pay for?
Here is the pair at expiration in five scenarios:
The pair at expiration in five scenarios
Pair profit or loss at expiration
- XYZ leads (XYZ up 15% to $57.50, ABC up 10% to $110): the calls make $984, the put loses $253, +$731. This is the outcome the trade was built for.
- Both up 10% (XYZ $55, ABC $110): the calls make $484, the put loses $253, +$231.
- Both down 10% (XYZ $45, ABC $90): the calls lose $516, the put makes $747, +$231.
- Both flat: both legs expire worthless, -$769.
- XYZ lags (XYZ down 10%, ABC up 5%): both legs expire worthless, -$769.
Two lessons hide in that list. First, the pair made money when XYZ did no better than the sector, as long as both moved 10%. Second, it lost everything when nothing moved. A pair of long options is not a pure relative-value bet. Each leg is a long option, so the position also profits from big moves in either direction and suffers from time decay when prices sit still.
Also notice that on the way down, XYZ's relative strength is not rewarded. If ABC falls 10% while XYZ falls only 5%, the result is the same +$231 as when both fall 10%, because the XYZ calls expire worthless either way.
What are the risks of pairs trading with options?
- The relationship can break. The name you expected to lead can lag for reasons you did not foresee, such as a product delay or a guidance cut. In this example, that costs the full $769.
- Time decay hits both legs. Both options lose time value every day the prices do not move, so a correct relative view that plays out slowly can still lose.
- Company news on the stock leg. XYZ's own earnings report can move it far more than the sector. Trading around single-stock earnings is covered in Earnings and Event Strategies in the Advanced Strategies course.
- Overlap. XYZ is inside ABC. If it is one of the fund's largest holdings, the two move together more, and the gap you are betting on is smaller.
Check your understanding
XYZ trades at $50 and ABC at $100. How many XYZ contracts match the dollars controlled by one ABC contract?
Show answer
Two. Two XYZ contracts control 2 x $50 x 100 = $10,000, the same as one ABC contract at 1 x $100 x 100.
You buy 2 XYZ 50 calls for $2.58 and 1 ABC 100 put for $2.53. What is the most you can lose?
Show answer
The $769 paid in total: $516 for the calls plus $253 for the put. Both legs are long options, so neither can lose more than its cost.
Why did the pair make money when XYZ and ABC both fell 10%, even though XYZ did not outperform?
Show answer
Because the long ABC put gained $747 while the XYZ calls could lose only their $516 cost. A pair of long options profits from large moves, not only from the gap between the two names.
Key takeaways
- A pairs trade bets on one name doing better than a related one, rather than on the market's direction.
- With options, buy calls on the expected leader and puts on the expected laggard; the worst case is the total premium paid.
- Size by dollars controlled, not contracts: here 2 XYZ contracts at $50 match 1 ABC contract at $100.
- A long-option pair also profits from big moves and loses to time decay when prices sit still, so it is not market neutral.
Common questions
What is pairs trading?
Pairs trading is a relative-value strategy: you buy one asset and sell, or bet against, a related one, aiming to profit from the gap between them rather than from the market's direction. A classic pair is two companies in the same industry, or a stock and its sector fund.
Can you do pairs trading with options?
Yes. Instead of buying one stock and shorting the other, you can buy calls on the one you expect to do better and puts on the one you expect to do worse. Your worst case is then the premiums paid, but time decay works against both sides.
Is pairs trading market neutral?
Not exactly. A share-based pair sized to equal dollars is close to neutral to a broad market move, but it still carries the risk that the relationship between the two breaks down. A pair built from long options is not neutral at all: it also profits from big moves and loses when nothing moves.
What is the risk of a pairs trade?
The main risk is that the relationship breaks: the name you expected to lead lags instead. With shares, a short leg can lose without limit. With long options, the loss is capped at the premiums paid, but you can lose all of it if the moves are too small.