How to Choose a Strike Price and Expiration from the Chain
Reviewed by Leon Moyer - Published October 9, 2026 - Last reviewed October 9, 2026
In this lesson
Turn a simple view of a stock into a strike and an expiration, by comparing cost, break-even and outcomes across the chain.
To choose a strike and an expiration from the options chain, start from your view of the stock: how far you expect it to move, and by when. The expiration should give that move time to happen, and the strike should balance what the option costs against how far the stock must travel before you break even.
There is no single correct contract for a view. There is a set of trade-offs, and the chain gives you the numbers to compare them. This lesson walks through them on the same hypothetical XYZ chain used throughout the module. The examples show a way to think about the choice, not a recommendation to make any trade.
What should your view of the stock include?
Before looking at strikes, write your view as one sentence with three parts:
- Direction: up or down. A rise points to calls, a fall to puts, as covered in Call Options Explained and Put Options Explained.
- Size: roughly how far. "XYZ goes to about $54" is far more useful than "XYZ goes up".
- Time: by when. "Within the next month" tells you which expirations make sense.
For this lesson, the view is: XYZ, now $50.40, rises to about $54 within the next month. That points to calls, at an expiration a little beyond a month out, with the 35-day expiration as one illustrative starting point to compare.
How do you choose a strike price?
On the 35-day chain, compare three calls: one in the money (48), one near the money (50) and one out of the money (52). Use the ask as a buying reference, assuming a fill there; actual execution can differ. All outcomes below exclude fees.
Each strike gives the same basic trade-off. A lower strike costs more but has a lower break-even at expiration. A higher strike is cheaper, but the stock has to rise further to have intrinsic value at expiration, and it is more likely to expire worthless.
Worked example
Comparing three XYZ calls for a move to $54
XYZ trades at $50.40. Each line is one 35-day call bought at the ask, with profit or loss at expiration. Reaching $54 earlier can produce a different resale value because time value remains.
Read across the rows:
- If the view is right and XYZ reaches $54, the 48 call makes the most dollars, $250, but it also cost the most. As a return on what was paid, the 50 call does slightly better: $175 on $225 is about 78%, against about 71% for the 48 call and about 48% for the 52 call.
- If XYZ does not move, the 52 call loses everything, while the 48 call keeps its $2.40 of intrinsic value and loses only $110.
- If XYZ overshoots to $56, the cheap 52 call earns the most per dollar paid, about 196%.
At expiration prices between $48 and $52, lower-strike calls can retain intrinsic value while higher-strike calls may expire worthless. But the 48 call costs more upfront and can still lose its full $350 premium. For a move to about $54, the 50 call's break-even of $52.25 leaves some room for the stock to fall short of the target. The OIC suggests comparing returns across strikes and possible stock prices.
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.
Three XYZ calls from the same chain
48 call (in the money)
Costs $350 at the $3.50 ask
Break-even $51.50
50 call (near the money)
Costs $225 at the $2.25 ask
Break-even $52.25
52 call (out of the money)
Costs $135 at the $1.35 ask
Break-even $53.35
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.
How do you choose an expiration date?
An expiration has to give the move time to happen. If your view is "within a month" and you buy an option with two weeks left, the stock can be right on schedule and the option can still expire before it arrives.
In this hypothetical chain, more time costs more to buy. Here is the same 50 call on three expiration tabs. With XYZ at $50.40, each call has $0.40 of intrinsic value. The mark is shown to illustrate time value; use the ask as the quoted buying reference, subject to price and size changes.
The midpoint is not a guaranteed fill. Nor can these three prices tell you how much the premium will lose tomorrow: time decay is not linear, and stock moves and volatility changes also affect it. See OIC on theta. What Is Theta in Options? covers theta, and Intrinsic and Extrinsic Value explains time value.
The same 50 call at three expirations
Premium for one contract, at the mark
Time value in that premium
One approach some option buyers take is to choose an expiration comfortably beyond the date they expect the move, to allow more time for the thesis, at a higher upfront cost. This does not ensure a profit or a favorable resale price. For the XYZ view, the 35-day expiration gives the one-month idea a few days of room; the 63-day expiration gives a lot more, for $70 more per contract.
What should you check before you trade the contract?
Once you have a strike and an expiration, look at that one row again:
- Is the spread reasonable against the mark? The 50 call's $0.10 on $2.20 is. Bid, Ask and the Spread shows how to check.
- Does it trade? Volume and open interest provide context; check current quotes and size, since an exit is not guaranteed. Volume and Open Interest covers what to look for.
- What is the most you can lose? For a bought call, it is the premium: $225 for the 50 call. Be sure that is an amount you are prepared to lose in full.
Check your understanding
Using the XYZ chain, what is the break-even at expiration of the 52 call bought at its $1.35 ask?
Show answer
$53.35: the $52 strike plus the $1.35 premium.
If XYZ is still at $50.40 at expiration, why does the 48 call lose less than the 52 call?
Show answer
The 48 call is in the money by $2.40, so it is still worth $240 at expiration and loses $350 - $240 = $110. The 52 call is out of the money, expires worthless and loses its full $135.
The 63-day 50 call has a higher ask than the 35-day one. Can these quotes tell you how much either premium will lose tomorrow?
Show answer
No. The longer call costs $295 at its quoted ask versus $225 for the 35-day call, but time decay is not linear. Stock and volatility changes can also move both prices.
Key takeaways
- Start from a view with a direction, a size and a time frame; the chain can only answer a specific question.
- Lower call strikes cost more and have lower expiration break-evens; higher strikes are cheaper, need a bigger move and expire worthless more often.
- Longer expirations leave more time for a move and generally cost more; current quotes do not forecast daily decay or a future sale price.
- Before trading, check the chosen row's spread and activity, and confirm you can accept losing the full premium.
Common questions
How do I choose a strike price for an option?
Start from how far you expect the stock to move. Compare a few strikes by what they cost and where they break even: lower call strikes cost more but have lower expiration break-evens, and higher strikes are cheaper but need a bigger move. The right one is the strike whose trade-off fits your view.
Is it better to buy options in the money or out of the money?
Neither is better in general. In-the-money options cost more and need a smaller move to profit; out-of-the-money options cost less and can return more on a large move, but expire worthless more often. The choice depends on how big a move you expect and how much you are willing to lose.
How far out should I buy an option?
Far enough to give your idea time to play out, with some room to spare. Longer-dated options generally cost more. Actual daily decay depends on moneyness and volatility; dividing time value by days remaining does not measure theta.
What is the best strike price for a call option?
There is no single best strike. A call's strike sets how much you pay and how far the stock must rise to break even, so the best strike for one trader's view can be the wrong one for another's. Compare two or three strikes before choosing.