How to Pick a Strike Price and Expiration
Written by the MarketWrench team. Examples are worked with the same Black-Scholes model used in our calculators (4% rate, no dividends unless stated) and are reviewed for accuracy before publishing. How we create content.
Picking the strategy is only half the decision. The strike and expiration you choose decide how much you pay, how likely you are to profit, and how much room the trade has to work. There is no perfect choice, only trade-offs. This guide lays them out.
Step 1: state your view precisely
"I think XYZ goes up" isn't enough. Ask: how far, by when, and how confident am I? A view like "XYZ is likely to be between $95 and $110 over the next six weeks" points directly to strikes and an expiration. The expected move calculator shows what range the market is already pricing in, so you can compare your view with it.
Step 2: choose the expiration
- Give buyers time. Long options lose value fastest in the last month (see theta). Many buyers pick 60–120 days and plan to exit well before the end.
- Sellers often use 30–45 days. Decay is meaningful but not yet frantic, and there is time to adjust.
- Mind the calendar. If earnings fall before expiration, IV will usually be higher and can drop sharply afterward. Decide on purpose whether you want that event inside your trade.
- Longer isn't free. More time costs more premium, and long-dated options may have wider spreads.
Step 3: choose the strike
Strikes trade off probability against payoff.
| In the money | At the money | Out of the money | |
|---|---|---|---|
| Cost (buyer) | Highest | Medium | Lowest |
| Chance of finishing ITM | Highest | About 50% | Lowest |
| Extrinsic value | Low | Highest | All of it |
| Behaves like | The stock | Balanced | A lottery ticket |
Delta is a handy guide. A 0.30-delta call moves about $0.30 per $1 in the stock, and traders often read delta as a rough estimate of the chance the option finishes in the money. It is a rule of thumb, not an exact probability.
Worked example: three ways to be bullish HYPOTHETICAL
XYZ is at $100, 30 days, IV 30%. You expect a rise to about $108.
| Choice | Cost | Delta | P/L if $108 at expiration | P/L if $100 |
|---|---|---|---|---|
| Buy $95 call | $665 | 0.75 | +$635 | −$165 |
| Buy $100 call | $359 | 0.53 | +$441 | −$359 |
| Buy $110 call | $66 | 0.15 | −$66 | −$66 |
The cheap $110 call loses everything even though your forecast was mostly right. The ITM $95 call makes the most here and loses least if the stock stalls, but ties up the most cash. Model your own version in the options profit calculator.
Step 4: check liquidity
Look at the bid-ask spread and open interest before committing. Strikes near the money and standard monthly expirations usually trade most. A spread of $0.50 on a $2.00 option costs you 25% just to get in and out. Our options chain guide shows where to look.
Step 5: size it and plan the exit
Decide your max loss in dollars first, then how many contracts fit (the position sizing and risk/reward tools help). Set a profit target, a loss limit and a time limit, such as "close with 21 days left," before you enter.
Strike-picking for sellers
Sellers flip the trade-off. A cash-secured put at a 0.20–0.30 delta collects less premium than one at the money, but is less likely to be assigned. Pick a strike where you'd genuinely be happy to own the shares. For credit spreads, the distance between strikes sets the max loss.
FAQ
Is there a best delta to use?
No. Higher delta means a higher chance of profit but a higher cost or lower reward. Match it to your view and risk.
Should I avoid weekly options?
Not necessarily, but they decay very fast and leave little room for error, which makes them hard for beginners.
Why are far OTM options so cheap?
Because the market sees a small chance they finish in the money.
Not financial advice
This page is for educational and informational purposes only. It is not financial, investment, tax, or legal advice, and it is not a recommendation to buy or sell any security or to use any strategy. All examples use hypothetical numbers. Options involve risk and are not suitable for everyone. Do your own research and consider talking to a licensed professional before trading.
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