Strike Price
The strike price is the locked-in price at which an option lets you buy or sell a stock. Learn how to choose one and why it decides whether your option pays off.
The strike price is the locked-in price at which an option lets you buy or sell the stock. For a call, it is the price you can buy at. For a put, it is the price you can sell at. It stays fixed for the entire life of the contract, no matter what the stock does.
The strike is the single most important choice you make when picking an option, because it decides how much the stock has to move before you profit. Let me make it concrete.
The Price You Lock In
Imagine you spot a jacket you love, but you are not ready to buy today. The shop offers you a deal: for a small fee, they will let you buy that jacket for $100 anytime this month, no matter what the tag says later.
That $100 is your strike price. It is locked. If the jacket goes on a hot streak and the price jumps to $160, you still get it for $100. If it goes on clearance for $60, you just skip your deal and buy it off the rack instead.
An option's strike works exactly the same way. It is the price you nailed down in advance, and the whole trade revolves around where the stock ends up compared to it.
Choosing Your Strike
When you buy an option, the exchange offers a whole menu of strikes, and your choice sets the trade-off between cost and probability.
A strike close to the stock price is more expensive, because the stock barely has to move to make it pay. It is the likelier winner, but you pay up for that.
A strike far from the stock price is cheap, because the stock has to travel a long way to get there. It is a long shot: low cost, low odds.
Take Apple at $200. A $200 call is right at the money and reasonably priced. A $190 call is already in the money and costs more, since it has real value baked in. A $230 call is out of the money, cheap, but Apple has to rally hard to make it worth anything.
Why the Strike Decides Everything
The strike is the finish line your stock is running toward. It sets your breakeven, your odds, and the whole shape of the payoff.
Pick a strike near the money and you have a solid, pricier bet with good odds. Pick one far away and you have a cheap lottery ticket. Neither is right or wrong. The strike is simply the dial you turn to match the trade to how confident you are and how much you want to risk.
- The strike is the locked-in price to buy (call) or sell (put) the stock.
- It stays fixed for the entire life of the contract.
- Strikes near the stock price cost more but are likelier to pay.
- Strikes far away are cheap long shots.
Pop Quiz
Three quick questions to see what stuck. Pick an answer and the explanation shows up right away.
What is the strike price?
The strike is the fixed price the option lets you transact at. The price of the option itself is the premium.
Apple is at $200. Which call is cheapest?
A far-away strike is cheap because the stock must travel a long way to reach it. Low cost, low odds.
Does the strike price change during the life of the contract?
The strike is locked in when you choose the option and never moves, no matter what the stock does.
Bottom Line
The strike price is the price you lock in, the finish line the stock runs toward. It never moves, and it decides how far the stock has to travel before your option pays. Near-the-money strikes cost more with better odds. Far-away strikes are cheap long shots.
Choosing a strike is really choosing how confident you are and how much you want to risk. Get comfortable with that dial and you control the heart of every options trade.
Keep going: see how the strike sets your breakeven, and where it sits relative to the stock in in the money and out of the money.