Strike Price Explained: How to Choose Your Locked-In Price

Picture betting a friend on how far a long-jumper will leap. The twist is that you get to draw the line yourself.

Draw the line right at the jumper's feet, where they have basically already landed, and your friend makes you pay a lot to take that easy bet. Draw it way out at a world record, and your friend takes your bet for almost nothing, because they doubt it can happen. But if the jumper somehow reaches that far line, you win big.

That line you choose is the strike price. You have used it in every example so far without picking it. Today you pick it.

You Get to Choose the Strike

You have decided Apple, trading at $200, is going up, so you want to buy a call. Your broker does not hand you one fixed option. It shows you a menu of strikes, each at a different price:

• $190 strike: $13 a share, $1,300 for the contract
• $200 strike: $5 a share, $500 for the contract
• $220 strike: $1 a share, $100 for the contract

Same stock, same month, wildly different prices. Look at the pattern: the lower the strike, the more it costs. The $190 strike is the priciest, and the far-away $220 strike is almost cheap enough to feel like a steal.

That is not random. Each price is telling you something true about the bet you are making.

The Trade-Off That Sets the Price

Here is why those prices spread out so far.

The $190 strike lets you buy Apple at $190 while it already trades at $200. That option is already worth something the moment you own it, a built-in head start. You pay up for that head start, which is why it costs the most.

The $220 strike lets you buy at $220 while Apple sits at $200. Right now that right is worthless, because nobody buys at $220 when the stock is $200. Apple has to climb more than $20 just to make it matter. You are paying a little for a long shot, so it costs the least.

Now watch what that means when the trade plays out. Say Apple climbs, but only to $215:

• The $190 call is now worth $25 a share. A solid win.
• The $200 call is worth $15 a share. Also a win.
• The $220 call is worthless. Apple never reached $220, so it expires at zero, and you lose the whole $100.

But say Apple really runs, all the way to $230:

• The $190 call is worth $40 a share, turning $1,300 into $4,000.
• The $200 call is worth $30 a share, turning $500 into $3,000.
• The $220 call is worth $10 a share, turning $100 into $1,000. That is your money multiplied by ten, the biggest jump of the three.

So the cheap far strike is both the most likely to expire worthless and the one with the wildest payoff if the move is big enough. That is the whole trade-off in one line: a cheaper strike costs less but needs a bigger move, while a pricier strike costs more but pays off more easily.

Puts Just Flip It

Everything above was a call, a bet that Apple goes up. Now flip the bet. You think Apple is heading down, so this time you want a put, the right to sell at your locked-in price. The same menu of strikes appears, and the whole thing mirrors, exactly as you would expect from Lesson 4.

With a call, the low strike was the valuable one, because buying cheap is good. With a put it is the opposite: the higher strike is the valuable one, because selling high is good. Selling at $210 beats selling at $180. So the menu flips over:

• $210 strike: $13 a share, $1,300 for the contract
• $200 strike: $5 a share, $500 for the contract
• $180 strike: $1 a share, $100 for the contract

Same pattern as the calls, just turned over: now the higher the strike, the more it costs.

Here is why. The $210 put lets you sell Apple at $210 while it still trades at $200. That right is already worth something the moment you own it, a built-in head start of $10 a share, so you pay up for it. The $180 put lets you sell at $180 while Apple sits at $200. Right now that is worthless, because nobody sells at $180 when the market pays $200. Apple has to fall more than $20 just to make it matter, so it is the cheap long shot.

Now watch the numbers when the trade plays out. Say Apple slips, but only to $185:

• The $210 put is now worth $25 a share. A solid win.
• The $200 put is worth $15 a share. Also a win.
• The $180 put is worthless. Apple never fell to $180, so it expires at zero, and you lose the whole $100.

But say Apple really drops, all the way to $170:

• The $210 put is worth $40 a share, turning $1,300 into $4,000.
• The $200 put is worth $30 a share, turning $500 into $3,000.
• The $180 put is worth $10 a share, turning $100 into $1,000. That is your money multiplied by ten, the biggest jump of the three.

It is the same story as the calls, only pointed down: the cheap far strike most often expires worthless, yet has the wildest payoff when the drop is big enough.

So the strike logic is really one idea you can carry into either kind of trade. The strike closer to a winning price costs more; the strike further away is the cheap long shot. For a call, that winning side is lower. For a put, it is higher.

So Which Strike Should a Beginner Pick?

With a whole menu in front of you, the cheap far-away strike is tempting. It is the one that looks like the lottery ticket, a tiny cost for a giant payoff. Be careful there.

A strike at or near the current stock price is the sensible starting place. It costs more than the long shot, but it pays off on a normal-sized move instead of needing a small miracle. You are buying a reasonable bet, not a lottery ticket.

When I was advising clients, the far-out cheap strikes were the ones beginners reached for again and again, because the low price felt safe. It was the opposite. Those were the options that most often expired at zero, while a strike near the stock price would have paid off on the very same move. Cheap to buy is not the same as easy to win, and we will come back to that bargain trap in the common mistakes lesson near the end of this course.

One more note before we move on. You may have noticed the $190 strike was already worth something while the $220 strike was worthless from the start. Those have names, in the money and out of the money, and they get their own full lesson soon. For now, the menu and the trade-off are all you need.

Bottom Line

The strike is the price you lock in, and you choose it. Pick one and you are choosing your whole bet: a lower strike for a call costs more but pays off more easily, and a higher strike costs less but demands a bigger move. Puts flip it, but the logic holds.

The bargain that looks too good, the cheap far-away strike, is usually the long shot that expires worthless. Near the stock price is the steadier place for a beginner to stand.

Next up: Expiration Dates. You have picked your price. Now you pick your deadline, and time turns out to carry a price tag of its own.