How to Buy a Call Option
To buy a call option, form a view that names both how far the underlying moves and by when, choose a strike and expiry that match it, and treat the premium as money already spent. The contract expires worthless if the move does not happen in time.
A call gives the right, not the obligation, to buy the underlying at a fixed price until a fixed date. You pay for that right up front, and if the move you expected does not arrive before the date, the payment is gone.
Before you start
A view that includes a size of move and a deadline, because a call needs both. “It goes up” is not enough. “It goes up 8% within six weeks” is a view a contract can be chosen against.
The premium treated as spent the moment it is paid. That framing is accurate and it removes the pressure to rescue a losing position.
A strike and expiry chosen from that view rather than from what looks affordable. Affordability is how people end up owning contracts that need an implausible move.
The steps
1. Write the view with a number and a date
Both halves are required. Prices rarely travel far in one direction without pausing, so a view requiring a sustained move needs a window that allows for it.
2. Choose the expiry from the deadline, with room
If the view is six weeks, buy more than six weeks. The extra costs more and removes the outcome where you were right and the contract expired first.
3. Choose the strike from the expected move
A strike your expected move does not reach is a contract that needs a different view to pay. Nearer strikes cost more and require less to happen.
4. Check the contract is actually tradeable
Open interest and a reasonable spread. A contract you can buy and not sell converts every exit decision into holding to expiry, which was not the plan.
5. Size it as money you are spending
The defined loss is the entire premium, and defined is not the same as small. Size so that the whole amount disappearing changes nothing structural about the account.
6. Decide the exit before you buy
Write down the price at which you take the gain and the date at which you accept the view did not happen. Deciding either one while holding the contract is deciding it under pressure.
7. Close it rather than holding to expiry
Selling the contract captures whatever remains of both its intrinsic and time value. Holding to expiry gives up the second part and introduces assignment mechanics you did not need.
How to tell it worked
The view was written with 1 size figure and 1 date, before any contract was chosen.
The expiry sits beyond that date, so timing has slack in it.
The contract has traded on at least 1 of the last 5 days, so the position can be closed.
And both exits were written down before the purchase, one for the gain and one for the deadline.
What the premium buys
It buys time and it buys exposure, and it decays. Every day held, some of the value attributable to remaining time is gone whether or not the underlying moved. This is the mechanic that makes a long option different from a share.
On an illiquid contract the spread alone can be a large fraction of the premium. Entering and leaving costs that twice, which is a hurdle the underlying does not have to clear on a share trade.
Why cheap contracts are cheap
A strike far from the current price costs little because the market judges it unlikely. The low number is a price, not a discount, and it is set by people with better models than a chain screenshot.
Buying ten cheap contracts instead of one reasonable one changes the shape of the outcome, not the expectation. Most of them expire worthless, and the arithmetic depends on rare large wins that have to arrive within the window.
The same logic applies to very short expiries. They are cheap because there is little time for anything to happen.
What happens to the position while you hold it
Three things move the price of the contract at once. The underlying moving, time passing, and the market’s estimate of future movement changing. Only the first is the reason you bought it.
Which means the contract can lose value on a day the underlying rose. If the move was smaller than the time that elapsed was worth, or if the market repriced expected movement downward, the position is worse and your view was correct.
This is the single most confusing property of a long option, and it is not a malfunction. You bought a claim on a move of a certain size within a certain window, and a small move inside a shrinking window is worth less than a small move inside a large one.
The practical consequence is to check the underlying, not the contract. Your view was about the underlying; whether it is still intact is a question the contract’s price answers badly.
The original data
Of the 24,971 unique videos in the search study behind this site, 13 mention call options in the title, at a median of 77,171 views across 12 channels, and 54% of those titles are instruction-shaped. Puts appear in 23 at 56,794 and the chain itself in 6 at 26,420. Duplicates are removed first, so no video is counted twice.
13 videos at a 77,171 median. Very little coverage and a large audience per video, and almost none of it about the deadline — which is the half of the trade that decides most outcomes.
The question: It expires Friday and you are still right. Roll it?
The answer is that rolling is a second purchase, not an extension of the first. It needs its own view, its own strike and its own deadline — and rolling because the original was about to expire is buying a contract to avoid recording a loss.
When it fails
The failure is being right and out of time, and it does not feel like being wrong until it is over. The view was correct, the underlying moved in the direction expected, and it did so eight days after the contract expired. The premium is gone in full. Nothing in the position warned about this, because the deadline is invisible on a price chart and the contract behaves normally right up to the last week.
The second failure is buying on affordability. Cheap encodes unlikely.
A third is no written exit. Both of them get decided under pressure.
A fourth is an illiquid contract. You can enter and not leave.
A fifth is holding to expiry. The remaining time value is given away.
And a sixth is sizing as though the defined loss is a small one. It is the entire premium.
Related
Call option covers the contract itself. Strike price is the level the whole trade is defined against. And options expiry is the deadline that decides most of these outcomes.
A call is a bet on a move happening inside a window, not a bet on a move happening. You can be right about direction and still lose the whole premium, because the move arrives three weeks after the contract expires. I treat the deadline as half of the trade rather than a detail attached to it.
— Michael Whitman
This page is educational, not financial advice. Test every idea on your own charts before risking money.