Long Call

A single bought call: the loss is capped at the premium paid, and the gain grows as the underlying rises above the strike.

Also called Bought call, Call

Outlook

Bullish

Family

Basic

Level

Novice

Legs

1 leg

Expirations

1 expiration

Opens for

Debit

Maximum profit

Unlimited

Maximum loss

Limited

Legs at the reference strikes this page's diagrams are drawn from

Leg	Side	Contract	Ratio	How the strike is chosen
A	Long	Call 100	1	At the money

What it is

One call option bought and held. It gives the right, not the obligation, to buy 100 shares at strike A until the contract expires. The price paid for it is the premium, and it is the entire amount at risk: nothing that happens to the underlying can cost more than what was paid on the day the position opened.

Above A, each dollar the underlying gains adds a dollar per share to the option’s intrinsic value. Below it, the contract expires without value and the premium is gone.

The single most common misreading of this structure is treating it as a cheaper way to own shares. It is not the same trade. Shares have no expiry and no time decay; a call has both, and a view that turns out to be right three weeks after expiration pays nothing at all.

The payoff

At expiration

At expiration the position loses the premium at every price below strike A, then rises in a straight line above it with no upper limit.

The line is flat and negative below A — the whole premium, whatever the underlying does down there — and turns upward at the strike, one for one with the underlying beyond it.

Break-even is not the strike. It is the strike plus the premium paid: the underlying has to clear A and then cover the cost before the position is worth more than it cost. A call that finishes between the strike and break-even expires with real value and still loses money.

How it behaves before expiration

Today, before expiration

Today's value is a smooth curve sitting above the expiration line everywhere, closest to it far from the strike and furthest above it near the strike.

The dashed curve is what the position is worth today. It sits above the straight line everywhere, and the gap between them is time value: the amount a buyer will pay for the possibility that the underlying moves before expiry.

That gap is widest near the strike, where the outcome is least settled, and narrowest far from it in either direction, where it is nearly decided. As expiration approaches the curve falls onto the line — not evenly, but fastest where the two are furthest apart.

This is why a long call can be right about direction and still lose: the underlying rises, but not as fast as the time value drains.

The Greeks

Delta is positive and between 0 and 1. It is roughly how many shares the position behaves like — a 0.40 delta call gains about 40 cents when the underlying gains a dollar. It rises toward 1 as the option goes deeper in the money and falls toward 0 as it goes further out.

Gamma is positive and largest near the strike. It is the rate delta itself changes, which is why a call near the money accelerates: a favourable move makes the next favourable move worth more.

Theta is negative — the position loses value as time passes, every day, whether or not the underlying moves. It is the cost of the optionality, paid continuously.

Vega is positive. A rise in implied volatility raises the price of the option even with the underlying unchanged, because a wider distribution of outcomes makes the right to buy more valuable.

Where it lives in the volatility environment

Practitioners generally describe a long call as a long volatility position: it is bought with premium, so it benefits when implied volatility rises and suffers when it falls. Buying one when implied volatility is already elevated means paying for a wide distribution that may narrow, and the resulting fall in vega can offset a correct directional call.

That is a description of how the position responds to a market variable, not a rule about when to use it.

What can go wrong

• Time runs out. The most common outcome for an out-of-the-money call is expiring worthless. Being right late is the same as being wrong.
• Volatility collapses. A drop in implied volatility after entry lowers the option’s price directly. Around a known event, the drop that follows it is frequently larger than the move the event produced.
• The break-even is missed. Finishing above the strike is not enough; the premium has to be covered too.
• Early exercise is rarely the answer. Exercising throws away the remaining time value. Selling the contract almost always realises more than exercising it, except immediately before a dividend on a deep in-the-money call.
• Assignment does not apply. A long call carries no assignment risk: the holder chooses. It is the short side that can be assigned.

Building it in Option Panel

Open a trade’s Build Strategy panel and pick Long Call. The builder seeds one long call leg and offers the strike by delta, by percentage or points from the price, by an offset from the underlying, or by an exact strike; the expiration is set as a fixed date or as days to expiration.

Every resolved leg states how it was chosen and how far the listed strike sits from what was asked for, so the structure that reaches the trade is the one that was intended rather than the nearest thing to it.

Back to the encyclopaedia · What-if analysis in the docs

Related strategies

• Bull Call Spread — the same directional view with the cost reduced by selling a higher strike, at the price of a ceiling on the gain.
• Short Put — the other bullish primitive, entered for a credit rather than a debit, with the risk profile reversed.
• Long Put — the mirror image, for a bearish view.