Round Lot Jump to the manual 100 shares = 1 lot

Covered calls: the cover, the upside given away and assignment

A covered call is two positions at once: 100 shares you already hold, and a call you have sold against them. The shares are what make it covered. What you sold is the right to take them from you at a price you named.

Written under the standing byline J. Marchetti options and execution Published

Shares required
100 per contract
Maximum gain
strike + premium
Downside
unchanged
A blank engraved certificate lying face down under a small brass weight, its border lathe-work catching light along one edge
The shares stay in the account until assignment. What has left the account is the right to their upside above the strike.

What covers the obligation

Selling a call obliges you to deliver 100 shares at the strike if the holder exercises. If you already own those 100 shares, the obligation can always be met from the account, and the position is called covered. If you do not, the same sale is an uncovered call, which is a different instrument in every practical sense and sits several approval tiers higher for that reason.

The shares behave exactly as they did before. They still pay dividends, still carry a vote, still fall in value if the price drops. Selling the call changed none of that. What it changed is the ceiling.

The upside you sold

Above the strike, the shares no longer belong to you economically. Every dollar the price climbs past the strike is a dollar the call holder gains and you do not, because they can buy at the strike whenever they choose. Your maximum outcome is fixed at the strike plus the premium you received, however far the share runs.

This is the trade in one sentence: a known, immediate premium in exchange for the unknown, unlimited part of the upside. It is a perfectly reasonable exchange, and it is also the exact reason a covered call cannot be described as a way of holding shares with less risk. The risk that remains is the entire downside.

40 45 50 55 60 65 70 -15 -10 -5 0 +5 break-even 57 strike 55 profit / loss per share (USD) share price at expiry (USD)
The sold call alone, struck at 55 for a premium of 2: capped gain of 2, break-even at 57, losses beyond. Combined with 100 held shares, the total position is capped at the strike plus the premium.

What assignment does

If the call is exercised, the 100 shares leave the account at the strike and the cash arrives. The position closes itself. If the shares had risen well past the strike, that sale happens at a price now clearly below the market. Nothing went wrong; that price was agreed when the call was sold.

Assignment also has consequences the option arithmetic does not show. A sale is a taxable event whose treatment depends on how long the shares were held. If the shares were bought at a higher price than the strike, assignment realizes a loss on them that the premium may not cover. Anyone selling calls against a long-held position should know which of those applies before the call is written, not after.

The dividend edge caseA call holder who wants the dividend has an incentive to exercise the day before the ex-dividend date, because exercising early captures the payment. That is the single most predictable moment for early assignment on a covered call, and it is why writing calls across a dividend date deserves a deliberate decision rather than a default.

Where the cost of the position actually sits

The premium is visible and arrives immediately, which makes it easy to treat as the whole story. The cost is invisible and arrives only in the scenario where the shares rise sharply, and it is exactly the size of that rise above the strike. A position that collects a small premium every month for a year and then misses a large move has not been profitable; it has been paid in instalments for something it gave away in one.

That is not an argument against the position. It is an argument for measuring it against the alternative of simply holding the shares, rather than against holding cash. Compared with cash, any premium looks like a gain. Compared with the shares, the premium is what was received for the ceiling.

FAQ

Questions this page raises

Do I keep the dividend on a covered call?

You keep any dividend paid while the shares are still in the account. If the call is exercised before the ex-dividend date, the shares leave first and the buyer receives it instead. This is why the day before an ex-dividend date is the most common moment for early assignment.

What if I want to keep the shares?

Then the call has to be closed by buying an identical one back, which costs whatever it now trades at, likely much more than you received if the share has risen. There is no mechanism to refuse assignment, and no right to keep the shares once the holder exercises.

Is a covered call a hedge?

No. A hedge reduces the downside; this reduces the upside. The premium provides a small cushion equal to itself, and below that the shares fall exactly as they always would. Describing it as protection overstates by a large margin what a premium of two dollars does to a fifty-dollar share.

How many shares do I need?

One hundred per contract, held in the same account. Ninety-nine is not enough, and a fractional holding cannot cover a contract at all, which is one of the practical limits of fractional share programs.

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