The covered call

Own the shares, sell a call against them, and keep the premium.
The most widely recommended options trade there is — and the one whose cost is hardest to see.

What it is

Two positions, one trade. A hundred shares, and one call sold against them.
The shares are the cover. If the call is exercised you already own what you have to deliver.
The premium is yours to keep whatever happens next.
Your upside stops at the strike. That is what you sold.

What you are actually agreeing to

You are agreeing to sell your shares at the strike, if asked.
You keep the premium either way.
Below the strike you still own the stock, and all of its downside.
The premium is not protection. It is a small discount on a position you already had.

The trade, written out

Everything above is the idea. This is the position — the lines you would actually send to a broker.

Order ticket

Leg	Action	Qty	Expiry	DTE	Strike	Delta	Price
1	Buy shares	+100	—	—	stock	+100	$100.00
2	Sell to open	-1	16 Oct 26	45	105 Call	-0.32 (32Δ)	$1.77
Net	Debit	1 position	16 Oct 26	45	—	+0.68	$98.23

BUY +100 XYZ @ 100.00 · SELL -1 XYZ 16 OCT 26 105 CALL @ 1.77

Reading it back

The shares are bought at the market price — the ticket shows them at the spot price on the day.
The call is sold above the money.
The net is a debit, because the shares cost far more than the call pays.
That debit is the position, which is why the maximum loss is measured against the whole stock holding and not against the premium.

The argument

Bull

makes the claim

I own the stock anyway. Somebody is offering me money for the part of the upside I never expected to get. Take it, take it again next month, and let it compound against the cost of the shares.

Bear

doubts it

You have kept every dollar of the downside and sold the one thing that pays for it. One good quarter and your stock is called away at the strike while the rest of the market runs. You have swapped a lottery ticket for lunch money.

Ferret

settles it

The claim is that the premium collected beats the upside given up, over many cycles, on a real portfolio. That is a measurable claim and nobody in this argument has measured it. Name the delta, the tenor and what happens on assignment, and it can be tested.

The shape of it

The covered call on XYZ at $100 · 25% volatility · 4% rate · 45 days. Priced from the model, not written by hand.

	At expiry
Debit paid	$9,823
Maximum profit	$677
Maximum loss	$-9,822
Breakeven	$98.23

A rising line that stops. You participate up to the strike and not a cent beyond it.
Maximum profit is the rise to the strike plus the premium, and the table computes it rather than repeating a formula.
The downside is the stock’s downside, less the premium. It is not capped in any meaningful sense.
The breakeven is your cost less the premium — a small cushion, and it is worth knowing exactly how small.

Where you actually enter

The chart above is the shape at expiry. It puts the bend right next to the money, which makes the trade look like it is already on the edge. It is not — here is the day you open it.

The same structure set up at 30Δ · 45 days · credit $9,850. The shaded band is the room between the stock and the strike you sold.

The same price, two different days

	On day one	At expiry
Stock at $106 (the strike you sold)	$353	$750
Stock unchanged at $100	$0	$150

You enter at the dot, holding shares that are worth what you paid for them.
The shaded band is the upside you kept — everything between the stock and the strike you sold.
Above that band the line goes flat. Every dollar of a rally past the strike belongs to somebody else.
The day-one line and the expiry line differ most near the strike, which is exactly where the decision to roll or be assigned gets made.

Different ways to set it up

One dial that matters: how far above the money you sell the call. The tenor is the second, and the two interact in a way the panels make obvious.

Same delta, four tenors

Days	Short strike	Away from spot	Credit	Max loss	Risk : reward
7	102	-2.0%	$9,936	$-9,935	—
21	104	-4.0%	$9,900	$-9,899	—
45	106	-6.0%	$9,850	$-9,849	—
90	109	-9.0%	$9,788	$-9,787	—

Selling a week out pays little per trade and a lot per year — if you can keep doing it.
Selling three months out pays more per trade and caps you for longer.
The shaded band widens with tenor at the same delta, which is the same finding as on every other structure here: a delta is not a distance.

Same tenor, three deltas

Delta	Short strike	Away from spot	Credit	Max loss	Risk : reward
40Δ	103	-3.0%	$9,756	$-9,755	—
25Δ	107	-7.0%	$9,874	$-9,873	—
15Δ	110	-10.0%	$9,928	$-9,927	—

A high-delta call pays well and gets your stock called away often.
A low-delta call barely pays and barely caps you.
There is no free point on that line. The premium is the price of the upside, and the market is not giving either one away.

Every covered call is a decision about how much of the upside you are prepared to sell. The premium is just the receipt.

What the Greeks are doing

Four questions about the same position, and a fifth that barely applies here.
Every structure answers them differently, which is why this site never writes a general page about the Greeks.

Days left	Delta	Gamma	Theta / day	Vega	Rho
45	+67.6	-4.10	$+3.84	$-12.63	$-3.78
21	+77.2	-5.04	$+4.56	$-7.25	$-1.27
7	+91.5	-4.51	$+3.95	$-2.16	$-0.16

The position at entry — stock $100 · 25% volatility. Per contract, from the model.

Delta — which way you need the stock to go

Strongly positive — you own shares.
The short call reduces it, but nowhere near to neutral.
This is a stock position with an income overlay, and the delta column says so plainly.

Theta — what time does to you

Positive, from the call.
It is the whole reason for the overlay.
It is also small next to what the shares can do in a day, which is the honest way to read it.

Vega — what a change in fear does to you

Short volatility through the call.
A volatility spike usually comes with a falling stock, so both parts hurt at once.

Gamma — how fast your delta turns against you

Negative, and it bites as the stock approaches the strike.
Near expiry your effective share count starts swinging with every move.

Rho — what a change in interest rates does to you

Negligible at this tenor.
One row, and no more attention than that.

Theta and gamma are one thing

This is the part that decides whether the strategy works, and it is almost never put plainly.

You cannot be paid theta without being short gamma. They are not two features of the trade. They are the rent and the risk on one lease.

The same position, three points in its life

Nothing about the position changes.
The stock sits still at $100 throughout.
Only the days left move.

Days left	Delta	Gamma	Theta / day	Vega	Rho
45	+67.6	-4.10	$+3.84	$-12.63	$-3.78
21	+77.2	-5.04	$+4.56	$-7.25	$-1.27
7	+91.5	-4.51	$+3.95	$-2.16	$-0.16

Now move the stock to $104.50

Same three dates, same holding.
Now with the stock up near the call you sold — the point where the trade stops being comfortable.

Days left	Delta	Gamma	Theta / day	Vega	Rho
45	+48.2	-4.34	$+4.62	$-14.62	$-6.22
21	+50.4	-6.37	$+6.49	$-10.00	$-2.84
7	+53.9	-10.97	$+10.77	$-5.75	$-0.90

Gamma goes from -4.34 to -10.97.
Theta goes from $+4.62 a day to $+10.77.
Both climb, and neither is available without the other.
Delta now moves roughly 3 times as far for every dollar the stock travels.

Which is what DTE actually sets

Shorter calls pay more per day and cap you more often.
Longer calls pay less per day and take the decision away for longer.
The dial sets how frequently you have to decide, which for most people is the real cost of running this.

The trap

The trap here is that it is sold as a conservative strategy.

The upside is capped and the downside is not. That is the whole trade, in one sentence.

The premium looks like income because it arrives as cash.
What it actually is, is payment for the right to take your shares at the strike.
In a flat market you win. In a rally you underperform the stock you own. In a fall you lose almost exactly what a shareholder loses.
Two of those three outcomes are worse than simply holding.

Why it matters

Judging it on the premium collected alone will always make it look good.
The only honest comparison is against holding the shares and doing nothing.
That is the test we intend to run, and it is the one almost nobody publishes.

How this shows up in our tests — pending. No result has been published on this structure yet.