If you've ever bought an option, you've

probably experienced this. The stock

doesn't move right away, but your option

loses value every single day because of

theta decay. So, here's the question.

What if you could still own that long

call while reducing some of the cost of

holding it? That's exactly what we're

going to cover in this lesson. We're

going to look at two strategies that

start with buying a long call and then

selling a shorter dated call against it.

By the end of this lesson, you'll

understand what a call calendar and call

diagonal are, how they can help reduce

the cost of owning a long call, how to

manage the trade after you enter it, and

some of the most common mistakes traders

make that can turn a good trade into a

bad one. If you've ever wished there was

a better way to own a call option than

simply buying it and waiting, this

lesson will give you another way to

think about it. Let's get started.

Being right on direction isn't always

enough. Even a perfectly timed

directional call can lose money due to

the structural disadvantage baked into

long call positions. The problem is why

buying options is hard is theta decay.

Your option loses value every day, even

when the stock doesn't move. You have a

high cost for that option. Buying the

option outright requires significant

upfront capital with limited room for

error. And a larger move is required.

The stock must move enough to cover the

premium paid before expiration.

Being right on direction isn't always

enough.

So the solution is to let time work for

you. Instead of fighting theta decay,

professional traders structure positions

that harvest it. The core insight,

options with less time decay faster,

sell what decays fast, and own what

decays slow. So we're going to be buying

longerdated options and selling

shorterdated options to collect premium

to reduce our overall cost basis. To

start, let's do a quick review of what

theta decay is. Theta is not linear.

Theta is the decay of price on the

option as time passes and it accelerates

dramatically as expiration approaches.

The chart below illustrates how time

value erodess across different days to

expiration or DTE as we call it. The

closer to expiration, the steeper the

decay of the curve becomes. Calendar

spreads offer a more capital efficient

way to maintain market exposure. Like

any strategy, there are meaningful

trade-offs to understand before entering

a position. So, why would you use a

calendar spread? Well, one of the

benefits is that it lowers your cost.

Premium collected reduces your net

debit. Reduce theta exposure. The short

option offsets the long options decay.

Premium income. the short leg earns

while you hold the long and lower

capital requirement versus just buying

the actual option outright. You also

still have a defined risk structure. The

net debit that you pay is your maximum

loss. Let's go through some of the

risks. It does require active

management. It's not just a set it and

forget it, although it is pretty low

management.

Limited profit window. The price must

stay closer to your short strike. It is

volatility sensitive. So if the backmon

volatility changes, it will affect your

P&L.

You need patience. Theta works slowly at

first. And there is a rolling obligation

to this. The short leg must be managed

as expiration near. So what is a

calendar spread? This may seem

complicated, but stick with me. We'll

get to some examples. I just want to

make sure you understand the theory

behind the trade first. This works best

if a stock has already moved up and you

still want to partake in it, but you

think there's a possibility that there

could be some chop for a little while.

Your overall market outlook should be

neutral to slightly bullish. If you're

slightly bearish, it's going to hurt the

trade. If you're very bearish, it's

going to definitely avoid that trade.

And if you're very strongly bullish,

this would be a trade to avoid as well.

The trade structure is that you're going

to start by buying that long call.

That's going to be the anchor of your

position. We're then going to sell a

shorterterm call closer to expiration

that is faster theta decay to generate

premium income to reduce our cost basis.

We're doing this at the exact same

strike in different expirations.

Let's get into one of the examples

that'll be able to really hammer home

what this trade is. All right, so here

we are. We went back to February 2026.

And I wanted to pick a

equity that had a good move up and

looked like it could keep moving higher,

but we wanted to see how this would

perform with a call calendar spread. For

this example, we went with Costco. I

wanted to pick a trade that had a nice

big bull run and still showed some

positive momentum into it and see how

this calendar spread would have worked

out. So, if we look at our price chart,

Costco had a nice big bull run up,

pulled back, and now was showing some

strength again.

Let's get into the structure of the

trade. We went out and we bought the 990

puts going 98 days to expiration. Again,

we want to go longer dated on this. We

want to go 90 days plus at a minimum. Uh

that way we can make sure that that

theta decay doesn't affect the trade too

much.

And in doing so, we had to pay $5742

for the option. That equates to

$5,742.50.

What we're doing then is we're going to

go to a shorter tated option. We went 28

days. Again, 30 days in is going to be

the fastest theta decay. And we're going

to sell that option against it. For

this, we're collecting

$3,52.50.

What this does is it changes our net

debit of the trade

to $2,242.

If we look at how this trade would have

looked without this call that we sold,

you can see we would have outlaid

$5,745.

Selling that call against it reduces

your net exposure dramatically.

Now let's go to our next adjustment.

So right now we are

18 days in the trade and we have 10 days

to expiration.

What I'm looking to do is we have

reduced our exposure quite a bit on this

and now we're getting closer to

expiration. Now we have to worry about

assignment risk. We have a lot of other

factors that are going to kick in. Uh

gamma risk, which is going to be the

change of deltas in the trade, is going

to amplify. This is time to roll that

call out. And I'm going to show you how

we do that. We're going to be using the

exact same strike. We're going to buy

back this option here.

And you're going to we went out 24 days,

and we're just going to sell it again.

And watch what happens to our net

exposure in this trade. We go from

$2,242

down to $1,571.

And we keep going. We're up some good

profit now, as well as reducing our

overall exposure in the trade.

our next adjustment.

We're back down to that 10 days to

expiration

and we're up some good profit on this

trade. Let's look at what Costco's done

so far. We've gone up, we've gone down,

we've came back up. It hasn't really

done much of anything very good for this

particular style of trade. So again,

we're going to buy back

this short option and we're going to

roll this out in time.

Going to go 31 days this time.

Now look at our exposure. We've gone

from $1,579

down to $250 in the trade. [snorts]

And now let's see what the structure

looks like after we roll it.

We're widening our profit tent because

we're collecting more premium and we're

just letting time work in our favor on

this trade. This next adjustment is

really cool because it's going to show

you the power of selling that short

against the long.

So, we're going to get into our next

adjustment now

and watch what happens. Here's before

our adjustment. And again, we're 10 days

to expiration. And now we're going to

roll this out and watch. We now have a

debit in the trade of $243.50.

And when we take this 10 DTE option and

we roll it out to 31 days to expiration,

we now have locked in a profit on this

trade of $984.

We have now more than paid for the cost

of that call. And now we're just going

to keep letting time erode on this. And

as time passes, we're still theta

positive. And this trade is going to

make more money.

So, we get to where we're again 10 days

to expiration and it's time to exit. And

the reason why I say it's time to exit

is because if we look at our days to

expiration on our long call,

we're getting within that 30-day window.

Now, this is when we're going to start

to see theta decay really start to erode

on this call. We have made a great

profit on this trade. And we have now

just time to move on and find the next

trade that we have uh to go on to.

So, we'll close this out and move on to

our diagonals.

What if a calendar spread isn't enough?

What if you're more directional? A

calendar spread is designed for neutral

to slightly directional markets.

But when you have a stronger conviction

on direction

while still wanting to reduce the cost

of your long, it's time to consider

diagonal spreads.

A call diagonal spread, we would say, is

a cousin to a calendar spread.

It's very similar in the trade

structure, but there's also going to be

very different trade-offs within this

trade. Your market outlook should be

moderately bullish.

It could be very strongly bullish. It

could be neutral. It should be anything

but bearish.

The way we're going to do this is we're

going to buy the long strike call. Still

going to be our anchor in the trade. and

we're going to sell a higher strike call

closer to expiration to collect the

premium to reduce our cost in the trade.

Now, let's look at our call diagonal

trade using the exact same equity. As we

jump back into option explorer, let's

show how we would structure the call

diagonal trade and how it would have

performed in the exact same market

environment.

We're going to start with the ex with

the same long call that we did buy prior

at 98 days to expiration at the 990

strike. What we're doing is we're now

going to the same expiration as before,

but we're selling at a higher strike.

And that's where the diagonal comes

through because you're actually selling

on one side of the options chain and

then going out further. and it's a

diagonal line across them to get to

where your other option is.

What are the key differences on this

particular trade is we are not overly

neutral. This is definitely directional

in nature. As the market moves up, we

are going to make more money. We can

take a quick look at what the calendar

would have looked like. Here's our

calendar trade. It's very neutral. Here

is our diagonal trade. it is much more

bullish on the trade on the market in

general or Costco in general. Just like

the last trade, we're going to go

adjustment by adjustment and see how

this would have worked out. Here we are

10 days to expiration on our short.

And what we need to do here is we're

going to just roll this out to the same

strike, just going out further in time.

And what we'll see here is our overall

cost basis is $3,657.

And let's watch what happens to that as

we roll this out in time. We're now at a

net exposure of $2,789.

And what we did is we rolled this out to

31 days to expiration.

And we're going to let this trade still

work in our favor. What has Costco done

so far? Not really much of anything. We

went up, we've chopped back down, and

the market has stayed very neutral.

Now, our next adjustment,

again, we are 10 days to expiration. We

do not want to go too close to

expiration. We want to avoid assignment,

gamma risk, all that stuff that comes

with it. So, make the nice simple trade

and we're going to roll this out again

in time and watch what happens to our

net exposure in the trade.

We're down to $1,738

in the trade. We're rolling out to 31

days and we still have 59 days on our

long for this trade to work in our

favor. We're up a nice profit on here.

And as we're doing this, we're creating

income for us while making sure that

that long call is being paid for.

Here we are again. 10 days to

expiration.

Same exact thing. We're just going to

keep rolling out more in time. So, what

happens here? We're going to be buying

back that short that we bought or short

that we sold and we're going to be

rolling that out

to

31 days.

Now, our net exposure is $63

in this trade. So, here we are. We're

getting to again inside that 30-day

window. And we want to make sure that

this long doesn't start to decay more

than the short. And this trade has

actually worked out pretty well in our

favor. So, what have we done? We have

now reduced our net exposure over the

trade to $63.

The market has or Costco has really not

moved at all. And we're going to just

exit this trade and move on to the next

one. We have created good income for

ourselves and we weren't overly right on

the direction of the call. We started

out and Costco was actually at $998

and we're exiting when it's at $989

for a profit. So, you might be asking

yourself, what happened if I just bought

the call?

So, let's show you exactly how this

trade would have worked out if you just

bought the outright call.

We went out to 98 days and we bought our

990 call.

By the time of exit,

this trade would have been down 62% and

you would have lost $3,574.

Let's review the three most common

mistakes to avoid when initiating call

calendar and call diagonal trades. The

first one is buying too short-term. A

long option with fewer than 90 days to

expiration decays too fast to support

the strategy. I would even suggest going

longer out in time. This is meant for

you to have a macro long bias on this

trade and you're looking to cover that

cost by selling consistent premium

against it.

Another mistake is not rolling the

short. Letting the short option expire

instead of rolling it leaves you open to

greater assignment risk. And the last

one is selling too close to expiration.

The short option sold too near to

expiration exposes you to gamma risk.

Keep the short 21DTE plus at entry. If

there's one thing I want you to take

away from this lesson, it's this. Buying

a call is only one way to express a

bullish opinion. The real edge isn't

just predicting where a stock is going.

It's knowing how to structure the trade

once you have that opinion. Sometimes a

simple long call is the right choice.

Other times, adding a short call against

that position can reduce your cost,

change your risk profile, and make the

trade work more efficiently. The key is

understanding why you're choosing one

structure over another.

As you start looking at bullish

opportunities,

don't stop at asking, should I buy a

call? Instead, ask yourself, is there a

better way to structure this trade?

because that question experienced

options traders ask before they ever

place an order. Thanks for watching.

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