Vertical Spreads

You want to bet on direction but a naked call costs too much and bleeds theta like a broken faucet. Enter the vertical spread: capped risk, capped reward, and a much cheaper ticket.

A vertical combines two options of the same type (both calls or both puts), same expiry, at different strikes. One leg pays for part of the other. You give up unlimited upside in exchange for a known worst case. Every multi-leg strategy you will encounter (iron condors, butterflies, ratio spreads) is built from verticals as building blocks.

Debit vs Credit

Two ways to structure the same directional bet. Everything else follows from this split.

Debit Spreads

You pay premium upfront

Buy the more expensive option, sell the cheaper one
Need the underlying to move in your direction to profit
Time decay works against you (especially early in the trade)
Lower probability of profit, higher reward-to-risk

Bull call spread and bear put spread are debit spreads.

Credit Spreads

You receive premium upfront

Sell the more expensive option, buy the cheaper one
Profit if the underlying stays away from your short strike
Time decay is your friend -- you want the clock to run out
Higher probability of profit, lower reward-to-risk

Bull put spread and bear call spread are credit spreads.

How Width Works

Width is everything. A 5k-wide BTC spread and a 20k-wide BTC spread are completely different trades.

The distance between your two strikes controls the entire risk/reward envelope:

Attribute

Narrow (e.g., $3k wide)

Wide (e.g., $15k wide)

Max profit (debit)

Small

Large

Max loss (debit)

Small

Large

Cost to enter

Lower

Higher

Probability of max profit

Higher

Lower

Behaves like...

Binary bet

Naked option

Narrow spreads are cheap lotto tickets. Wide spreads start to resemble the single-leg trade you were trying to avoid paying for. The sweet spot depends on how far you actually think the underlying moves, not how far you hope it moves.

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Spreads don't eliminate risk. They trade unlimited exposure for known boundaries. Max profit = width - net premium (debit) or net premium (credit). Max loss is the inverse. The width sets the cage. The premium decides where you stand inside it.