Unit 1 · Level 2 · Vertical spreads
Why spread
In League 1 you learned that a lone long call bleeds theta every day and gets crushed when implied volatility drops. A vertical spread fixes part of that: you buy one option and sell another at a different strike, same expiry. The option you sold pays for part of the one you bought, and its theta bleed partly cancels yours. In exchange, your profit now has a ceiling.
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What you get asked
Compared with buying a single call, what does a vertical spread change?
A spread is a trade-off: the short leg reduces your cost and risk, but it also sells away everything above its strike. Defined risk, defined reward.
A vertical spread means buying one option and ___ another at a different strike, same expiry.
The sold leg is what makes it a spread: it finances the bought leg and defines the structure's risk on both ends.
Match each position to its risk profile
Verticals turn the wild profiles from League 1 into boxed ones. Advanced traders mostly trade boxes, not lottery tickets.
Why does selling the second leg make the position cheaper to hold through time?
You still lose theta on the option you bought, but you collect theta on the one you sold. The net bleed is much smaller than a naked long option's.
A friend says 'spreads are for cowards; real traders want unlimited upside.' What's the sharpest reply?
Most far-OTM 'unlimited upside' expires worthless. You pay for a tail you rarely touch. Spreads sell that expensive tail to someone else. Same logic as the risk:reward maths from the Trading course. 🐜
The rest of this unit
Trade some upside for a hard ceiling on loss. It's the spread trader's first tool.