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The logic of vertical spreads — lower premium, defined loss, and what it costs
Published by The Retail Trader · AUG 09, 2026 · Features
Buying or selling a naked option are two extremes: in one the probability is against you, in the other the tail risk. A spread is the middle path — two legs together, so that a wall stands on both sides.
In the same expiry, you buy an option at one strike and sell an option at another. The bought leg is your view; the sold leg reduces its cost and closes off the risk on one side.
Two things follow from this: the net premium becomes smaller, and the maximum profit also becomes capped. This trade-off is the whole strategy.
The names differ, the technique is the same:
• Bull call spread — buy the lower call, sell the upper one. A mildly bullish view, low cost, capped profit.
• Bear put spread — buy the upper put, sell the lower one. A mildly bearish view, the same structure in reverse.
• Bull put spread — sell the lower put, and hedge by buying one even lower. A credit comes in, and risk stays defined.
• Bear call spread — sell the upper call, and buy one even higher. The same thing on the other side.
The biggest problem with naked selling is gap risk — on overnight news there is no limit to the loss. In a spread, the other leg creates that limit. You know in advance how bad the worst day can be.
The biggest problem with naked buying is theta. In a spread, the theta of the leg you sold works in your favour, so the daily cost comes down.
Two legs means two sets of charges, crossing the spread twice, and the same again on exit. At small size this cost weighs heavily against the profit.
Another point: capped profit only looks good on paper. On the day your view turns out exactly right and the move is big, the spread stops you right where you yourself built the wall. This is the premium for insurance — and insurance only makes sense when it comes in useful.
Think of a spread not as a strategy but as a definition of risk. Before taking the position, write this down: how much is the maximum loss, how much is the maximum profit, and where is the break-even. If you can't write these three numbers in advance, it isn't a spread — it's two separate positions sitting together.
This article is for educational purposes only — it is not a buy or sell recommendation, makes no claim of guaranteed returns, and is not advice. Rules, rates and mechanics are changed from time to time by the exchanges, SEBI and RBI, so verify every number yourself with your broker or an official source.