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The whole truth about unlimited profit and limited loss — and the probability the brochure doesn't mention
Published by The Retail Trader · AUG 09, 2026 · Features
The most repeated line about options is this: the buyer's loss is limited and profit unlimited; the seller's profit is limited and loss unlimited. It is technically correct and practically incomplete — because it says nothing about probability.
The buyer pays a premium and in return buys a right. His maximum loss is that same premium. But for him to win, three things are needed at once: the right direction, a big enough move, and all of it before expiry.
All three happening together is less common than it seems. That is why most OTM options expire worthless — this is not a flaw in the system, it is its design.
The seller collects a premium and in return takes on an obligation. His maximum profit is that same premium, and the loss can theoretically be very large.
In return he gets one big thing: he doesn't need anything to happen to be right. If the market stays flat, moves slightly against him, or drifts slowly ahead — in all three cases time does his work. He doesn't need to be right on direction, only 'not very wrong'.
What comes along with selling:
• Margin — a sizeable amount of capital gets blocked to sell, which can be many times more than what it takes to buy.
• Mark to market — the moment the position goes against you, money can be deducted every day, even if that option finally goes to zero at expiry.
• Gap risk — if the market opens with a gap on overnight news, the seller gets no chance to exit. A stop loss does not work across that gap.
• Big hits, low frequency — small wins come again and again, and one big loss eats them all in a single day. That is why the seller's real job is risk control, not having a view.
The buyer's common mistake: buying the cheapest OTM option because it lets him take a bigger lot. It is cheap because its chance of winning is the lowest.
The seller's common mistake: assuming 'this strike will never be hit' and selling without a hedge. It keeps working again and again — until it doesn't, and the account for that one day is bigger than the whole year.
The buyer buys a big payoff with a small probability. The seller buys a small payoff with a big probability. On both sides the expected value comes out at roughly the same place, and charges are deducted from it. So the real difference is made not by strategy but by risk control.
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.