Range-Bound Income: Iron Condors

First, a few plain words. A strike is the fixed price in an option contract. An expiry is the last day the contract lives. A premium is the price of the option, paid by the buyer to the seller, like the premium on an insurance policy. A call gains when the index rises above its strike. A put gains when the index falls below its strike.

An iron condor is two credit spreads together. Below the index you sell a put and buy a cheaper put further down. Above the index you sell a call and buy a cheaper call further up. All four options have the same expiry. The two options you sell are the “body”. The two you buy are the “wings”. The wings are insurance: they cost you a little, and in return they put a ceiling on the loss.

Why is it called a credit? Because the two options you sell bring in more cash than the two you buy. That net cash is the most you can earn. You earn all of it only if the index closes between the two sold strikes on expiry day, because then all four options expire worthless.

This is the same idea as the credit spreads in the earlier module on vertical spreads. If those are new to you, read that module first. The condor is a bull put spread and a bear call spread held together.

Illustration only. Suppose NIFTY is at 24,500 and one lot is 65 units. You sell the 24,300 put at ₹110 and buy the 24,100 put at ₹60. That is a credit of 110 − 60 = ₹50. You sell the 24,700 call at ₹85 and buy the 24,900 call at ₹40. That is a credit of 85 − 40 = ₹45. The total credit is 50 + 45 = ₹95 per unit.

For one lot the credit is 95 × 65 = ₹6,175. That is the maximum profit. It is earned when NIFTY closes anywhere from 24,300 to 24,700. The width of each spread is 200 points. The maximum loss is the width minus the credit: (200 − 95) × 65 = 105 × 65 = ₹6,825. It happens if NIFTY closes at or below 24,100, or at or above 24,900. The market can only be on one side of the range at expiry, so only one side can lose.

The breakevens are the short strikes moved outward by the credit. Lower: 24,300 − 95 = 24,205. Upper: 24,700 + 95 = 24,795. A close between 24,205 and 24,795 makes a profit. A close outside that band makes a loss, and the loss stops growing once the index passes 24,100 or 24,900.

Price action only: the index does not have to stay in the range all week. Only where it closes on expiry day decides the final result. But during the week the position can show a loss when the index nears a sold strike, and that can force you to decide whether to exit.

Theta is the daily loss of an option’s time value. Delta is how much an option price moves for each one-point move in the index. Vega is how much the price moves when implied volatility (IV) changes. IV is the market’s priced-in expectation of movement, much like a monsoon forecast is priced into the cost of an umbrella.

A condor is short time value, so passing time helps it, as long as the index stays away from the sold strikes. It is also short vega, so a rise in IV hurts it even if the index has not moved. That is why a condor can show a loss during a nervous week and then recover, or not recover.

Delta starts near zero, because the calls and puts roughly offset. When the index moves toward one sold strike, delta grows on that side and the position becomes a directional bet without your choosing it. Close to expiry, small index moves change the price of the sold options a lot. This is called gamma risk, and it is the reason many traders exit early rather than hold to the final hour. Exiting early is a choice with its own cost: you pay the exit prices, and you give up any remaining credit.

What this does not tell you: no rule such as “close at half the profit” or “exit at 21 days” is proven to improve results for you. Such rules are habits some traders use to manage risk. Test any rule on your own records, with your own costs, before you rely on it.

A short strangle sells the same two options but buys nothing. It collects more premium and needs a wider band to be wrong in. But its loss has no ceiling. The condor gives up part of the credit to buy that ceiling. Neither is better in every situation; they are different bargains between reward and protection.

The takeaway: if you would lose sleep over an uncapped loss, the condor is the structure whose worst case you can write down today. If a fast market can still cost you the full amount in one session, size the position so that the full loss is a small part of your capital.