Options Selling — The Unlimited Risk Myth

Almost every beginner hears the same warning in their first week. Never sell options, the risk is unlimited, you can lose everything. It gets repeated so often that most people file it away as a rule and never look at it again.

It is not a useless warning. There is a real danger buried inside it. But the way it is usually told scares beginners away from the most controllable version of option selling, while doing nothing to stop the people who actually blow up their accounts.

So let us take the myth apart properly. Where the "unlimited" label comes from, where it stops being true, and what the real risk of selling options actually is.

Where the "Unlimited Risk" Label Comes From

The "unlimited risk" label comes from exactly one trade: selling a call option without owning the stock behind it. Traders call that a naked call.

When you sell a call, you collect a premium up front. In return, you have promised to deliver the stock at a fixed price if the buyer asks for it. If you do not own that stock, there is nothing backing your promise.

Now think about what happens if the stock keeps climbing. A share has no upper limit. A ₹1,500 stock can become ₹3,000, then ₹5,000.

Since the price you must pay has no ceiling, your loss has no ceiling either. That is the one place where the word "unlimited" is mathematically honest.

But look closely at what that sentence needs to be true. It needs a call, sold naked, on something that can rise without limit. Change any one of those three things and "unlimited" stops applying.

Here is the same idea drawn out. Watch where each line stops.

Only one line above runs off the bottom of the chart. The other three flatten out. They reach a worst case and stop. That is the whole argument in one picture.

Selling Puts: Big Risk, But Not Infinite

Swap the call for a put, and the word "unlimited" fails right away, because a stock or an index cannot fall below zero.

When you sell a put, you collect a premium and promise to buy the stock at a fixed strike price if the buyer wants to sell it to you. Your worst case is the stock going all the way to zero.

At zero, your loss is the full strike price minus the premium you collected, and not one rupee more. That gives you a real number you can write down before you ever place the trade.

The formula is simple: maximum loss on a sold put = (strike price − premium received) × lot size. Let us put real figures on it.

The setup. Say you sell one Nifty put at the 23,000 strike and collect ₹120 per unit in premium. The Nifty lot size is 65, so one contract covers 65 units.

The numbers. Your maximum theoretical loss is (23,000 − 120) × 65 — about ₹14.9 lakh, and only if the entire Nifty index falls to zero. Your maximum gain is the premium: ₹120 × 65 = ₹7,800.

The verdict. ₹14.9 lakh is a frightening number, and you should respect it fully. But it is a number: finite, knowable, and nowhere near "infinite." The honest risk of a sold put is not infinity. It is a large, bounded loss that you must size your account for.

How Professionals Cap the Risk: Spreads

Here is the part the myth never mentions. Most risk-managed traders avoid selling options naked. They cap or offset the danger with spreads, and a spread has a maximum loss fixed in advance.

A spread simply means you sell one option and, at the same time, buy another option further away as protection. You collect a little less premium, because the option you buy costs money. In exchange, your loss can no longer run away from you.

There are three defined-risk sellers a beginner will meet first:

• Bull put spread. Sell a put, then buy a cheaper put below it. You profit if the market holds up or drifts higher.
• Bear call spread. Sell a call, then buy a cheaper call above it. This is the trade that turns the "unlimited" naked call into a fixed, known number.
• Iron condor. A bull put spread and a bear call spread placed together. You profit if the market simply stays inside a range.

In every one of these, the option you bought acts as a backstop. Your maximum loss is the gap between the two strike prices, minus the net premium you collected, times the lot size, and you know that figure before you click.

This is also why an experienced seller can sleep at night. The position is uncomfortable, but it can never surprise them. The worst day was priced in on day one.

The Risk the Myth Distracts You From

The "unlimited risk" scare hides the risk that actually empties retail accounts, and it has nothing to do with infinity.

The real danger of selling options is the shape of the payoff. As a seller you win often and small, then occasionally lose rarely and big. Most expiries, the option you sold expires worthless and you simply keep the premium. It feels easy.

Then one move erases a whole row of those wins at once. A high win rate hides a losing system if the wins are tiny and the losses are large.

The setup. Take a typical Nifty bull put spread that is 100 points wide, where you collect ₹25 of credit per unit.

The numbers. Maximum profit is ₹25 × 65 ≈ ₹1,625. Maximum loss is (100 − 25) × 65 ≈ ₹4,875. One full loss wipes out three full winners.

The verdict. Do that arithmetic and you need to win about 75% of the time just to break even, before a single rupee of brokerage. You can win 7 trades out of 10 and still be losing money. That, not infinity, is what quietly drains the account.

Do not take my word for the 75%. Move the sliders below and watch the breakeven win rate change as you adjust how much credit you collect.

The skewed payoff is the headline risk, but it is not the only one the myth talks over. Three more deserve your attention:

• Gap risk. Your maximum loss is defined. But a Budget, an election result, or an overnight global shock can hand you that full loss in a single jump, before you can react. Defined does not mean slow.
• Margin expansion. Selling options requires margin, and that margin is not fixed. When volatility spikes, the exchange raises it, sometimes mid-position. SEBI even added an extra 2% margin on short option positions on expiry day in November 2024. You can be forced out of a perfectly good trade simply because you have run out of margin.
• The discipline cost. A defined-risk spread still has to be held through the scary part. Most retail losses come from sellers who panic and close at the worst possible moment, or who double the size to "win it back."

None of this is theoretical. SEBI's July 7, 2025 study on the equity derivatives segment found that more than 91% of individual F&O traders lost money in FY25, giving up about ₹1.06 lakh crore between them. Very little of that was naked calls running to infinity. Most of it was ordinary sellers mismanaging position size, gaps, and that skewed payoff.

So, Should You Sell Options?

You can sell options sensibly, but only if you drop the naked positions and treat the defined-risk version as a skill, not a shortcut.

Five rules separate a controlled seller from a future SEBI statistic:

1. Sell spreads, not naked options. Always carry the protective wing. Your maximum loss should be a number you saw on the screen before you entered.
2. Size for the maximum loss, not the premium. Assume the full defined loss will happen, and make sure that number is small against your capital. If a full loss would hurt, the position is too big.
3. Know your breakeven win rate. Before the trade, work out the percentage you must win just to break even. If it is 80%, be honest with yourself about whether you can actually hit that.
4. Respect the calendar. Avoid carrying large short positions through known event risk such as Budget day, election results, or major central-bank decisions, unless you have sized for a violent gap.
5. Practise first. Paper trade the full cycle, including a losing month, before any real money is involved.

Notice that none of this is about avoiding "unlimited risk." It is about managing a defined, asymmetric risk well. That is a learnable skill, and a far more useful thing to carry away than the vague fear the myth leaves you with.