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The covered call, and exactly what you are selling

Reading for India · about 11 min

The answer

A covered call means you own 1 lot of a stock and you sell somebody the right to buy it from you at a fixed price. You are paid a premium today. In return you give away everything the stock does above that price, for the life of the contract.

Why this costs you money

The covered call is sold to retail investors as free income. It is not income. It is the sale of an asset you own, and the asset is your right to a large gain.

Here is the damage. You hold a stock for 3 years. Every month you sell a call about 5% above the price and collect a small premium. For 30 months this works. Then the company wins a contract and the stock rises 60% in 6 weeks. You are forced to sell at 5% up and watch the rest from outside.

Stock returns are not spread evenly across months. A small number of months carry almost all of the gain. The covered call sells exactly those months.

The second damage is constant. You keep all of the downside. If the stock falls 40%, the premium covers a small part of it. You sold the top and kept the bottom.

How it works

You need 3 things.

  1. The stock, in the exact quantity 1 contract covers. In the United States that is 100 shares. In India it is 1 lot, set by the exchange for each stock. current NSE lot sizes; they are revised periodically.
  2. A strike price above the current price. This is where you agree to sell.
  3. An expiry date. The agreement ends then.

You sell the call. The premium is credited immediately and it is yours whatever happens. Because you already own the shares, your broker does not ask for the large margin a naked call writer pays. The shares are the collateral. That is what "covered" means.

At expiry there are 2 outcomes.

  • The stock is below the strike. The call expires worthless. You keep the shares and the premium. You may sell another call.
  • The stock is above the strike. The call is exercised against you. You deliver the shares and receive the strike price. Your gain stops there.

What it costs, and what it gives up

There is no cash cost. The cost is paid in future upside, which people value poorly because they have not received it yet. You receive a premium today, which is certain. You give up everything above the strike until expiry, and you give up control of when you sell your own shares.

Three further costs are usually hidden.

The tax event. Exercise means you sold your shares. In India that can turn a holding you meant to keep past 12 months into a short-term gain. the current Indian capital gains rates. In the United States it can end a long-term holding period.

The buy-back cost. If the stock runs and you no longer want to sell, you buy the call back at far more than you were paid. The "income" becomes a real loss.

The compounding cost. Long-run data on systematic buy-write indices in the United States shows returns roughly in line with the underlying index, at lower volatility. the current CBOE BXM series. Lower volatility is real. Higher return is not what the data shows, and that is how this is sold.

Who is on the other side, and why they are willing to be there

Ask this before every options trade. The buyer of your call is 1 of 3 people, and none of them is a fool.

A market maker. They do not want a view on your stock. They buy your call and immediately sell shares to cancel the direction. What they keep is the difference between the volatility you sold them and the volatility the stock delivers. They do this thousands of times a day and are paid for being right on average.

A directional speculator. They want leverage on a move. Most lose. But their losses are many small ones and their wins are enormous, and your position is the exact mirror of theirs.

A hedger closing a short. Somebody short the stock will pay for a cap on their loss.

The discipline is this. The premium you are quoted is not a gift. It is the number at which a firm with better volatility models than yours is indifferent. If it looks generous, the market is expecting a large move, and that is exactly the condition under which selling your upside is a bad idea.

The maximum loss, as a number

People say a covered call has no maximum loss because you already own the stock. That is a word game. There are 2 losses and both are real.

Loss 1 — the position loss. The stock goes to 0. On a holding worth 10,00,000 rupees, or 10,000 dollars, with a 1.5% monthly premium, the maximum loss is 98.5% of the capital committed. In a 40% fall the premium covers under 4% of it.

Loss 2 — the opportunity loss, which is the one that happens. You sold a strike 5% up and the stock rose 30%. You captured 5% plus premium and gave up 25%. On that same 10,00,000 rupee holding, 2,50,000 rupees of gain went to the buyer. That is 25% of the capital committed, gone as a gain you never see.

The overnight gap. Covered calls are often sold across results and policy dates because the premium is larger then. It is larger for a reason.

  • Meta Platforms fell about 26% in a single session on 3 February 2022.
  • Netflix fell about 35% in a single session on 21 April 2022.
  • In India, Adani Enterprises and related shares fell heavily over the sessions following the Hindenburg Research report of 24 January 2023.

A gap hurts a covered call in both directions. Gap down, and the premium is trivial against the fall. Gap up on a takeover, and the call is deep in the money the instant the market opens. There was never a moment at which you could have bought it back cheaply. You do not get to react.

When it is genuinely reasonable to use

Narrower than the internet suggests. Three conditions, and all 3 should hold.

  1. You were already willing to sell at that price. This removes most bad covered calls. If a sale at the strike would annoy you, you are not selling a call. You are gambling that you will not be exercised.
  2. Being exercised would not be a portfolio event. Writing a call over your single best position is not income generation. It is capping your best idea.
  3. The premium is not large because of a known event. If you are paid well because results are due in 8 days, the market is paying you to carry a risk everybody can already see. That is not an edge.

There is a fourth, quieter use. If you have already decided to exit, a call sold at the price you wanted anyway gets you paid to wait. That is a legitimate exit tool, and it is the version most professional managers use.

The decision rule. Before you place the order, say this sentence: I am agreeing to sell this stock at this price on this date, and I am content. If it is true, the trade is a paid limit order and it is fine. If it is false, the premium is not compensation. It is bait.

Try this now

Five minutes, on a stock you own, with no order placed.

  1. Open a holding where you own at least 1 full lot, or 100 shares in a US account. Note the current price.
  2. Open the options chain for the nearest monthly expiry. Find the call strike about 5% above the price. Note the premium per share.
  3. Multiply the premium by the lot size. That is what you would be paid.
  4. Take 20% of your holding's current value. That is a 20% rise.
  5. You keep 5% plus the premium. The other 15% goes to the buyer.
  6. Divide the premium by that 15%.

What you should see. The premium is usually 1% to 3% of the holding value for a month. The amount surrendered in a 20% move is around 15%. The ratio is often 1 to 8 or worse. You are selling about 8 units of upside for 1 unit of certainty. That may still be a trade you want. It is not "free income".

Now repeat it on your largest holding, and notice whether you are still willing.

Three real cases

1. Berkshire Hathaway's index put sales, 2004 to 2008 — the seller had to survive the middle Warren Buffett's company sold very long-dated put options on 4 equity indices and collected billions of dollars in premium. the figure in Berkshire's annual letters. Through 2008 the mark-to-market loss ran into billions, reported quarter after quarter. The contracts eventually expired profitably. The lesson is not that option selling works. It is that it worked for a seller who could not be forced to close. No retail account has that property.

2. Twitter, April to October 2022 — the takeover cap After the agreed acquisition at 54.20 dollars per share, the stock traded in a band anchored to that number until the deal closed in October 2022. Sellers of calls above the deal price collected premium for months. Sellers of calls below it had capped their shares at a price the market already knew was too low.

3. GameStop, January 2021 — the gap that removes the choice The share price rose from under 20 dollars at the start of January 2021 to an intraday high above 400 dollars on 28 January 2021. Investors who had sold calls on shares they owned were exercised at strikes set weeks earlier. The move came in sessions that gapped, so there was no orderly point at which the position could be repaired. The premium collected was irrelevant.

The question that resolves it

A novice asks: how much premium can I collect? An expert asks: at what price have I just agreed to sell, and am I happy about it? The premium is the smallest number in the trade. The strike is the trade.

What would make this wrong

If the covered call were free income, a systematic buy-write index would out-return its underlying index over long periods. The long-run United States data does not show that. It shows similar or slightly lower returns at meaningfully lower volatility. the current published series.

The honest limits. Lower volatility is a real benefit. An investor who would otherwise panic and sell in a drawdown may be better off with a smoother path at a lower return. And in a market that goes sideways for years, covered calls produce a return that simply holding does not. The strategy is not wrong. The description of it is.

In India

Contract structure. Stock options on the NSE are physically settled. If your call is exercised, the shares are actually delivered. Index options are cash settled. the current settlement rules.

Lot sizes and capital. You cannot write a covered call unless you own a whole lot. SEBI raised the minimum contract value for index derivatives with effect from 20 November 2024, and stock lot sizes are set so contract values sit inside an exchange band. the current minimum contract value and lot size. The effect is that covered calls in India suit only fairly large single holdings.

Margin. Writing a call against shares in your demat account attracts reduced margin, but you must pledge the shares first. your broker's process.

Taxes. Securities transaction tax applies on the sale of an option on the premium, and on exercise on the intrinsic value. the current rates, revised with effect from 1 October 2024. Option writing gains are business income, not capital gains.

Liquidity. Only a limited set of Indian stocks have listed derivatives, and liquidity concentrates in near strikes and near expiries. On many stocks the call 5% out of the money barely trades. A covered call you cannot buy back is a covered call you cannot manage.

In the United States

Contract structure. 1 equity option contract covers 100 shares. Equity and ETF options are American style, so the buyer may exercise on any day.

Early assignment is real and predictable. The usual trigger is a dividend. If your call is in the money and the time value left in it is less than the coming dividend, a rational holder exercises the day before the ex-dividend date. You lose the shares and the dividend without warning.

Margin. Under Reg T, a call fully covered by shares in the same account needs no extra margin. That is why covered calls sit at the lowest options permission level at most US brokers, and why so many beginners start here.

Taxes. Assignment realises a capital gain. A call written too deep in the money can be a "non-qualified" covered call, which suspends the holding period of the stock for long-term capital gains. the current Internal Revenue Service rules. It is a real and commonly missed cost for a long-term holder.

Liquidity. Strike coverage is wide, expiries are weekly on large names, and spreads are narrow. Buying the call back to cancel the obligation is usually possible at a fair price.

Where they differ, and what that tells you

Three differences, and each one changes the trade rather than decorating it.

Early assignment. In the United States the shares can be taken on any day, most often just before a dividend. In India, stock options are European style, so exercise happens at expiry. the current NSE exercise style. The Indian trade has a fixed decision date. The American one has a date the buyer chooses.

Position size. A US investor can write 1 contract against 100 shares, perhaps 3,000 dollars of stock. An Indian investor must own a full lot, usually several lakh rupees of 1 company. The strategy is open to a US beginner and effectively closed to a small Indian account. That matters, because most Indian retail traders who say they "sell calls for income" are not covered at all. They are writing naked index calls, which is a different risk entirely.

What the premium is paying for. In both markets, implied volatility tends to sit above the volatility that arrives. That is why sellers are paid at all. But SEBI's own studies report that the large majority of individual participants in the Indian equity derivatives segment lose money. the SEBI study of September 2024 and its predecessor of January 2023. If the seller's edge were available to anybody willing to collect premium, that could not be true. The edge belongs to whoever has the better model, lower costs and the capital to survive the bad month. That is usually not you.

Carry this

  • A covered call is a paid limit order to sell. If you would not place that limit order, do not sell that call.
  • The premium is the small number. The strike is the trade.
  • You keep all of the downside and sell the top.
  • A large premium means the market expects a large move. That is a warning, not an offer.

Knowledge check

Q. Two investors each own 1 lot of the same stock and each sell 1 call expiring in 30 days.

  • Investor A sells a strike 12% above the current price and is paid a small premium.
  • Investor B sells a strike 2% above the current price and is paid a premium roughly 4 times larger.

The stock rises 15% over the month. What is the important difference?

Explanation. The tempting answer is the first. A larger premium feels like a better trade, and every screener that ranks covered calls by "return" puts Investor B on top. That ranking measures the premium and ignores what was sold.

Investor A gave up everything above 12% and kept 12% plus a small premium. Investor B gave up everything above 2% and kept 2% plus a premium worth perhaps 3%. On a 15% move, A captured about 12% and B captured about 5%.

The 2 trades are not equivalent even before the outcome is known, because they sell different amounts of the distribution. The near strike sells almost all of the upside and is exercised most of the time. The far strike sells only the rare large move. Which is right depends on whether you were willing to sell at 2% up. The premium does not answer that question.

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