A covered call combines two positions: you own the shares (or an equivalent position) and you sell a call option on them. Selling a call means someone pays you a premium for the right to buy your shares at the strike price. The call is "covered" because you already own what you might have to deliver, so a sharp rise does not create an open-ended loss as it would with a naked call.
The idea is simple: you collect regular income from shares you plan to hold anyway, and in return you agree to give up any rise above the strike for that period.
How the payoff works
At expiry, three things can happen:
- The share ends below the strike: the call expires worthless. You keep the premium and the shares. Your result is the share's gain or loss plus the premium.
- The share ends above the strike: the call is in the money. Your shares are effectively sold at the strike. You keep the premium plus the rise up to the strike, but nothing beyond.
- The share falls sharply: you lose on the shares just as you would without the call; the premium only softens the fall.
Maximum profit = (strike − purchase price) + premium received
Breakeven = purchase price − premium received
A worked example on a stock
Say you own shares of Reliance Industries bought at ₹1,400, in a quantity equal to one lot of its stock options (lot sizes change, so check the current figure on NSE). You sell the ₹1,480 call for this month's expiry for ₹18 a share. Your breakeven falls to 1,400 − 18 = ₹1,382, and your maximum profit is (1,480 − 1,400) + 18 = ₹98 a share.
| Share at expiry (₹) | Shares P/L | Call P/L | Total per share | Comment |
|---|---|---|---|---|
| 1,300 | −100 | +18 | −82 | Premium only cushions the fall |
| 1,382 | −18 | +18 | 0 | Breakeven |
| 1,400 | 0 | +18 | +18 | Flat share, income kept |
| 1,450 | +50 | +18 | +68 | Below strike, both gains kept |
| 1,480 | +80 | +18 | +98 | Maximum profit |
| 1,550 | +150 | −52 | +98 | Gains above 1,480 given up |
| 1,650 | +250 | −152 | +98 | Still capped |
The ₹18 is about 1.3% of the share price for one month. That can look attractive, but the table shows the trade-off clearly: in a big rally you miss out, and in a big fall you lose almost as much as an unhedged holder.
Live example: checking the stock before selling a call
Covered call writers usually prefer a stock that looks steady or mildly positive, not one breaking out sharply. Here are the current indicators for Reliance Industries:
A strong uptrend (price far above its averages, high RSI) argues for a higher strike or no call at all, since a capped gain hurts most in a rally. A stock drifting sideways near its averages is the setting where covered calls tend to fit best.
Premiums also depend on how nervous the market is. Higher volatility means more income from the same strike, but it comes with bigger moves:
When IV rank is low, the income from selling calls is thin; when it is high, the premium is richer but so is the chance of a large move either way.
Choosing the strike and expiry
- Close to the price (at the money): the most income, but the shares are likely to be called away and almost all upside is given up.
- Further out of the money: less income, more room for the share to rise before the cap applies.
- Monthly expiry: stock options in India are monthly. Selling the current month collects the fastest decay; the next month collects more rupees but over a longer time.
Many writers pick a strike near a resistance level they would be happy to sell at anyway. See how to choose a strike price.
Physical settlement: the part people forget
Stock options on NSE are physically settled. If your sold call ends in the money at expiry, you must deliver the shares at the strike price. If you hold them in your demat account, your broker will usually handle the delivery, but it is a real sale with tax consequences. If you want to keep the shares, buy back the call before expiry. Brokers also ask for extra margin on in-the-money positions in the last days before expiry; check your broker's rules. The physical settlement guide explains the process.
Covered calls on an index
Many traders do not own a stock but want the same idea on NIFTY. The usual version is holding NIFTY futures (or a NIFTY ETF) and selling an out-of-the-money NIFTY call each week or month. The payoff has the same shape. With an ETF, the call is still a separate margin position, because the ETF units are not accepted as cover by default; check what your broker allows. You can test the payoff in the strategy builder with a futures leg and a sold call.
Managing a covered call
- Share rises toward the strike: buy back the call and sell a higher strike or a later expiry ("roll up and out"), often at a cost.
- Share falls: the call decays fast and can be bought back cheaply; some sell a new, lower call, but that locks in a lower selling price.
- Near expiry: decide early whether you are willing to deliver the shares.
Adding a bought put below the price turns a covered call into a collar, which also limits the downside.
What a year of covered calls really looks like
The appeal of covered calls is the steady income, but the results depend on the path of the share. Think of twelve monthly calls on the same holding:
- Quiet months: the share drifts a little and the call expires worthless. You keep the premium. These months make up most of the income.
- Rally months: the share jumps through the strike. Your gain is capped for that month, and if you roll the call to keep the shares, buying it back can cost more than several months of premium.
- Falling months: the premium softens the loss a little, but the shares still fall. Selling a new call at a lower strike after the fall can lock in a selling price below what you paid.
Over a full year, a covered call position usually earns more than plain holding in a flat or slightly rising market, less in a strong bull market, and about the same, minus a small cushion, in a falling one. In other words, you trade some of the best months for a little extra in the ordinary ones. That suits an investor who values regular income and would be content to sell at the strike, and it suits poorly someone holding a stock mainly for a large future rise.
Option sellers also need to understand the difference in risk between buying and selling options; the buyer vs seller guide covers it, and theta decay explains why sold options lose value with time.
Common mistakes
- Thinking it is low risk. The shares carry almost their full downside.
- Selling calls on a stock you expect to run. You give away the move you were hoping for.
- Selling right before results. Premiums are high for a reason; a gap up caps your gain, a gap down hurts the shares.
- Forgetting delivery. An in-the-money call at expiry means your shares are sold.
- Ignoring tax and costs. Option income is usually taxed differently from share gains; check with a tax adviser.