Covered calls: rent out your shares

Why is this important?

Everything so far has been instruments: premium, theta, delta, IV. This lesson is the first full machine built from them, and it is deliberately the gentlest one. A covered call takes something most investors already have, shares held for the long term, and adds a second income stream to them: option premium, collected month after month.

Lesson 16 called theta "rent". For an option buyer that rent is a cost. The covered call is your first time standing on the landlord's side with a safety net already built in: if the sold call goes wrong, the "loss" is delivering shares you own at a price you chose.

One switch to notice: we move from NIFTY to a stock, Reliance at ₹1,400 with a lot size of 500 shares. Stock options in India trade monthly only (expiry on the last Tuesday on NSE), and unlike index options they settle by physical delivery: real shares change hands. That detail is exactly why this strategy works so cleanly, and we will use it.

Real market example

Ramesh holds 500 shares of Reliance bought long ago, now trading at ₹1,400. His holding is worth ₹7,00,000. He sells one monthly 1,450 CE at ₹20, collecting ₹20 × 500 = ₹10,000, about 1.4% of his holding's value, for one month.

Three endings, all real:

• Reliance drifts to 1,420 by expiry. The 1,450 call dies worthless. Ramesh keeps his shares, keeps the ₹10,000, and his holding is up ₹10,000 on top. Next month he can sell another call. This is the ending the strategy is designed for.
• Reliance jumps to 1,550. The call lands 100 points ITM. Through physical delivery, Ramesh sells his 500 shares at ₹1,450. His profit is (1,450 − 1,400 + 20) × 500 = ₹35,000. Good money, but plain holding would have made ₹75,000. The sold call cost him ₹40,000 of rally. This is the true price of the rent.
• Reliance falls to 1,300. The call dies worthless and he keeps ₹10,000, but his shares are down ₹50,000. Net −₹40,000. Read that again: the covered call cushioned the fall by only ₹20 per share. It is an income strategy, never a shield.

His breakeven for the month is 1,400 − 20 = ₹1,380. Below that, he loses despite the premium.

Key concepts

• Covered call: own the shares, sell a call against them. The shares "cover" the obligation, so the short call's open-ended risk from Lesson 2 disappears: worst case, you deliver stock you already hold.
• The three endings: expire worthless (keep rent, repeat), called away (sell at your chosen price plus rent), stock falls (rent softens, does not save).
• Breakeven: purchase price minus premium collected. Here ₹1,380.
• Capped upside: your maximum for the month is (strike − cost) + premium, however far the stock runs.
• Assignment in India: index and stock options are both European style, exercised only at expiry, so nothing can be "taken away" mid-month. At expiry an ITM stock option settles by physical delivery of shares.
• Margin reality: the exchange charges margin on the short call (roughly ₹1 to ₹1.5 lakh for a lot this size), but pledging the Reliance shares as collateral covers most of it.
• Realistic returns: ₹10,000 on ₹7,00,000 is about 1.4% for the month when all goes well. Across a year with a few capped rallies and a down month or two, mid-teens percent is a good outcome, not the "3% a month, 40% a year" arithmetic sellers of courses like to show.

Visual explanation

The payoff below is the whole deal on one line: below 1,450 it is just your shares plus ₹10,000 of rent; above 1,450 it goes flat at ₹35,000, because every further rupee of rally belongs to the call buyer. Hover the left edge to see the honest part: the downside is nearly as naked as plain stock ownership.

How traders use it

• Sell against holdings you intend to keep anyway, using strikes you would genuinely be happy to sell at. If being called away at 1,450 would upset you, 1,450 is the wrong strike.
• Pick strikes by delta, around 0.20 to 0.30. From Lesson 17, that reads as roughly a 1-in-4 chance of being called away, and premiums there are still worth collecting.
• Take profits early. If the call decays from ₹20 to ₹6 with two weeks left, most of the rent is already earned. Buying it back and reselling next cycle often beats waiting out the last few rupees.
• Decide about earnings months in advance. An earnings date inside the expiry inflates the premium (extra rent) and the gap risk (extra danger). Sell through it deliberately or skip the month, never accidentally.
• Repeat, mechanically. The strategy compounds through boring repetition, not through one clever month.

Using it with other tools

• IV rank (Lesson 19) times your entry. The same 1,450 CE might fetch ₹14 in a sleepy month and ₹28 in a nervous one. Selling when IV rank is elevated is the difference between thin rent and rich rent on identical risk.
• Chart resistance + the chain (Lesson 15) place your strike. If the chart shows sellers repeatedly appearing near ₹1,460 and the chain shows a heavy call OI wall at 1,460, a 1,460 strike sits behind two layers of defence. You are renting out a level the market already struggles to cross.
• The delta column (Lesson 17) is your odds meter. Reading 0.25 on your strike converts the vague "probably safe" into "about one month in four I get called away", which you can actually plan around.
• The theta table (Lesson 16) sets your calendar. Rent collection accelerates into expiry, so the final two weeks earn faster than the first two. Many sellers close early winners and redeploy rather than babysit the last ₹3.
• Skew (Lesson 19) explains your slightly thin rent. Call-side IV sits below put-side IV on most underlyings, so call sellers earn the lean side of the fear premium. The fat side belongs to put sellers, which is exactly Lesson 21.

When the company rewrites your contract

Stock options carry a risk index options simply do not have: the company underneath can change shape while you are holding the contract.

Ramesh is short the 1,450 CE against his 500 Reliance. One evening the company announces a 1:1 bonus. Next morning the stock opens near ₹700 instead of ₹1,400. His 1,450 call looks gloriously, permanently out of the money. Has he just won ₹10,000 for free?

No. The exchange performs a contract adjustment, and it is designed so that nobody wins or loses from the corporate action itself:

The adjustment factor for a 1:1 bonus is 2: strike divided by it, lot size multiplied by it. Ramesh's economics survive untouched, and his 500 shares became 1,000 on the same morning, so the position is still exactly covered.

What gets adjusted, and what does not.

• Adjusted: bonuses, stock splits, consolidations, rights issues, mergers and demergers, and extraordinary dividends — NSE's line is a dividend above 2% of the stock's market value.
• Not adjusted: ordinary dividends. They are expected, and already priced into the option before it is quoted.

That second bullet is quietly good news for a covered-call writer. On the ex-dividend date the stock drops by roughly the dividend and the call is not compensated — but Ramesh, as the shareholder, receives the dividend. He collects it; the call buyer absorbs the drop. Dividends structurally favour the person who owns the shares and rents them out.

The two things to actually do.

• Check the position the next morning. Your lot size has changed, which means every rupee figure you memorised — margin, breakeven, the P&L per point — is now wrong until you redo it. Adjusted lot sizes are the most common source of a position that is accidentally twice the size the trader thinks it is.
• Expect a thinner market. Adjusted series trade at odd strikes like 725 in a chain built around round numbers, and they are often lightly traded for weeks. Lesson 11's rule matters more than usual here: limit orders only, and check the depth before assuming you can get out.

Index options are never adjusted for corporate actions — NIFTY absorbs them inside the index itself. This entire section is the price of admission for trading options on individual companies.

Common mistakes

• Selling calls on shares you are not willing to lose. Assignment is not an accident; it is the contract working. Decide before, not after.
• Treating the premium as protection. ₹20 of rent against a ₹100 fall is a cushion the thickness of a newspaper. Hedging is Lesson 8's protective put, a different tool.
• Chasing fat premiums on wild stocks. A junk stock paying triple rent pays it because the fall risk is triple too. The premium is never mispriced charity.
• Panic-buying the call back in a rally. The short call shows a scary loss while your shares quietly gain more. Judge the position as one unit, not leg by leg.
• Forgetting the long-run cost. Studies of systematic covered-call selling show smoother returns but real underperformance in strong bull years. The strategy trades away the best months. Know that going in and it will never feel like betrayal.
• Trading the adjusted contract on old arithmetic. After a bonus or split your lot size has changed. Every number you had memorised — margin, breakeven, ₹ per point — is stale until you redo it on the new lot.
• Letting an ITM covered call run into expiry to "save the brokerage." Physical settlement means real delivery, delivery margins through the final four days, and STT on the whole contract value. Lesson 6 prices that mistake out in full.

Quiz

Get 4 of 5 right to finish the lesson. No account needed. Progress saves in this browser.