🧢 Covered calls: getting paid to put a ceiling on your stock

🎯 In 30 seconds: A covered call means you own 100 shares and sell one call option against them. You collect cash up front (the premium). In exchange, you agree to sell your shares at the strike price if the buyer wants them. Your upside is capped at the strike, your downside is almost the same as owning the stock, and the premium is a small cushion. It is an income strategy with stock risk, not a safe one.

The idea in plain words

You already know from Calls explained that a call gives its buyer the right to buy 100 shares at a fixed price, the strike, until the expiration date. Someone has to take the other side of that deal. When you sell (or "write") the call, that someone is you.

The buyer pays you a premium for that right. You keep the premium no matter what happens. If the stock ends above the strike, you will probably have to sell your 100 shares at the strike. That is called assignment.

The call is covered because you already own the shares you might have to deliver. Selling a call without the shares is a "naked" call, and its risk has no ceiling. A covered call does not have that problem: the worst case is the same as owning the stock.

Think of it like renting out a room in a house you own. You get rent every month. But you signed a contract that says the tenant can buy the house at a set price. If house prices jump, you still have to sell at that price.

The payoff at expiration

Here is the example used through this chapter. All numbers are hypothetical.

Three numbers describe every covered call. Write them down before every trade.

• Maximum profit = (strike - stock price paid + premium) x 100 = ($52.50 - $50 + $1.20) x 100 = $370. You get this at any price at or above $52.50.
• Breakeven = stock price paid - premium = $50 - $1.20 = $48.80.
• Maximum loss = (stock price paid - premium) x 100 = $4,880, if the company goes to zero. The premium only knocks $120 off the $5,000 you could lose.

Look at the shape. To the left of the strike, the blue line runs parallel to the stock-only line, just $1.20 higher. To the right of the strike, it goes flat. That flat part is the price you pay for the premium: every dollar the stock rises above $52.50 belongs to the call buyer, not you.

A worked example, five ways it can end

Same trade: 100 shares bought at $50, one $52.50 call sold for $1.20. Here is your profit or loss on the day the call expires.

The last row is where people get surprised. The stock rose 20%, and you made 7.4% ($370 on $5,000). If you had just held the stock, you would have made $1,000. That $630 gap is real money you agreed to give up when you sold the call.

The first row is the other surprise. The premium did not protect you from a $10 drop. It turned a $1,000 loss into an $880 loss.

Choosing the strike

The strike decides how much premium you collect and how much upside you keep. Here is the trade-off for the same $50 stock with 45 days to go. Premiums come from a pricing model (Black-Scholes at 30% implied volatility), rounded, so treat them as realistic, not real quotes.

Delta (see The Greeks) is a rough, model-based guide to the chance the call finishes in the money. A 0.36 delta call is often read as "roughly a one-in-three chance of being called away". It is an estimate, not a promise.

• Closer strike: more premium and a lower breakeven, but you will be called away more often and keep less upside.
• Farther strike: less premium, so less cushion, but you keep more of a rally.
• Below your cost: a strike under what you paid for the shares can lock in a loss if you are assigned. Check that before you sell.

The simplest rule: only sell a strike at which you would be genuinely fine selling the shares. If you would be upset to sell at $52.50, do not sell the $52.50 call.

Choosing the expiration

Options lose time value as expiration gets closer, and that loss speeds up in the last few weeks. As the seller, that decay works for you. This is why many covered call writers sell calls with roughly 30 to 45 days left and repeat every month. There is nothing magic about that window. It is a common balance between decent premium and not tying up your shares for too long.

Shorter expirations (weekly options) pay less per trade but more often. They also give you more decisions to make and more chances to be assigned. Longer expirations pay more in dollars but less per day, and you are locked into the ceiling for longer.

One honest way to compare is premium per day. $1.20 for 45 days is about 2.7 cents per share per day. Do not turn that into a big "annualized yield" in your head. You cannot repeat the same trade eight times a year at the same price, and some of those months the stock will fall.

Assignment: what actually happens

Most US stock options are American style, so the call buyer can exercise any day before expiration. When someone exercises, the Options Clearing Corporation (OCC) assigns the exercise to a brokerage firm, and the firm assigns it to one of its customers who is short that call. If that is you, your 100 shares are sold at the strike and the cash lands in your account. Exercise and assignment walks through the mechanics.

At expiration, options that finish in the money by $0.01 or more are generally exercised automatically under the OCC's "exercise by exception" process, unless the holder says otherwise. So if the stock closes at $52.60 on expiration day, expect to lose your shares.

Early assignment is less common but happens. It is most likely when the call is deep in the money with almost no time value left, and the day before an ex-dividend date when the dividend is bigger than the call's remaining time value. The call owner exercises to own the shares in time to collect the dividend.

Assignment is not a disaster. It is the deal you agreed to. You sold at $52.50 and kept the premium. The only loss is the upside you gave away.

Managing the trade before expiration

You do not have to wait. You can buy back the call at any time, which ends your obligation. Suppose the stock drops to $47 after two weeks and the call is now worth $0.20. Buying it back costs $20, and you keep $100 of the original $120. You are now free to sell the shares or sell a new call.

If the stock has run up and you want to keep the shares, you can roll: buy back the current call and sell a later one, often at a higher strike. That is two trades. Each has costs, and a roll that pays you a small credit can still leave you further from your upside. Treat it as a new decision, not an automatic fix.

Tax notes, briefly

This is general information from IRS Publication 550, not tax advice. Rules can change, so check the current year's publication.

• The premium is not taxed when you receive it. It sits in limbo until the call expires, is assigned or is bought back.
• If the call expires worthless, the premium is a short-term capital gain.
• If you buy the call back, the difference between what you received and what you paid is a short-term gain or loss.
• If you are assigned, the premium is added to the sale price of your shares. Whether that gain is short or long term depends on how long you held the shares.
• Calls that are deep in the money, or that are written with 30 days or less to expiration, may fail the "qualified covered call" test. Then the straddle rules can apply, which can defer losses and affect holding periods. If you sell covered calls in a taxable account, read that section of Publication 550 or ask a tax professional. See also Taxes for traders.

Who covered calls suit, and who they do not

They can make sense if you already own a stock, expect it to drift sideways or rise slowly, and would be happy to sell at a higher price. They make less sense if you own a stock because you think it could double. You would be selling that double for a small premium.

They do not reduce risk much. Covered calls are often among the first strategies a broker approves, because the risk is close to owning the stock, not because the risk is small. See Options approval and risks. If what you want is protection against a fall, read Protective puts and collars. The mirror image of this trade, selling puts to buy a stock, is in Cash-secured puts.

Try it

Pick a stock you would be comfortable owning and add it to the Watchlist. Buy 100 shares of it in the paper trading portfolio. Then open its options chain at your broker or any free quote site, choose a call with 30 to 45 days left and a delta near 0.30, and write in your trading journal:

1. The premium, and your max profit, breakeven and max loss using the formulas above.
2. What the stock would need to do for you to wish you had not sold the call.
3. The next earnings and ex-dividend dates.

On expiration day, compare your covered call result with simply holding the shares. Do this for three months before using real money.

Sources

• Options Industry Council (OIC): Covered call (buy-write)
• OIC: Options exercise FAQ (exercise by exception, assignment)
• IRS: Publication 550, Investment Income and Expenses (options, qualified covered calls)
• Investor.gov (SEC): An introduction to options