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What is a covered call, in plain words?

A covered call is owning shares and selling (writing) a call on them 1. You collect the call's premium now; in return, if the stock ends above the strike, your shares are likely to be called away at the strike 1. The most it can make is the strike minus what you paid for the shares plus the premium, and its break-even is the share price minus the premium 1.

100 shares bought at $50, and a $52 call with 30 days left sold against them at 30% implied volatility (made-up numbers). Move where the stock ends at expiry.

Source: the StrikePath engine, pricing with the Black–Scholes formula 2 at 4.3% interest a year; a simulated example, not market prices. For learning; not advice.

The trade-off

The call above sells for $0.99 a share by the formula 2, $99 a contract. So the most this can make is $52 − $50 + $0.99 = $2.99 a share, and it loses only below $49.01 1. The shares still carry their risk: the worst case is the stock falling to nothing, softened only by the premium 1.

Time is on the seller's side

All else equal, passing time helps a covered call, as the call sold loses time value 1.

What this shows, and what it doesn't

The result at expiry, a share, before fees and the bid-ask spread. A call sold without the shares behind it is a different trade, whose loss can have no limit if the stock rises 3. Options on US stocks are American-style: the call's buyer can exercise at any time before expiry, so the shares can be called away early, though most exercises come on or near expiry 4. The day before the stock goes ex-dividend is the usual exception, and early assignment then takes the dividend from the call's writer 1.

Go further

What is a call option? →The right to buy, in plain words.What is a protective put? →The other common way to pair options with shares.
Sources (4), checked 20 October 2026 and 27 October 2026
  1. The Options Industry Council, “Covered Call (Buy/Write)”. Read it (read 27 October 2026)
  2. Fischer Black and Myron Scholes, “The Pricing of Options and Corporate Liabilities”, Journal of Political Economy 81(3), 637–654, 1973. Read it (read 20 October 2026)
  3. CME Group, “Covered Calls” (Option Strategies course). Read it (read 27 October 2026)
  4. FINRA, “Trading Options: Understanding Assignment” (14 December 2020). Read it (read 27 October 2026)

Now try it on a scenario of your own

Pick where a simulated stock might be, and by when: drag one dot and see, side by side, what buying shares, one option, or a pair of options (a call or put spread) would each do. Free, no sign-up.

Check a trade before you make it →