What is a naked call?
In one line: A naked call is a call option you sell without owning the 100 shares behind it, so if the stock rises there is no limit to what you can lose.
How it works
When you sell a Call option, you promise to sell 100 shares at the strike if the buyer asks. A Covered call keeps those shares in your account, so the promise is already paid for. A naked call doesn't. You'd have to buy the shares at whatever the market price is, then hand them over at the strike.
A stock can rise without limit. So the cost of that promise has no top. That's the whole problem, and it's why "unlimited risk" is the phrase stuck to naked calls.
Brokers know it. Naked calls need a margin account, the highest options approval level, and a hold on buying power that grows as the stock rises. Nothing in the wheel strategy uses them. The wheel's calls are always covered by shares you own.
An example (hypothetical)
XYZ trades at $50. You own no shares. You sell one 30-day $55 call for $1.00 and collect $100 (an illustration, not a trade idea).
Two weeks later, a bigger company offers to buy XYZ for $80 a share. The stock jumps to $80 overnight.
| XYZ at expiry | What happens | Shares | Premium | Total |
|---|---|---|---|---|
| $45 | Call expires | — | +$100 | +$100 |
| $55 | Call expires or is exercised at the line | $0 | +$100 | +$100 |
| $60 | You buy 100 at $60, sell at $55 | −$500 | +$100 | −$400 |
| $80 | You buy 100 at $80, sell at $55 | −$2,500 | +$100 | −$2,400 |
| $100 | You buy at $100, sell at $55 | −$4,500 | +$100 | −$4,400 |
The buyout did it. You collected $100 and lost $2,400, 24 times the premium. There was no price where the losses had to stop. If XYZ had gone to $120, the loss would be $6,400.
Compare the covered version: own 100 shares at $50 and sell the same call. At $80, the shares gain $500 to the strike, plus the $100. Capped at +$600, but never a loss on the rise. A math example, not a promise.
Why it matters for sellers
Every other wheel trade has a worst case you can write down. A short put can lose the strike times 100. A covered call can lose what the shares cost. A naked call can lose any number. You can't size a trade whose worst case is "any number".
The margin hold also moves against you. As the stock rises, the broker demands more buying power for the same call. In a sharp rally that demand and the loss arrive together, and the broker may close the position at the worst moment.
If you ever want to sell a call, own the shares first. If you want to bet on a stock not rising with a fixed worst case, a call spread (buying a higher call against the one you sell) caps the loss, though it caps the premium too.
Questions
Why is a naked call unlimited risk?
Because you must deliver shares you don't own at the strike, and there's no ceiling on what a stock can cost to buy. The loss grows with every dollar the stock rises.
Is a covered call also a naked call?
No. A covered call is backed by 100 shares you already own. If assigned, you hand them over. A naked call has no shares behind it.
Can beginners sell naked calls?
Almost never. Brokers restrict them to margin accounts at the top approval level, and many retirement accounts ban them. Even then, there's no reason to start there.
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