Naked vs Covered Options
When you sell an option, the one question that decides how much can go wrong is simple: is something already standing behind the obligation, or are you relying on borrowed buying power to hold it?
Selling an option (also called writing it) means you take on an obligation in exchange for a payment called premium. A short call obligates you to deliver 100 shares at the strike price if you are assigned. A short put obligates you to buy 100 shares at the strike price if you are assigned. The word covered describes whether you already hold something that satisfies that obligation. The word naked (or uncovered) describes the case where you hold nothing offsetting and lean on margin — borrowed buying power your broker requires you to set aside.
The covered positions
A covered call is long 100 shares plus one short call. If the stock climbs through the strike and you are assigned, you simply hand over the shares you already own. The shares cover the delivery, so there is no scramble to buy stock at a bad price.
A cash-secured put is one short put with enough cash set aside to buy 100 shares at the strike. If you are assigned, the reserved cash buys the stock. The cash covers the purchase. A cash-secured put is really nothing more than the fully covered version of a short put.
The naked positions
A naked call is a short call with no shares behind it. If you are assigned, you must buy shares in the open market at whatever price they trade and deliver them at the strike. Because a stock has no ceiling on how high it can go, the loss on a naked call is theoretically unlimited. This single fact is why naked calls are generally avoided by everyone except large, well-capitalized firms.
A naked put is a short put held on margin without the full purchase price reserved. The risk is large but bounded: the worst case is the strike falling all the way to zero, so the maximum loss is the strike price minus the premium collected, multiplied by 100. That is a real and sometimes severe number, but it is not infinite the way a naked call is.
| Position | Covered by | Maximum loss |
|---|---|---|
| Covered call | 100 long shares | Large (stock falls), reduced by premium |
| Cash-secured put | Reserved cash | Strike minus premium (stock to zero) |
| Naked call | Nothing | Theoretically unlimited |
| Naked put | Margin only | Strike minus premium (stock to zero) |
Worked example: same put, two ways
Suppose a stock trades at 50 dollars and you sell one put at the 45 strike for 1.50 in premium. One contract represents 100 shares, so you collect 150 dollars.
Run it as a cash-secured put. You reserve 4,500 dollars (45 times 100) the moment you open the trade. If the stock drops to 40 before expiration, the position shows an unrealized loss, but nothing forces your hand. The cash is already parked. If you are assigned, you buy the shares at 45 using money you set aside on purpose, and you can hold them calmly.
Run the identical put naked on margin. You did not reserve 4,500 dollars; your broker only held a fraction of it as a margin requirement. If the stock falls sharply to 40, the margin requirement on a short put rises as it moves against you. Your account may no longer meet that requirement, and the broker can issue a margin call — a demand to add funds or close the position — potentially before expiration and at the worst possible moment. The obligation is the same in both cases; what differs is whether you funded it in advance.
Calling a position covered does not make it safe or profitable. A covered call still loses money if the stock falls, and a cash-secured put still loses money if the stock falls below the strike. What coverage removes is the funding surprise — the forced sale, the margin call, the need to buy stock you cannot afford. It changes how the loss arrives, not whether it can.
Two more things to keep in mind
- Assignment can happen early. Standard options on individual US stocks are American-style, meaning the buyer can exercise at any time before expiration, not only at the end. A naked position can be assigned when you least expect it.
- Naked positions tie up buying power. The margin a broker holds against an uncovered short reduces what you can do elsewhere, and that requirement grows as the trade moves against you.
For more on how an obligation can be capped by the structure itself rather than by what you hold, see Defined vs Undefined Risk. For the broader mechanics of buying versus selling options, see the paid puts guide.
Educational only — not investment advice. Options involve a substantial risk of loss and are not suitable for every investor.