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Partial assignment: when 2 of your 5 contracts are assigned

If you sold several contracts, you can be assigned on some and not others. Assignment is matched one contract at a time, often at random, so 2 of 5 is a normal result. You get 200 shares and still have three short puts to manage.

Options guide · 7-minute read · Updated 2026-10-26

Why it happens

When a buyer exercises, the clearing house assigns that exercise to a broker, and the broker assigns it to one of its customers who sold that option. The broker's method is usually random, or first-in first-out, and it works per contract.

So if you sold five contracts and only two exercises land on your broker's customers, you might get both, one, or none. At expiry, if the option is in the money, every contract is usually exercised and you'll get all five. Partial assignment is mostly an early assignment event, or an expiry-day event when the option is barely in or out of the money and holders made different choices.

A worked example (an illustration, not a trade idea)

A made-up stock, XYZ, traded at $50. You sold five 45-day $45 puts for $1.00 each ($500 total). $22,500 is set aside.

Three weeks in, XYZ drops to $37. The puts are deep in the money with little time value. Overnight, two are assigned.

Position check at $37:

What's left, and what to do with each piece

You now have two positions where you had one.

The 200 shares. True cost $44 each. Treat them as you would any assigned shares: decide if you'd still own the company at $37, and if so, whether a covered call above your cost pays anything. At $37, a $44 call is far out of the money and may pay pennies. Patience, or selling the shares, are the real choices. See what assignment does to your account.

The 3 open puts. They're deep in the money and can be assigned any night. Your choices are the same as for any short put under water: take assignment (you'll own 500 shares), buy them back (about $2,430 to close), or roll down and out. Don't let the fact that two were already assigned change the maths on the other three.

Keep the two pieces in one journal entry. They're one trade that went wrong, not a stock position and a separate option position.

Selling calls on part of a position

Calls work per 100 shares too. With 200 shares you can sell two covered calls, not five. If the other three puts are assigned later, you'll hold 500 shares and can sell five.

Say a $44 call pays $0.15 with XYZ at $37. Two calls bring in $30. That lowers your true cost from $44 to $43.85 a share. It's something, but next to a $1,600 paper loss on the shares it's close to nothing.

Don't sell calls on shares you don't hold yet. Five calls against 200 shares means three of them are naked calls, with no shares behind them. That's a far riskier trade than anything on this page.

Why five contracts was the mistake

Partial assignment feels confusing, but it isn't the problem. The problem in the example is size: five puts meant $22,500 promised on one stock. Two assignments and three open puts is just that size showing up in two forms.

One or two contracts per name keeps this simple and survivable. The wheel strategy doesn't need five contracts to work; it needs the stock to be one you'd hold.

If it happens on expiration Friday

Near the strike at the close, holders can make different choices. Three might exercise and two might not. Saturday's account could show 300 shares and no puts at all, with the other two having expired. Check the count before you assume anything, then plan the covered calls on whatever you actually hold.

Questions