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My option expired in the money by one cent. Now I own shares?

Yes, most likely. Options that finish a cent or more in the money are usually exercised automatically. Here's what that means on Monday, and the cheap habit that avoids it.

Options guide · 8-minute read · Updated 2026-10-26

What happened

Your short option finished one cent on the wrong side of the strike. Over the weekend, it was exercised. Now you either own 100 shares (from a put) or your 100 shares are gone (from a call).

That's not a glitch. It's how US stock options work. An option that ends $0.01 or more in the money is normally exercised automatically, unless the owner tells their broker not to. A penny is enough.

And the stock price on Monday can be very different from Friday's close.

How auto-exercise works, in plain words

The clearing house that stands behind listed options uses a rule often called "exercise by exception." At expiry, any option in the money by at least a cent is exercised for the owner, unless they opt out.

So a put buyer whose $50 put closed with the stock at $49.99 usually gets it exercised. Someone on the other side gets assigned. If that's you, you buy 100 shares at $50.

Two details make this messy:

• The owner can choose not to exercise. A buyer might skip a penny-in-the-money option. You won't know until after the fact.
• The stock can move after the close. Buyers can decide for a short time after the bell, based on after-hours prices. Brokers set their own cutoffs; check yours.

This uncertainty near the strike has a name: Pin risk. Our guide on pin risk goes deeper.

The numbers (an illustration, not a trade idea)

A made-up stock, XYZ, traded at $53. You sold a 30-day $50 put for $1.00 and collected $100.

On expiration Friday, XYZ closed at $49.99. One cent in the money. On Friday afternoon, the put was quoted at $0.03 to $0.07. You let it ride.

Over the weekend you were assigned. You now own 100 shares at $50. Your cost after the premium is $49. Then the company reported bad news on Sunday. Monday, XYZ opened at $46.

The middle row is the close-for-pennies trade. You paid $7 to close. You kept $93 of the $100. Whatever happened over the weekend didn't touch you.

The top row is the one people remember. A penny decided whether you owned the shares. The weekend decided what they were worth. You lost $300 on a trade that looked like a win at 3:59 pm on Friday.

The covered-call version works the same way in reverse.

You own 100 shares and sold a $50 call. XYZ closes Friday at $50.01. Your shares are called away at $50. Monday, XYZ opens at $54.

You didn't lose money on the shares, but you sold them for $50 and they're worth $54. If you wanted to keep them, buying back costs $5,400 now. That's $400 more than you got for them. Being called away by a penny can cost you your position.

The close-for-pennies rule

Here's the habit that makes this rare:

On expiration day, if your short option is within about a dollar of the strike and you can buy it back for a few cents, close it.

• A few cents to close is the cheapest insurance you'll find for a weekend gap.
• It removes the guessing about whether the buyer will exercise.
• It frees your cash or shares to use again on Monday.

Some sellers close any option worth less than a set amount, like $0.05 or $0.10, as soon as it gets there, not just on Friday. Pick a number and write it in your rules.

When letting it expire is fine

Letting an option expire works well when it's clearly out of the money. A put at $50 with the stock at $56 at the close isn't the problem.

It's the near-the-strike ones that bite. If the stock is close enough that a normal after-hours move could flip it, close it or decide you're happy with either result.

If assignment is what you want, letting it ride is fine. That's part of the wheel strategy. Just make it a choice, not a coin toss.

What to do now

1. Check what you own. Shares in, or shares out, and at what price.
2. Write your real cost: strike minus premium.
3. If you were assigned shares you still want, run the calm checklist in I got assigned on a Friday and panicked before you sell anything.
4. If you were called away from shares you wanted, decide if you'd buy them back at today's price. If not, let them go.
5. Add the close-for-pennies rule to your journal, with your number.

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