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Assignment on expiration Friday, hour by hour
On expiration Friday, the 4 pm ET close decides whether your option is in the money. Anything $0.01 or more in the money is usually exercised automatically. After-hours moves can still change what a buyer does, and you find out over the weekend.
The timeline
| Time (ET) | What happens |
|---|---|
| 9:30 am | Last trading day opens. Your option can still be closed or rolled. |
| During the day | Options near the strike swing hard; small stock moves flip them in and out of the money. |
| 4:00 pm | Stock market closes. The official closing price decides in-the-money or not. Most brokers stop accepting option orders at or just before the close. |
| 4:00–~5:30 pm | Option holders can still send exercise or do-not-exercise instructions to their broker. Many brokers set earlier cutoffs. The stock keeps trading after hours. |
| Evening | The clearing house (OCC) auto-exercises options $0.01 or more in the money, unless told otherwise. Exercises are assigned to brokers, who assign them to customers. |
| Saturday morning | Most brokers post assignment notices. Expired options disappear. |
| Monday 9:30 am | Shares and cash are in your account. Their new risk starts here. |
The key point: your option's fate is decided at 4 pm Friday, but you usually learn it Saturday and live with it Monday.
A worked example where Monday hurts (an illustration, not a trade idea)
You sold a $45 put on a made-up stock, XYZ, for $1.00 ($100). On Friday at 3:55 pm XYZ trades at $45.30. Thirty cents out of the money. You decide to let it expire.
4:00 pm: XYZ closes at $45.10. Still out of the money. By the standard rule, it expires worthless.
4:45 pm: XYZ reports a problem after hours. The stock drops to $41 in after-hours trading.
A put holder can still send an exercise instruction until their broker's cutoff. Buying 100 shares at $41 after hours and putting them to you at $45 is a $400 gain for them. Some will do it.
Saturday morning: your notice says you were assigned.
Monday open: XYZ opens at $40.
| Line | Cash |
|---|---|
| Premium | +$100 |
| 100 shares bought at $45, worth $40 | −$500 |
| Monday's position | −$400 |
At 3:55 pm Friday this trade was a $100 win. Monday it's a $400 loss, and you own a stock that just gapped down. That's a math example, not a promise. It's also rare: the holder had to act fast, and most brokers' cutoffs are early. Rare isn't never.
Had you bought the put back at 3:55 pm for about $0.10, you'd have kept $90 and owned nothing on Monday.
The same thing on a covered call
The late move can cut the other way. Say you own 100 XYZ bought at $50 and sold a $55 call for $1.00. At 4 pm XYZ closes at $54.80, twenty cents under the strike. The call should expire.
At 4:30 pm good news lands and XYZ trades at $59 after hours. A call holder can still exercise, buy your shares at $55 and hold stock worth $59. Saturday's notice says your shares are gone.
| Line | Cash |
|---|---|
| Shares sold at $55 (bought at $50) | +$500 |
| Premium | +$100 |
| Your result | +$600 |
| What holding the shares through the jump was worth | about +$900 |
No loss on paper, but about $300 of the jump went to someone else, and you're in cash on Monday instead of holding a stock you liked. If the shares mattered to you, buying the call back Friday afternoon for a few cents was the cheap fix.
The three Friday rules
- In the money at 4 pm means assigned. Don't hope for anything else. If you don't want shares (or don't want to lose them), act before the close.
- Near the strike means uncertain. Within about 1% either way, after-hours news can flip a buyer's decision. A few cents to close ends the uncertainty. See letting an option expire worthless.
- Your broker's cutoff is earlier than the OCC's. Many stop option orders before 4 pm and stop exercise instructions well before 5:30 pm. Read your broker's expiration page once.
What Saturday's account shows
Expired options are gone. Assigned ones are replaced by shares (a put) or cash (a call). The notice and the activity line are described in what assignment does to your account. Nothing settles until Monday, but your buying power usually updates Saturday.
If you had several contracts, check the count. Partial assignment on expiry is possible.
Where this fits the wheel
The wheel strategy treats assignment as a planned step, not an accident. That only holds if the strike was a price you wanted. The Friday risk isn't assignment itself; it's being assigned after a late move you didn't plan for. For the ways to sidestep it, read how to avoid assignment.
Questions
What time are options assigned on expiration Friday?
The 4 pm ET close decides in-the-money status. Auto-exercise happens that evening, and brokers post notices overnight, usually by Saturday morning. Shares and cash show up for Monday's open.
Can I be assigned if my option is out of the money at the close?
Rarely, yes. Holders can still send exercise instructions for a while after the close, and an after-hours move can make exercising worth it. Closing a near-the-money option before 4 pm removes that chance.
When does my broker stop accepting option orders on Friday?
It varies. Many stop at or shortly before the 4 pm close, and some apply earlier cutoffs on expiration day. Check your broker's expiration rules.
What happens if I'm assigned and the stock gaps down Monday?
You own the shares at the strike and the loss is yours from the open. The premium is a small cushion. This is why many sellers close near-the-money options for pennies on Friday rather than let them ride.
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