What is early assignment?
In one line: Early assignment is when the holder of an option you sold uses it before expiry, so you must buy or sell 100 shares at the strike earlier than you planned.
How it works
Most US stock options are American-style. The holder can use (Exercise) them on any trading day, not just at expiry. When they do, a seller is picked and assigned. If that happens before expiry, it's early assignment.
It's not random. A holder gives up any time value left when they exercise early. So it mostly happens when there's almost none to give up:
- Deep in the money options. The option is nearly all intrinsic value. See Deep in the money.
- Calls before an Ex-dividend date. If the dividend is bigger than the call's time value left, a holder may exercise the day before to collect the dividend.
- Puts deep in the money, where the holder would rather sell the shares now than wait.
An example (hypothetical)
XYZ trades at $50 (an illustration, not a trade idea). You sell a 30-day $45 put for $1.00 and collect $100. You plan to roll it if it gets close.
| Day | XYZ | What happens | Your result so far |
|---|---|---|---|
| 1 | $50 | You sell the put | +$100 |
| 12 | $36 | Bad news. Put deep in the money, almost no time value | −$900 + $100 = −$800 on paper |
| 13 | $36 | Assigned early. $4,500 leaves your cash. 100 shares arrive | −$800, now real |
| 30 | $33 | You still hold the shares | −$1,200 + $100 = −$1,100 |
Early assignment didn't create the loss. The stock falling did. But it took away your choices. You can't roll a put that's already been assigned. You now own shares, and they kept falling.
In the dividend case, the cost is different. Say you sold a covered call and counted on the dividend. If you're assigned the day before ex-dividend, the shares are gone and so is the dividend.
Why it matters for sellers
Plan as if early assignment can come any day once your option is deep in the money or a dividend is near. That means:
- Keep the cash ready. With a Cash-secured put, it's already set aside.
- Decide your line in advance. The price where you'd close the trade, before it's deep.
- Check the calendar. An ex-dividend date inside a covered call is worth a look the day before.
In the wheel strategy, being assigned on a put is part of the plan. Being assigned early on a stock that's still falling is the case to size for. Our early assignment explained guide covers the timing and notices.
Questions
How likely is early assignment?
For options with plenty of time value left, it's uncommon. It gets likely when the option is deep in the money or a dividend makes exercising worth it.
How will I know I was assigned early?
Your broker sends a notice, usually by the next morning, and the shares or cash change in your account. Check your positions daily when a trade is in the money.
Can early assignment happen on index options?
Many index options are European-style and can only be exercised at expiry. Check the contract's style before you trade.
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