What Actually Happens When Your Call Expires In the Money

Expiration day mechanics catch more traders off guard than almost anything else in options — not because the outcome is bad, but because nobody explained it in advance.

Two paths, depending on your buying power

If you hold an in-the-money call through expiration with enough buying power, it simply auto-exercises: you buy the underlying stock at your strike price. Straightforward.

Without enough buying power, most brokers — Webull included — will typically auto-liquidate the option itself before market close, rather than force you into a stock position you can’t actually pay for. Some call this a “backdoor cash settlement.” You don’t get stuck owning shares you can’t afford, but you also don’t get a clean, formal settlement process — the broker just sells the option on your behalf, and you keep the intrinsic value, minus fees. The end result is similar to what you’d get by closing the position yourself.

A worked example

Say you’re holding a €100 strike call, and at expiry the stock sits at €120 — €20 in the money.

• Without €10,000 to buy 100 shares: the option would auto-exercise into 100 shares at €100, which creates a margin deficit the broker doesn’t want sitting on their books. So the broker auto-sells the shares at roughly €120.
• Net result: €12,000 in sale proceeds minus €10,000 purchase cost = €2,000 in cash, minus fees — essentially the same outcome as selling the option directly at expiry, just with a few extra steps and a bit of extra risk baked in.

That extra risk is real: if the market gaps down between the expiry close and the broker’s liquidation, your execution price can come in worse than expected, and fees or interest can quietly eat into the profit. Not every broker handles this identically — some liquidate the option before expiry rather than after.

Take the decision back from the broker

To sidestep the ambiguity entirely, enable “Do Not Exercise” (DNE) if your broker offers it. Even with DNE selected, the broker may still liquidate the option to limit account risk — but it gives you more predictability than leaving the default behavior in place.

A simple rule covers almost every case: only let a call exercise into stock if all four of these are true — you have the cash to buy and hold the shares, you genuinely want to hold the stock, it’s in the money, and you expect a modest upward move ahead. If any one of those isn’t true, sell the option yourself and buy the stock separately if you still want the exposure.

The safest move is almost always the boring one: sell an in-the-money call yourself, before expiration, and choose your own price and timing — instead of leaving it to broker mechanics and an overnight gap.