- Physically settled options deliver the underlying shares when exercised, and exercise is not something the contract performs on its own.
- US listed equity options run on the OCC's exercise-by-exception procedure, which exercises contracts $0.01 or more in the money unless the clearing member instructs otherwise, so the expiry default is a standing arrangement between firms rather than a term of the contract you hold.
- Binance's Stock Options, live 1 September 2026, invert that default by auto-liquidating unmanaged positions on a best-efforts basis after a cutoff 30 minutes before expiry, which is why the expiry procedure has to be read before the strike is chosen.
A call that finishes ten dollars in the money can pay you or cost you the entire premium, and the contract itself says nothing about which one happens.
Picture that same call sitting in two accounts. Same ticker, same strike, same Friday. The first holder does nothing and starts Monday owning a hundred shares. The second holder does nothing and finds the position was worked into whatever bid was still standing in the closing minutes, or not sold at all, which is the worse of the two outcomes. Neither of them broke a rule or misread a chart. They learned the identical payoff diagram from the identical kind of options course, and the diagram was accurate for both of them.
The difference sits in a sentence neither of them read.
This one follows Tao, Kodex's bridge between structure and instinct, through the machinery that writes that sentence: what settlement type commits you to, what the expiry default actually is, and which firm in the chain gets to pick it. Lilith is in the room for the half where the shares become real. Twenty years in cybersecurity taught her to ask one question about any system once the drama leaves, and it is the same question here. Who is holding the thing?
Tao starts where the courses stop.
What physically settled options actually deliver
The payoff diagram is a picture of value. It is not a picture of what arrives.
A cash-settled option resolves into a number. It finishes in the money, the difference lands in the account balance, and nothing changes hands that you could hold. Index options work this way because there is no basket of the S&P 500 to hand over. A physically settled option resolves into the asset instead. Exercise a call and the shares arrive; exercise a put and you deliver them.
Tao draws the same diagram twice and points at the part that does not move. Strike, premium, breakeven, the hockey stick bending in the same place both times. "Both of these are correct," he says. "They describe what the position is worth. Neither of them tells you whether you finish holding money or holding stock, and that second thing is what your account has to be able to absorb."
Lilith wants the object located before anyone talks about value. "If it is shares," she says, "then they are sitting somewhere, in a name, under a rulebook. Which one?"
Tao holds that back for now, because there is a neighbouring distinction that gets tangled with it constantly. What a contract settles in is a currency question, and crypto options settle in USD or in the coin itself depending on how they are written. What a contract settles as is this one. Same word doing two jobs, and only one of them ends with something in custody.
That contrast lands hardest against the crypto-native version of the product. A perp option settles against the exchange's own index, and nobody anywhere in that chain is holding the share. Here, somebody is.
What happens if you don't exercise an option at a US broker
Something has to happen to an in-the-money option at expiry, because walking away from it is not a neutral act. The US listed market settled that question decades ago with a procedure called exercise by exception, run by the Options Clearing Corporation.
That procedure is plain enough to check against your own position. The OCC's investor education material describes it as an administrative procedure to expedite the exercise of expiring options by clearing members: equity options that finish $0.01 or more in the money in a customer account get exercised unless somebody says not to. One cent. That is the entire threshold, and it is why silence at a US broker usually pays you.
"Usually" is carrying real weight in that sentence, and the clearinghouse says so itself.
That page also corrects a habit the industry has never dropped: "Individuals sometimes incorrectly refer to the 'exercise by exception' procedure for expiring options as 'automatic exercise.'" The procedure "always allows an OCC clearing member to make a choice not to exercise an option that is in-the-money by the exercise threshold amount or more," and the thresholds trigger exercise "only in the absence of contrary instructions from the clearing member." The industry has spent decades calling it automatic and the clearinghouse has spent the same decades correcting them, which tells you roughly how much force a correction carries against a convenient word.
Read it twice and the $0.01 stops looking like a promise made to you. It is a default setting on somebody else's system, and a default is a thing the system's owner can override.
Tao puts it in the plainest form he has. "The exchange listed the contract. The clearinghouse settles the contract. But the thing deciding what your silence means is a standing arrangement between two firms, and you are not either of them."
Who is choosing that default on your behalf?
Follow the instruction backwards and it passes through four hands. You hold the option in an account. The account sits at a broker. That broker is either an OCC clearing member or clears through one. The clearing member faces the clearinghouse, and the clearinghouse is the entity that actually performs the exercise.
That default lives in the middle of the chain, at the clearing member. Not at the exchange that listed the contract, and not with you.
There is a second override further down that catches people out. A broker can decline to exercise a call when the account cannot pay for the shares it would deliver. The option is in the money, the threshold is cleared, and the exercise still does not happen, because a hundred shares of a $600 stock is a $60,000 purchase and the account holds $4,000. Nothing about that is a malfunction. It is a firm declining to extend credit it never agreed to extend.
Lilith has met this shape in a different industry. "Every system has a component everyone treats as inert," she says. "It is never inert. It has an owner, the owner has an interest, and the interest shows up on the day the thing is under load."
Which is the argument for reading the licence before the interface. The rulebook an asset sits under decides what protects it, and the expiry default is that lesson one notch further in. The rulebook does not only set your protections. It writes your defaults, and it writes them for the days you are not paying attention.
The same contract, the opposite default
On 1 September 2026 the second version of that sentence went live, printed in the product's own launch material.
Binance listed physically settled options on more than 1,000 US-listed stocks and ETFs for eligible users outside the United States. Regular trading runs 09:30 to 16:00 ET, with certain ETF options extending to 16:15. Exercise requests can be submitted up to thirty minutes before expiry. And then the sentence that matters: "If you do not submit an exercise instruction before the cut-off, your Stock Option will be subject to auto-liquidation, meaning that your position will be sold on a best-efforts basis before the close of trading." That release also warns that a Stock Option "may expire without value and you may lose the entire Premium paid."
None of that is buried. It is written down, in the launch announcement, in the paragraph where the exercise terms live. What breaks is the habit built somewhere else, because the inversion is total: at a US broker, doing nothing with a deep in-the-money call converts it into stock, and here, doing nothing sells it, on best efforts, into the last minutes of a session.
Tao is careful about what that does and does not mean. "It is not worse," he says. "A venue that will not front you sixty thousand dollars of stock on a silent instruction has a defensible reason not to. What it is, is opposite. And whatever you learned to expect, you learned on the other one."
Both of your exits are conditional
Lilith asks the question that decides how much of this actually matters. "So what can you do about it, in the account, on the day?"
Two things, and each one arrives with a condition attached.
The first is to get out before expiry. Phase 1 of the product permits buying calls and buying puts only, with writing and short exposure unavailable, and supports limit orders only. Market orders do not exist yet. Any exit order you place is therefore a price you name into whatever book has formed on a product that is days old, and it fills or it does not.
The second is the fallback, which is the auto-liquidation itself. A best-efforts sale is not a price guarantee and was never presented as one. You do not choose the moment, you do not choose the level, and the release states plainly what happens when the bid is not there: the option can expire without value.
| Doing nothing at expiry | What you get | What you still control |
|---|---|---|
| US listed equity option, at a broker | Exercised at $0.01 in the money unless the clearing member instructs otherwise, and shares settle into the account | The instruction, and whether the account can fund the shares |
| Binance Stock Options, Phase 1 | Sold on a best-efforts basis before the close, or expires without value | A limit order, and a cutoff thirty minutes before expiry |
| Cash-settled index option | The in-the-money amount arrives as cash | Nothing needs doing |
What you control is thinner than it looks in every case but the last. A limit order can sit unfilled all afternoon, and a thirty-minute cutoff can pass while you are asleep in a timezone the New York session was never built around. Both exits are real, and neither is yours to guarantee.
Exercising moves your shares to a firm you never signed with
This is where Lilith stops asking and starts tracing.
Exercise on this product does not end at the exchange you logged into. Nest Trading Limited acts as introducing broker and routes orders to Alpaca Securities LLC, doing business as Alpaca Clearing, a US-registered self-clearing broker-dealer handling execution, clearing, settlement and custody. When a call is exercised, the shares are held in custody by Alpaca on behalf of the account holder.
Watch what that single instruction does to the position. Before exercise you hold a contract with an offshore crypto exchange. After it you hold a beneficial interest in shares sitting at a US broker-dealer where you have never opened an account, never signed a customer agreement, and never seen a login screen. Two firms, two rulebooks, one click submitted thirty minutes before a bell.
Lilith is not making an accusation and says so first. "The disclosures answer more than people expect. They name the introducing broker. They name the clearing firm. They say the shares are held on your behalf, which is more than a lot of products bother to tell you." Then the other half of her question. "What I want is the part every custody arrangement stays quiet about until it is tested. What the process is for moving those shares somewhere else. What happens to them if the relationship between the two firms ends. Where you file, and under whose law, when the answer you get back is no."
Those questions have answers somewhere. They live in the second firm's rulebook rather than the first one's, and you acquired that relationship by not cancelling a contract.
It is the same lesson a delisting calendar teaches from the other direction: a venue's timetable can act on a position you assumed was yours to time. Custody moves that way too, quietly, on a date, according to a document agreed to at signup. Every market runs on somebody else's off switch. The useful skill is not indignation about that, it is knowing whose hand is resting on it and what that hand has committed itself to doing when no instruction arrives.
Read the expiry procedure before you pick the strike
The OCC page that corrects the "automatic exercise" habit closes in capital letters, which is not a register clearinghouses reach for casually. Customers should communicate explicit instructions to exercise, or not exercise, any expiring option contract.
That advice is older than the product it now applies to, and it is the part that travels. A contract has a payoff and a venue has a procedure. The payoff is standardised and moves with the contract wherever it is listed; the procedure is written locally, by the firm holding your position, and stays behind.
So the habit is small enough to carry anywhere. Before you hold anything into an expiry, a cutoff, a delisting date or a lockup end, go and find the sentence describing what happens if you do nothing. It exists. Somebody wrote it, and they wrote it with their own operational interest in mind as much as yours, which is fine as long as you have read it.
Tao's version is shorter, and he has said it enough times to have it down to one line. "Learn the diagram second. Learn the exit first."
Open the simulator and, before you size a single position, go hunting for the sentence that tells you what happens if you walk away from it. Kodex runs on simulated balances, so the first time you get that answer wrong it costs you the lesson and nothing else.
