What an FX Option Actually Is

A right, not an obligation

An FX option gives its buyer the right to exchange one currency for another at an agreed rate, on or before an agreed date, and no duty to do it. That asymmetry is the whole product. If the market has gone the other way the buyer lets the contract lapse and is out only what they paid for it; if it has gone their way, the right is worth using. The seller holds the mirror position and has no choice in the matter: they took a payment in exchange for standing ready to deliver, and they deliver if asked. Everything else about options — the pricing, the hedging, the vocabulary that surrounds them — is machinery built around that one asymmetry.

The four terms that define the contract

Four things, plus the currency pair, say what an option is. The strike is the rate the holder may deal at. The expiry is when the right ends, and it ends at a stated cut, a fixed point in the day named in the contract rather than at midnight or at the close of any particular session. The notional is the amount the contract covers. The exercise style says whether the right can be used only at expiry or at any moment before it. Change any one of those and it is a different contract at a different price, which is why quotes are always given against a full set of terms and never for "an option on the pair".

What the premium buys

The premium is the price of the right. It is paid up front and it is not returned. It splits into two parts that behave differently. One is the advantage the strike already carries over the current market rate, which tracks the market and nothing else. The other is what the market charges for the possibility that more advantage arrives before expiry, which shrinks as time runs out and expands when more movement is expected. That second part is why an option that would be worthless if exercised today still has a price, and why two contracts identical in every term but expiry cost different amounts.

Where these contracts actually trade

Most currency options are agreed over the counter, directly between banks and their institutional clients; the rest trade on exchanges as listed contracts. The difference decides what you can find out. A listed market publishes its specifications, its settlement prices and its open interest. The over-the-counter market publishes none of that, because there is no venue to do the publishing — prices are quoted by dealers to their own clients. This is why option pricing is discussed in commentary in general terms and almost never with a number anyone outside can verify, and why the first question about any figure is which of the two markets it came from.

How a contract ends

An option that is not exercised expires, and nothing happens beyond the premium already paid. An exercised one settles in one of two ways, and the contract says which. Deliverable settlement means the two currencies are genuinely exchanged at the strike, on the settlement date the contract names. Cash settlement means no currency changes hands at all: one side pays the other the difference between the strike and a reference rate. Which reference, and the moment it is taken, are contract terms rather than conventions to guess at. For currencies subject to transfer restrictions, cash settlement against a published fixing is often the only form available.

Whether any of this is within reach

Options are an institutional market first. Whether a particular retail account can trade them depends on two things that are both written down somewhere: the broker's instrument list, which says what is actually offered, and the client's regulatory category, which affects what may be offered at all. Some brokers offer no options; some offer products that borrow option-like language for something structurally different. The safe assumption is that none of it is available until the broker's own documents say otherwise, and the terms of anything that is on offer sit in its contract specification rather than on the page advertising it.

What to read before believing a specific claim

Everything above is structure, and structure is stable. The specifics are not. Contract sizes, expiry cuts, settlement references, available strikes and the last day a contract trades are set by whoever issues it and published by them: an exchange in its contract specification, a dealer in the terms it sends its client, a broker in the documents behind its instrument list. Those are the sources for any number, and each of them can change what it publishes by announcement. A specification quoted from a secondary summary of unknown age is describing a contract that may no longer be the one on offer.