A binary option links its payoff to a yes/no condition, such as whether a currency pair will finish above a stated exchange rate at a stated time. In the common cash settlement model, a correct prediction produces a fixed payment. An incorrect prediction can mean losing the entire amount paid for the contract.
The difficult part is not choosing between two answers. It is judging the condition, the deadline and the payout together. Being broadly right about a market’s direction may still produce a losing trade.
For UK retail readers: the sale, marketing and distribution of binary options in or from the UK to retail clients is prohibited. The ban took effect on 2 April 2019 and remains in the FCA rules on retail binary options. The examples below explain the contracts, rather than recommend trading them.
What You Actually Buy With a Binary Option
A binary option is a contract linked to an underlying asset or reference value. That reference might be a share price, currency exchange rate, commodity price or stock index level. Buying the contract does not mean buying the asset itself.
A binary option based on gold does not give you gold, and one based on a company’s shares does not make you a shareholder. The cash settlement depends on whether the contract’s condition is satisfied. Exercise is automatic rather than a separate decision for the buyer, as set out in the SEC investor guidance on binary option mechanics.
To read a binary contract properly, separate five details:
- Underlying reference: the asset, index or other value being measured.
- Strike or threshold: the level against which that value is tested.
- Expiry: the deadline for the condition, including the relevant time zone.
- Purchase cost or stake: the amount paid and potentially lost.
- Settlement terms: the winning payment, losing payment and rules for determining the outcome.
Those details turn a vague prediction into a contractual question. “Gold will rise” is not enough. “Will the stated gold reference price be above $2,400 at 3pm?” identifies both the threshold and the deadline.
The threshold also need not equal the market price when the contract is purchased. A price could rise after purchase yet still finish below a higher threshold. In that case, a prediction of “above the threshold” would lose despite the upward movement.
A Binary Options Trade Worked Through
Consider a hypothetical contract based on EUR/USD. All times use the same time zone, and the example ignores fees. Its terms are:
At 2pm, a buyer pays £100 for a contract that wins if the designated EUR/USD settlement value is strictly above 1.1000 at 2:05pm. A winning contract returns the £100 stake plus £80 profit. A losing contract returns nothing.
The advertised profit rate in this example is 80%. That does not mean an 80% probability of success. It means £80 profit for each £100 staked if the condition is satisfied.
| EUR/USD settlement value | Condition satisfied? | Total returned | Net result |
|---|---|---|---|
| 1.1001 | Yes | £180 | £80 profit |
| 1.1050 | Yes | £180 | £80 profit |
| 1.0999 | No | £0 | £100 loss |
| 1.1000 | No, under these terms | £0 | £100 loss |
The first two rows show the fixed payoff. Finishing much further above the threshold does not increase the payment. The third row shows the reverse: missing the threshold by a small amount still loses the entire stake.
The final row matters because “above” is different from “at or above”. In this example, equality loses. Do not assume that an exact match means a refund; the written settlement rule must answer that question.
Also distinguish the amount returned from the profit. Receiving £180 after paying £100 creates an £80 gain, not a £180 gain. A large number on a settlement screen can include money that was yours before the trade began.
Why Expiry and the Settlement Price Matter
For a contract assessed at expiry, an earlier favourable movement is not enough. Suppose EUR/USD reaches 1.1003 at 2:04pm but the designated settlement value is 1.0999 at 2:05pm. The example contract loses. A recovery to 1.1010 a minute later would not change that result.
This is why a market forecast and a binary options forecast are different tasks. A view that the euro will strengthen during the afternoon does not answer whether it will be above one threshold at one particular minute.
The settlement value must also come from the method named in the contract. An unrelated chart is not a substitute. As a concrete example, CME’s COMEX event contract rules use the exchange-calculated daily settlement price of a designated futures contract. They also distinguish a call’s “strictly above” condition from a put’s “equal to or less than” condition.
When examining a contract, ask which instrument supplies the reference value, who calculates it and when it is measured. Check the treatment of missing data or disrupted trading too. Without those details, there is no clear way to independently check the result.
A screenshot taken just before expiry cannot, by itself, establish that a contract should have won. It would need to show the correct reference, measurement time and settlement method.
Why Winning Half the Trades Can Still Lose Money
Two possible outcomes do not automatically mean equal probabilities. Nor do they mean equal financial consequences.
Using the £100 stake and £80 profit example, five wins produce £400 profit. Five losses cost £500. Across those ten trades, the net result is a £100 loss, even though half the predictions were correct.
With an unchanged 80% profit rate, equal stakes, no refunds and no fees, the break-even win rate is about 55.56%. That is an arithmetic threshold, not a forecast of what a trader can achieve. Costs would raise the required rate.
A higher percentage payout does not establish that one contract is better value than another. The condition might also be harder to satisfy. A useful comparison needs both the potential payment and a defensible estimate of the chance of receiving it.
The separate guide to binary options payouts and break-even win rates covers the calculations in more detail. For the mechanics, the main distinction is simple: a winning payout is conditional, not a promised investment return.
Not Every Binary Contract Tests the Same Event
A high/low contract tests whether a reference value finishes above or below a threshold. Other structures change the condition while retaining a fixed payoff.
A touch contract can depend on a level being reached during the observation period, rather than where the price finishes. A range contract can depend on the final value falling between two boundaries. A ladder contract can use a threshold different from the starting price. These distinctions appear in ESMA’s analysis of binary contract structures.
Consider a price that starts at 100, reaches 105 and finishes at 102. A hypothetical contract requiring it to touch 105 could win, while another requiring it to finish above 105 would lose. A third requiring a finish between 101 and 103 could win.
The price path is identical in all three cases. The contractual question changes the result. Product names alone are therefore not enough; read the condition that triggers payment.
Contract Prices Versus Percentage Payouts
The stake model is not the only way to express the transaction. An exchange model can instead display a purchase price for a contract with a fixed winning settlement amount. Profit is then the settlement received minus the purchase price and costs. The distinction is illustrated in CME’s event contract payoff example.
For a separate hypothetical calculation, suppose a contract costs £42 and pays £100 if its condition is satisfied, or zero otherwise. Holding it through settlement produces either £58 profit or a £42 loss, before fees. The £100 is the winning settlement value, not the amount risked by the buyer.
If the same payoff costs £70, the potential profit falls to £30 and the possible loss rises to £70. The condition may look identical, but the purchase price changes the trade’s economics.
These figures also show why the underlying market price and the option price must not be confused. The threshold might refer to an index level of several thousand points, while the contract itself costs a much smaller cash amount. They measure different things.
Can a Binary Option Be Closed Before Expiry?
Some arrangements allow an early sale or buyback, but this is not a universal right. Where available, the exit payment can fall between zero and the winning settlement amount. Selling early is different from receiving the final payoff.
If the hypothetical £42 contract can be sold for £55, closing it produces £13 profit before costs. If the available sale price is £20, closing produces a £22 loss. Neither result is the contract’s final £100-or-zero settlement.
Do not assume that a displayed valuation is an executable sale price. Check whether an exit is actually available, what price applies and whether charges reduce the proceeds. A plan to close early depends on those conditions being met.
A Fixed Loss Per Trade Does Not Protect an Account
For the fully paid purchase examples above, the contractual trading loss is the purchase amount, plus any applicable costs. That makes the amount at risk calculable. It does not make losing it unlikely.
Suppose an account contains £1,000 and each contract risks £100. Each losing contract removes 10% of the starting balance. Five consecutive losses remove £500. Keeping the next stake at £100 then risks 20% of the remaining balance.
Repeated purchases create repeated exposure. A cap on each individual loss does not cap the total amount a person can lose across successive contracts.
Increasing stakes after losses does not repair an unfavourable payout structure either. After losing £100, a £200 winning stake at an 80% profit rate earns £160, leaving £60 across the two trades. Another loss instead takes the combined loss to £300. The larger stake changes the cash exposure, not the quality of the prediction.
Settlement and Withdrawal Are Separate Questions
Contract arithmetic assumes the promised payment is honoured. A platform balance showing a profit is not proof that the money can be withdrawn.
Regulators have received complaints involving refused withdrawals, misuse of identity information and software manipulation that allegedly turned winning trades into losses. These are documented in the joint CFTC and SEC binary options fraud alert. They are different risks from making an incorrect market forecast.
Keep three questions separate: did the contractual condition occur, was the correct amount credited, and can the customer recover the money? A favourable answer to the first does not prove the other two.
The guide to binary options scams and withdrawal traps covers those warning signs without confusing them with ordinary trading losses.
When assessing a binary option, reduce it to a plain statement: “I pay this amount, receive that amount if this condition occurs, and receive this other amount if it does not.” Then identify the reference value, deadline and settlement rule. If those facts cannot be established, the contract cannot be evaluated properly.
For UK retail readers, explaining the mechanics does not remove the restriction on these products. The guide to binary options regulation and the UK retail ban addresses that separate question.