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Binary Options: Fixed Payouts, Pricing, and Platform Risk

For educational purposes only; not investment advice.

Direct answer

Section titled “Direct answer”

A binary option pays a fixed amount if a stated condition is satisfied and otherwise pays zero. A cash-or-nothing call with payout Q, strike K, and expiration price S_T has payoff:

Q × 1(S_T > K)

The indicator is either one or zero. A one-cent difference around the settlement threshold can therefore change the entire payout. Contract wording may instead use ≥, a put condition, a price range, or another verifiable event, so the official rulebook controls.

Binary options are not the same as ordinary listed calls and puts. Some lawful exchange-traded event contracts exist, but regulators have repeatedly warned that many internet binary-option platforms operate illegally or fraudulently.

Price, probability, and settlement

Section titled “Price, probability, and settlement”

In a simplified frictionless model, current value is the discounted risk-neutral expectation of the payout:

Binary value = discount factor × Q × risk-neutral probability(condition)

That risk-neutral probability is a pricing quantity, not a direct forecast of the real-world chance of success. Market price can also include bid-ask spread, fees, inventory, liquidity, credit, and contract-specific settlement risk. Dividing a quote by the maximum payout without these adjustments can produce a misleading “probability.”

Near the threshold, the payoff has a discontinuity. Small changes in spot, volatility, time, or the settlement print can move value sharply. Unlike an ordinary call, a higher terminal price beyond the threshold does not increase the fixed payout.

Settlement definitions matter: data source, observation time, averaging method, rounding, disruption rules, and treatment of a price exactly at the threshold. A platform that controls its own displayed price, customer funds, and settlement decision creates a fundamentally different risk from a regulated market with independent clearing and published rules.

$100 payout example

Section titled “$100 payout example”

Suppose a binary call costs $45 and pays $100 if an official settlement price is above $50 at expiration; otherwise it pays $0.

  • At $50.01, gross payout is $100 and profit before fees is $55.
  • At $49.99, payout is $0 and the entire $45 stake is lost.
  • The expiration breakeven success frequency over repeated identical trades is 45 / 100 = 45% before fees only if the $45 price and $100 payout are both actually obtainable and outcomes are independent and identically distributed.

A quoted price of $45 does not prove a 45% real-world probability. If total entry and settlement fees are $3, the success frequency required merely to break even becomes 48%. A withdrawal refusal can make the economic payoff zero even after the displayed contract wins.

Due-diligence checklist

Section titled “Due-diligence checklist”
  • Verify the venue, intermediary, registration status, jurisdiction, and disciplinary history with the relevant regulator.
  • Read the exact condition, comparison operator, data source, observation time, time zone, and disruption rules.
  • Confirm maximum payout, stake, every fee, withdrawal terms, and custody of customer assets.
  • Distinguish a risk-neutral pricing probability from a statistical forecast.
  • Stress settlement immediately above and below the threshold and any disputed or missing data.
  • Avoid sending more money to unlock withdrawals or recover prior losses; this is a common fraud pattern.
  • Preserve account records and communications, and report suspected fraud promptly.

Common misconceptions

Section titled “Common misconceptions”
  • “Binary means the risk is simple.” The payout is simple; settlement, pricing, platform, and legal risks may not be.
  • “A $45 price means a 45% chance.” That inference requires assumptions and adjustments that may not hold.
  • “A winning screen balance is cash.” It is not realized if the platform blocks withdrawal.
  • “Limited loss makes expected value favorable.” A capped stake can still have persistently negative expected value.
  • “Being right about direction is enough.” The exact threshold, observation time, and settlement source decide the result.
  • “All binary options are illegal.” Legal status depends on product, venue, intermediary, and jurisdiction; verify rather than infer.
Section titled “Related topics”

Authoritative sources

Section titled “Authoritative sources”