Common comparison error
Index binary option is a product label, not a complete condition, observation, equality, payout, settlement, or Commodity binary option specification.
GlossaryProducts & contracts
Index binary option
A fixed-outcome contract referenced to a stock-market index, subject to the broker's stated market hours and settlement source.
Practical use
How to verify Index binary option
Read Index binary option together with Forex binary option, Commodity binary option, Stock binary option. The comparison must preserve the exact rule, value, state, and evidence described below.
A neutral example
A 100-unit Index binary option references EUR/USD, pays 80 net above 1.0850 at 14:05 UTC, loses 100 below, and refunds equality; Forex binary option is specified separately. What makes this an example of Index binary option is that the referenced index needs constituent market hours, source, close method, and binary settlement rule.
Evidence path
Where to verify Index binary option
Use the source that governs the exact contract, account, entity, or platform state. A general definition cannot replace current broker terms.