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Every contract is identified by a contract name that encodes everything about the instrument.

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Contract Name Format

{UNDERLYING}-{DMMMYY}-{STRIKE}-{TYPE}
For example, BTC-19JUN26-62000-C:
ComponentExampleMeaning
UNDERLYINGBTCThe underlying asset (BTC or ETH).
DMMMYY19JUN26Expiry date — day (not zero-padded), uppercase three-letter month, two-digit year.
STRIKE62000Strike price, as a whole number in quote currency.
TYPECOption type: C for call, P for put.
The day is written without a leading zero — e.g. the 3rd is 3, not 03. More examples:
Contract nameReads as
BTC-19JUN26-62000-CBTC $62,000 call expiring 19 Jun 2026
BTC-3JUL26-55000-CBTC $55,000 call expiring 3 Jul 2026
ETH-15MAY26-2500-PETH $2,500 put expiring 15 May 2026
All contracts settle at 08:00 UTC on the expiry date. See Settlement & Expiry.

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Underlying vs Contract

Some requests are scoped to a single contract, and some to an underlying plus an expiration date:
  • Contract-scoped (e.g. placing an order, subscribing to a contract’s order book): use the full contract name, e.g. BTC-19JUN26-62000-C.
  • Underlying-scoped (e.g. listing all contracts or quotes for an expiry): use the bare underlying (BTC) and an expirationDate (2026-06-19).
The Contracts Stream and Quotes Stream are underlying-scoped; the Order Book Stream and order placement are contract-scoped.

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Expiry Types

Contracts are listed on a recurring schedule and tagged with an expiry type:
Expiry typeDescription
WEEKLYShort-dated contracts that expire on a weekly cadence.
MONTHLYLonger-dated contracts that expire on a monthly cadence.
To enumerate what’s currently tradable, subscribe to the Contracts Stream or list them with the REST Get Expirations and Get Contracts endpoints.

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Contract Status

StatusMeaning
ACTIVEOpen for trading.
EXPIREDPast expiry; trading has stopped, awaiting settlement.
SETTLEDSettlement complete; realized PnL booked to your balance.