Additional Product Lighter (LITF0:USTF0), Updated Product Descriptions for Bitfinex Derivatives

Bitfinex Derivatives* is pleased to announce the following update to the Derivatives Product Descriptions. The Product Descriptions now include Lighter perpetual contract (API: LITF0:USTF0) as of 08/10/2026 at 8:00 PM UTC.

The new LITF0:USTF0 perpetual contract can be traded with a maximum leverage of 100x. Please note there are no trading fees for any Bitfinex contracts, following the implementation of Bitfinex's zero-fee trading policy.

You can find full details of our perpetual contracts in the Derivative Product Descriptions here.

The above summary description is for convenience purposes only. If there are any differences between the description above and the Derivative Product Description, the Derivative Product Description will govern. Please read them carefully to ensure you understand the products available on the derivatives platform.

*The derivatives platform is provided by iFinex Financial Technologies Limited. References to Bitfinex Derivatives in this post are references to iFinex Financial Technologies Limited.

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We’ve updated FIRST_TRADE field across several Bitfinex V2 API endpoints and channels. These changes took effect on 23 September 2026.

What is FIRST_TRADE ? 

FIRST_TRADE represents the timestamp of the very first trade executed on a given trading pair and can be either int or null:

• int (Timestamp): Returned when a trading pair has an existing trade history.
• null: Returned when a pair is newly listed and has no executed trades yet.

What’s changing

The FIRST_TRADE field is being updated across the following V2 API endpoints and WebSocket channels:

• pub:info:pair
• pub:info:pair:bitfinex
• pub:info:pair:futures
• pub:info:pair:futures:bitfinex
  The first element will now return FIRST_TRADE as int | null
  Check documentation
  
  
• /v2/ticker/
  FIRST_TRADE will now return int | null
  Check documentation
  
  
• /v2/tickers
  FIRST_TRADE will now return int | null
  Check documentation
  
  
• WebSocket ticker channel: { event: 'subscribe', channel: 'ticker', symbol: }
  FIRST_TRADE will now return int | null
  Check documentation
  

What you need to do

If your integration uses any of the endpoints or channels above, please review your implementation as soon as possible and make sure it can handle FIRST_TRADE returning either an integer (int) or null.