New York, Feb. 02, 2026

Provable Markets, operators of the Securities Finance platform Aurora, announce the release of their updated FIX specification and FIX Engine in line with the FIX Trading Community’s newly released best practices for securities lending orders and execution workflows.

The updates are in support of Aurora’s Marketplace Product, building upon Provable Market’s FIX Specification first released in 2022. Provable Markets will look to onboard 3rd party vendors and clients to the updated interface in the first quarter of 2026.

Provable Markets is a proud member of the FIX Trading Committee and the Securities Lending Working Group where Head of Product and Market Structure, Rachel Andreassian serves as co-chair. The FIX Trading Community’s initiative aims to unify trade execution practices and introduce open-source FIX Protocol benefits to a previously underserved area of capital markets. The current market environment—characterized by proprietary solutions and inconsistent processes—forces firms to undertake costly custom development and budget separately for each vendor, partner, or counterparty integration. Limited automation also can constrain participants ability to effectively analyze trading data.  

Commenting on the proposed guidelines, Rachel stated, “As a service provider to some of the top Securities Finance institutions, I’m excited to be part of the team that is introducing FIX to a market that can greatly benefit from a common language. By lowering the complexity and costs that typically come with integrating and automating, participants can feel more confident in adding new solutions and providers, allowing them to grow their businesses.”

Provable Markets approaches client integrations as a collaborative partnership, emphasizing guiding principles of simplicity and interoperability. Speaking on the development, Alec Rhodes, VP of client solutions, said “This fantastic enhancement helps the team at Provable continue to deliver on our pledge to offer universal and agnostic connectivity solutions to maximize our client’s ability to interact with the broader Securities Finance ecosystem”.

Please reach out to sales@provablemarkets.com if you are interested in connecting, viewing the reversioned specification, or learning more.