Santander and BlackRock Launch First Electronic Mexican Repo Market via Tradeweb

Pioneering Electronic Repo Trading in Mexico

Santander Corporate & Investment Banking (SCIB) and BlackRock have officially launched the first fully electronic trading solution for Mexican repurchase agreements (repos), utilizing the Tradeweb Markets platform. This significant development, announced on November 13, 2025, marks a pivotal step in modernizing Mexico's financial markets.

The new solution is designed to replace traditional manual processes with a seamless digital experience, aiming to improve both the efficiency and transparency of Mexican repo markets. This initiative positions Mexico as the first country in Latin America to adopt such an advanced electronic repo trading system, bringing its operations in line with those in more developed markets like Europe and the United States.

Enhanced Efficiency and Market Access

The electronic platform offers substantial benefits for institutional clients, primarily Afores (Mexican pension fund administrators) and investment funds. These entities will now experience a fully digital management process, encompassing everything from request-for-quotes to execution, post-trade fund allocation, and collateral assignment. This automation is expected to significantly reduce operational risks.

Luis Betancourt Barrios, Executive Director of Markets at Santander Mexico, emphasized that this launch 'positions Santander as leader in the structure of market and digitalization in the region with allies like BlackRock and Tradeweb, represents a milestone in the innovation in Mexico, and opens a new era in these operations projecting the country to an international level.' He added that for clients, it is 'a substantial step that, in addition to facilitating operations, allows them to reduce risks by automating processes.'

Key Players and Operational Details

The collaboration saw the first operation on the Tradeweb platform executed with BlackRock acting as the client and Santander CIB as the initial liquidity provider. Users of BlackRock's Aladdin OEMS can directly connect to the Tradeweb platform, with Mexican government securities available as collateral. The platform supports trading across various repo segments, including specials, GC, and triparty, for a range of terms.

Sergio Mendez, BlackRock's Country Head for Mexico, stated that 'trading Mexican repos through our Aladdin platform and Tradeweb represents a radical change. It expands our clients' trading capabilities and improves operational efficiency.' Kerim Acanal, Managing Director, Global Head of Emerging Markets at Tradeweb, highlighted that 'the Mexican repo market is ready for digitalization.' Tradeweb's global repo marketplace currently supports over 20 currencies and provides institutional clients with access to liquidity from 59 dealers, reporting an average daily trading volume of $811.7 billion in September 2025.

Future Outlook

Tradeweb plans to expand its network by onboarding additional dealers and clients with Mexican peso repo books in the near future. This pioneering solution is anticipated to benefit other entities, further strengthening the electronic repo market within Mexico.