Securities Financing

FIX provides industry standards and implementation guidance for repo and securities lending workflows, helping firms automate processes, reduce integration costs and improve operational efficiency.

Repo and securities lending remain rich areas for automation, with many workflows still dependent on manual intervention, bilateral interpretation of economic terms, and fragmented technology stacks.

Opportunities exist across the full lifecycle—from electronic negotiation and execution through confirmation, collateral management, lifecycle events (such as rerates, recalls, substitutions, and terminations), and downstream processing—particularly as markets move toward shorter settlement cycles and higher intraday activity.

The FIX Protocol is well positioned to support this evolution by providing a widely adopted, vendor‑neutral messaging standard that enables firms to represent financing transactions and events using common semantics and reusable message patterns already familiar from other asset classes.

By enabling interoperable, event‑driven communication rather than prescribing business models, FIX allows market participants to automate at their own pace while reducing operational risk, improving straight‑through processing, and supporting scalable growth in repo and securities lending activity.

The FIX Protocol provides a standardised electronic messaging framework that can be applied to repurchase agreement (repo) transactions, addressing long‑standing fragmentation in how repo trades are negotiated, confirmed, and lifecycle‑managed across bilateral relationships.

Repo markets have traditionally relied on proprietary messages, manual workflows, or loosely aligned standards, making straight‑through processing difficult and increasing operational risk. Differences in how firms represent economic terms (such as collateral, rates, settlement dates, and lifecycle events) hinder automation, interoperability, and scalability—particularly as repo activity expands across trading venues, clearing models, and regulatory regimes.

Within its broader role as a cross‑asset messaging standard, FIX enables firms to represent repo transactions using a common data model and message‑based workflows that can be agreed bilaterally or at market level. This supports electronic negotiation, trade capture, confirmation, and downstream processing using consistent semantics, while remaining flexible enough to accommodate different repo structures and market practices. The FIX approach focuses on interoperability rather than prescribing business models, allowing buy‑side, sell‑side, venues, and service providers to integrate repo processing into existing FIX‑based infrastructures. Details can be found in the following documents:

- Recommended Practices for Bilateral & Tri-Party Repos (Trading)

- Recommended Practices for Bilateral & Tri-Party Repos (Post-Trade)

Securities lending remains one of the least electronified major trading activities in capital markets, despite its systemic importance to liquidity, short selling, market making, and settlement efficiency.

Key drivers for change include:

  • Operational risk and inefficiency: Manual workflows increase the risk of mis booking, mismatched economics, and delayed confirmations.
  • Scalability constraints: Phone- and spreadsheet based processes do not scale in high volume or time critical environments.
  • Regulatory pressure: Short selling, settlement discipline, and transparency requirements all benefit from reliable, time stamped electronic records.
  • Market evolution: T+1 settlement, real time risk management, and increasing automation elsewhere in the trade lifecycle expose securities lending as a weak link.

The FIX Trading Community has been working on securities lending electronification, responding to long standing industry reliance on manual, bilateral, and vendor specific workflows.

Through its Securities Lending Working Group, FIX has brought together lenders, borrowers, agents, venues, and technology providers to define open, interoperable standards that support electronic securities lending trading across buy side and sell side participants.

The goal is not to mandate a single market structure, but to ensure functional equivalence and interoperability across bilateral trading, platforms, and venues.

Key Deliverables and Progress:

  1. Phase One: Electronic Trade Execution (Completed December 2025)
    In November 2025, FIX published Phase 1 Recommended Practices supported by extension pack EP301 for securities lending trade execution. This work defines how existing FIX messages can be used to electronically agree and confirm securities lending transactions, covering both bilateral and venue based models.
  2. Phase Two: Availability and Negotiation Workflows (Completed July 2026)
    In early 2026, the working group moved into Phase Two, extending FIX support beyond executio`n into pre trade communication, including the electronic distribution of availability and optional negotiation workflows. This phase focused on publishing securities availability via Quote messages, facilitating borrower responses through NewOrderSingle or QuoteResponse, and enabling optional RFQ-based and negotiated workflows to accommodate various business models. The results can be found in Phase 2 Recommended Practices supported by extension pack EP307.