Government Securities Division

US Government Securities is the largest sector of the fixed income market. The GSD Learning Center is designed as an educational resource to better equip Fixed Income Clearing Corporation's (FICC's) Government Securities Division (GSD) Members and stakeholders with tools needed to use GSD's products and services.

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 The GSD acts as a central counterparty (CCP), providing trade comparison, novation, and guarantee services along with its netting, settlement, and risk management services to its Members in the U.S. Government Securities market.

Currently, GSD supports the following primary services:

  • Delivery vs. Payment (DVP),
  • General Collateral Finance Repo (GCF Repo®)/Centrally Cleared Institutional Tri-Party (CCIT™), and
  • Sponsored Membership.

GSD processes several types of transactions including:

  • Buy/sell transactions of U.S. Government securities,
  • Dealer-to-dealer and broker-to-dealer DVP Repos (including overnight, same-day settling, forward-starting and term Repo trades),
  • Treasury Auction Takedown trades,
  • GCF Repo transactions,
  • CCIT Transactions, and
  • Sponsored GC transactions.

GSD offers the following types of membership:

  • Netting Membership,
  • Sponsored Membership,
  • CCIT Membership,
  • Comparison-Only Membership, and
  • Funds-Only Settling Bank Membership.

GSD’s comparison service for Comparison-Only Members provides trade comparison services but does not provide trade novation and guarantee of settlement, nor does it provide its netting, settlement or risk management services to Comparison-Only Members.

Participating Members include:

  • Repo brokers,
  • Banks,
  • Dealers,
  • Government securities issuers,
  • Foreign persons,
  • Registered clearing agencies, and
  • Qualified institutional buyers (QIBs) who meet GSD’s membership requirements.

Looking for a particular MRO format? A sample report? Information about a message's structure? Messages specific to Sponsored Clearing Fund?
This page is your one-stop shop for formatting information.

 There are two learning paths available within the GSD area:

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FICC Risk Reporting Portal User Guide

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FICC GSD: Client Lifecycle Management Onboarding Hub User Guide

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Capped Contingency Liquidity Facility® (CCLF®): Annual Test Webinar

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GSD Netting MRO Format (Intraday) – File 1018 – 240 Byte

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GSD Netting MRO Format (EOD) – File 1019 – 240 Byte

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MBS Market Overview

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February 05, 2026

Optional Locked-In IDB Transactions

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FOS Interest Adjustment Payment Settlement Change – Frequently Asked Questions

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Agent Clearing Service Mark-to-Market (Haircut) MRO File Format: Intraday and EOD

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GSD VaR Calculator User Guide

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GSD VaR Calculator Estimator

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Sponsored Account VaR CUSIP Detail MRO Specification (SponsoredCusipDtl)

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Portfolio VaR CUSIP Detail Report for GSD MRO

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MBSD Cash-Only Settlement Item Guide

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Sponsored Service Mark-to-Market (Haircut) MRO File Format: Intraday and EOD

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GSD Clearing Fund Summary: MRO Format

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GSD Clearing Fund Summary for Segregated Indirect Participants MRO

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Overview of the GSD Clearing Fund Methodology

This document explains the elements of the Clearing Fund methodology, such as calculations, VaR, portfolio differential, margin liquidity, and more.
November 24, 2025

EPN Implementation Guide

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FICC Loss Allocation Overview - Part 1

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FICC Loss Allocation Overview - Part 2

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Overview of the MBSD Clearing Fund Methodology

This document provides a high-level introduction to the components of the Required Fund Deposit, the calculation and collection of which serves as a key tool that FICC uses to manage market risk.
October 31, 2025

MBS EPN Message Layouts

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FICC Members Network Connectivity Options (URLs)

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