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Mortgage-Backed Securities Division (MBSD)

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Fixed Income Clearing Corporation’s (FICC) Automated Funds-Only Settlement Service provides a standardized, automated method for settling non-trade, funds-only obligations each day between FICC and its customers’ settling banks.

FICC’s service eliminates manual processing and reduces costs by aggregating payments due to or from a customer and then automatically transferring the funds into or out of the customer’s settling bank.

For mortgage-backed securities, non-trade cash obligations can include the net settlement balance order market differential (SBOMD) derived from the TBA Netting process on the days of the month when mortgage-backed securities trades traditionally settle, cash adjustments related to net pool obligation settlements, principal and interest payments for failing net pool settlement obligations, (to the extent that they are not handled by the Fedwire Securities Service Automated Claims Adjustment Process (ACAP), charges assessed by the Federal Reserve Bank of New York, the Treasury Market Practices Group (TMPG) for delivery fails, as well as other items, such as, interest income rebates and routine billing matters.


Who is the service for?

The service is automatic and mandatory for FICC members that have funds-only settlement obligations. This includes Mortgage-Backed Securities Division (MBSD) clearing members.


What are the benefits of using the service?

  • Automates the  process for the settlement of funds owed to and from the Mortgage-Backed Securities Division
  • Provides a tool for market participants to ensure that obligations due to FICC are made on a timely basis; and
  • Mitigates operational risk by automating the funds-only settlement process while streamlining and standardizing the collection of funds across clearing corporations.


How the service works

FICC utilizes the Federal Reserve Bank’s National Settlement Service (NSS) to debit and/or credit net settlement obligations at the settling bank level of MBSD clearing members. The individual debits and credits of all participants using the same settling bank are totaled, and the net result established at the settling bank level will be settled using NSS. FICC has further leveraged systems and procedures already in place at The Depository Trust Company to perform this function by using it as the agent to interface with the Federal Reserve Bank for settlement. The Depository Trust Company is also a subsidiary of DTCC.

The service creates a funds-only settlement file containing all of the participants’ debits and credits for the current business day. This file is sent to DTCC’s Fed Funds Settlement (FFS) system. The DTCC Participant Browser Service (PBS) is then used to send broadcast messages containing net settlement figures to settling banks. MBSD participants will also receive report output in advance of the cash settlement due date.

Please refer to the MBSD and GSD rules regarding the timelines for funds-only settlement.  


What the Service Covers

For MBSD, cash settlement is the accumulation and projection of aggregated payable/receivables resulting from the following cash obligation items:

  • Pool Transaction Adjustment Payments
  • Clearance Adjustments
  • Principal Payments
  • Interest Payments
  • Broker Commissions
  • MBSD Clearing Billing Fee
  • Electronic Pool Notification (EPN) Billing Fee
  • Clearing Fund Interest
  • Settlement Balance Order Market Differentials
  • TMPG charges
  • Customer Protection Rule (CPR) Claims
  • TMPG Financing Amounts
  • Miscellaneous from To-Be-Announced (TBA) Clearing
  • Miscellaneous from Pool Netting


For more information

If you would like further information regarding Automated Funds-Only Settlement processing, please contact your relationship manager via the Relationship Services Group Hotline at (800) 422-0582, or by email at This email address is being protected from spambots. You need JavaScript enabled to view it..

5.00 ( 1 votes )

The Mortgage-Backed Securities Division (MBSD) section of the DTCC Learning Center provides information about all of the products and services of the Fixed income Clearning Corporations's Mortgage-Backed Securities Division.

The Mortgage-Backed Securities Division (MBSD) is the sole provider of automated post-trade comparison, netting, electronic pool notification, pool comparison, pool netting and pool settlement services to the mortgage-backed securities market thus providing greater efficiency, transparency and risk mitigation to this specialized market. MBSD's mission is to reduce the costs and risks associated with trading in the agency mortgage-backed securities market. To accomplish this mission, MBSD provides high-quality and value-added services that are driven by the needs of its members and industry participants, such as: 

  • Providing real-time automated trade and pool comparison/confirmation, TBA and pool net settlement and electronic pool notification (EPN) services; 
  • Assessing and managing risk, including credit, market and operational risk; 
  • Evaluating and improving MBS market systems and technologies; and 
  • Enhancing communication among MBS market participants.

If you are new to the Mortgage-Backed Securities industry we recommend you review the articles that appear below before using the menu at left to explore MBSD's services in greater detail. We have arranged this introductory content in the order we think will best benefit you, top-to-bottom. Be sure you are logged in, then scroll down and expand the collapsed articles below to continue. 

Quick Note About Rulebooks

The FICC/MBSD has two rulebooks, the Clearing Rules and the EPN Rules. The Clearing Rules encompass the MBSD’s trade guaranty and CCP Clearing, Novation, TBA and Pool Netting services. Clearing members must also be EPN users and thus must adhere to the EPN rules with respect to that service. Access these FICC rulebooks in the By-Laws, Rules and Procedures section of (look for Fixed Income Clearing Corporation (FICC) on that page).

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MBSD Introductory Topics (12)

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A mortgage-backed security represents an ownership interest in mortgage loans made by financial institutions to finance a borrower’s purchase of a home or other real estate. Mortgage-backed securities are created when mortgage loans are packaged, or “pooled,” by issuers or servicers, and securities are issued for sale to investors. As the underlying mortgage loans are paid off by the borrowers, the investors in the securities receive payments of interest and principal.

Mortgage-backed securities play a crucial role in the availability and cost of housing in the United States. The ability to securitize mortgage loans enables mortgage lenders and mortgage bankers to access a larger reservoir of capital, which makes financing available to home buyers at lower costs and spreads the flow of funds to areas of the country where capital may be scarce.

Asset securitization began when the first mortgage pass-through security was issued in 1970, with a guarantee by the Government National Mortgage Association (“GNMA” or “Ginnie Mae”). The most basic mortgage-backed securities, known as pass-throughs or participation certificates (“PCs”), represent a direct ownership interest in a pool of mortgage loans. Shortly after this issuance, both the Federal Home Loan Mortgage Corporation (“FHMLC” or “Freddie Mac”) and Federal National Mortgage Association (“FNMA” or “Fannie Mae”) began issuing mortgage-backed securities.

Although mortgage-backed securities are fixed-income securities that entitle investors to payments of principal and interest, they differ from corporate and Treasury securities in significant ways. With a mortgage-backed security, the ultimate borrower is the homeowner who takes on a mortgage loan. Because the homeowner’s monthly payments include both interest and principal, the mortgage-backed security investor’s principal is returned over the life of the security, or amortized, rather than repaid in a single lump sum at maturity.

Mortgage-backed securities provide payments to investors that include varying amounts of both principal and interest, due to the flexibility that the homeowner has in being able to pay more than the minimum payment required by the loan agreement. As the principal is repaid, or prepaid, interest payments become smaller because the payments are based on a lower amount of outstanding principal. In addition, while most bonds pay interest semiannually, mortgage-backed securities may pay interest and principal monthly, quarterly or semiannually, depending on the structure and terms of the issue. Most mortgage pass-through securities are based on fixed-rate mortgage loans with an original maturity of 30 years, but typically most of these loans will be paid off much earlier.

After reviewing these introductory articles, we recommend accessing the menu at left (beginning with MBSD Services) to learn more.


This section is intended to provide MBSD clients with quick access to information considered timely, important and/or recently posted to the Learning Center. Currently you may choose from the following topics:

  • FICC Loss Allocation Overview (eLearning)
  • Requests for Trade Input Extensions (guidelines and contact information)

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What Members Need To Know Topics (2)

To help you better understand the MBSD reports produced in MBSD RTTM® Report Center, several report guides were created to explain the purpose of each report, the formats in which it is available, the report headers and its data elements. For each of the menus in MBSD Report Center (i.e. MBS Clearing, MBS RTTM, and MBS PoolNet), there is an associated guide. Also available is the MBSD Operational Novation Reports Guide which explains the reports most relevant to MBSD Novation.

This is a Glossary of acronyms, concepts and terms important to understanding the processing of Mortgage-Backed Securities by the Mortgage-Backed Securities Division (MBSD) of the Fixed Income Clearing Corporation (FICC). This Glossary is provided as a convenience to members and is for informational purposes only. This Glossary should not be regarded as a definitive or exhaustive description of FICC/MBSD’s services, processes or risk-management practices; nor should it be regarded as a substitute for the Mortgage-Backed Securities Division (MBSD) Rulebook, which governs in all respects, the relationship between FICC/MBSD and its members. In all cases, members should refer to the MBSD Rulebook for a complete statement of FICC/MBSD procedures, obligations, and requirements. In the case of any discrepancy between this Glossary and the MBSD Rulebook, the MBSD Rulebook shall govern. The terms in this Glossary along with any services, processes and risk-management practices described herein may be amended at any time without prior notice. Terms coming soon and will appear below to logged in registered users of this learning center.