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AB 2021-02: AGENCY COMMERCIAL MORTGAGE-BACKED SECURITIES RISK MANAGEMENT
PurposeThis Advisory Bulletin (AB) provides Federal Housing Finance Agency (FHFA) guidance regarding Federal Home Loan Banks' (individually Bank, or collectively Banks) investments in Agency Commercial Mortgage-Backed Securities (CMBS) issued and guaranteed by either the U.S. Government (Ginnie Mae) or by one of the Government-Sponsored Enterprises (Fannie Mae and Freddie Mac, or collectively the Enterprises). The guidance recommends risk management practices, including the establishment of certain limits, to address the risks associated with unexpected prepayments of Agency CMBS investments. FHFA encourages early adherence to this AB. However, by December 31, 2021, all Banks should have appropriate Agency CMBS concentration risk limits in place.
BackgroundThe Banks have exposures to Agency CMBS within their investment portfolios. Agency CMBS include prepayment protection clauses that are not offered on Agency Residential Mortgage-Backed Securities (RMBS). Prepayment (i.e., call) protection features included on the underlying loans within Agency CMBS are designed to discourage borrower prepayments and protect investors through the payment of fees if voluntary prepayments occur. The additional prepayment protection offered by Agency CMBS makes these investments attractive alternatives to Agency RMBS.
The loans included in Agency CMBS may include varying call protection features such as lockout periods, yield maintenance, point penalties, and defeasance. In addition, these loans may have complex structures, including amortization schedules beyond thirty years and floating interest rates. The variability of call protection features combined with the complexity of loan structures make estimating Agency CMBS prepayments difficult, leaving investors at risk when prepayments occur unexpectedly.
Voluntary prepayments may occur when borrowers determine that the benefits associated with prepayment exceed the cost of any resulting penalties. For example:
Additionally, Agency CMBS may include floating-rate loans where borrowers are assessed only partial or no penalties for early prepayments, provided the loans are refinanced with specified loan products. When this occurs, Agency CMBS investors receive minimal or no compensation for voluntary prepayments.
Furthermore, involuntary prepayments, or defaults, may occur. Involuntary prepayments are more likely to occur in periods of economic downturn generally driven by weakened real estate market fundamentals, such as declining property values, rising vacancies, breaches of lender representations and warranties, and possibly rising interest rates for adjustable rate borrowers. Although Ginnie Mae and the Enterprises guarantee timely principal payments to bondholders upon default, investors do not receive any prepayment fees under these involuntary prepayment scenarios.
In summary, unexpected prepayments may force Banks to reinvest in lower yielding assets, write off any premiums when valued above par, and incur the costs of associated debt overhang and transactions to unwind hedges. Depending on the nature of Agency CMBS and prepayment, a Bank may receive limited or no penalty fees to cover these costs.
As described above, prepayments on Agency CMBS investments expose Banks to potential losses. Agency CMBS investments with a relatively high premium to par value increase Banks' exposure to prepayment risk and the resulting losses. To minimize the risk of losses from Agency CMBS investments, Banks should consider incorporating the following risk management practices into their existing market and model risk management programs.
Pre-purchase AnalyticsBanks should analyze each Agency CMBS prior to purchase. The analysis should include a careful assessment of the security's structure, including prepayment protection features, price variability, and prepayment history for a comparable benchmark Agency CMBS. Most importantly, the pre-purchase analysis should include stress scenarios to compare the amount of call protection premiums or fees the Bank will receive versus any loss of income resulting from the reinvestment of the prepayment proceeds under various stressed interest rate scenarios. In addition, a Bank's pre-purchase analysis should ensure that the security the Bank is considering for purchase conforms to the Bank's investment strategy and is consistent with the Bank's board-approved strategic plans and risk appetite.
Minimum Risk-Adjusted Spread Requirement
Each Bank should establish a minimum acceptable risk-adjusted spread requirement for Agency CMBS investments. Banks should consider factors such as their risk appetite when establishing the required minimum. Regardless of the approach, Banks should make certain each Agency CMBS purchase meets the established minimum risk-adjusted spread requirement.
To limit exposure to both voluntary and involuntary prepayments, Banks should diversify their Agency CMBS investments to prevent concentrations of loans with shared characteristics. To accomplish this, Banks should establish appropriate limits based on the characteristics of the underlying loans within Agency CMBS investments. For example, Banks should consider individual loan size limits within a securitization, especially for single loan pool CMBS. In addition, Banks should consider implementing limits for loans, as a percentage of all Agency CMBS loans, for the following:
ReportingBanks should monitor and report on Agency CMBS investments as a separate investment segment. A Bank's Asset-Liability Committee (ALCO) and a responsible board committee should receive quarterly reporting on Agency CMBS investments. At a minimum, quarterly reporting should include the following:
Prepayment ProjectionsCurrently, Banks use static prepayment assumptions and/or vendor supplied multifamily prepayment models for Agency CMBS valuations. To support and improve the accuracy of Agency prepayment projections, Banks may use Bank-derived curves or vendor models which meet the principles outlined in FHFA AB 2013-07, and should further consider the following:
While the above actions will improve upon current prepayment estimations, a Bank may need a vendor-provided prepayment model in concert with a stochastic interest rate model to more accurately estimate the prepayment behavior of Agency CMBS. Each Bank should carefully evaluate the available modeling alternatives and determine if any single model, or a combination of multiple models, is suitable to meet its Agency CMBS portfolio's analytical needs. In acquiring the model(s), Banks should make certain that the model's estimation process fully and accurately incorporates the prepayment penalties charged to borrowers and passed on to the investors. Any mitigating risk factors such as tranche priority in sequential pay structures should be documented. Related Guidance and RegulationsThe following provides a summary of some of FHFA's regulation and guidance for governance and investments:
 The Federal Home Loan Bank Investments regulation permits investments in Agency CMBS.
See 12 CFR part 1267.
 For example, Fannie Mae's Structured Adjustable-Rate Mortgages (SARM) allow borrowers to convert their floating-rate loans to one of Fannie Mae's fixed-rate loan programs by paying a one percent premium which is not passed on to investors.
 If a Bank cannot use an option-adjusted spread approach to determine the risk-adjusted spread for each Agency CMBS, then the Bank may choose to apply a purchase price premium, duration, or net interest income spread approach.
 12 CFR § 1239.4.
 12 CFR § 1239.4(a).
 12 CFR § 1239.11(a).
 12 CFR part 1236, Appendix.
 12 CFR § 1236.3(d). FHFA has authority to address unsafe or unsound practices through issuance of an order to cease-and-desist, assessment of civil money penalties, or removal from office.
See 12 U.S.C. §§ 4631(a)(1), 4636(b)(2)(A), 4636a(a)(1), 4636a(a)(2)(A).
 12 CFR § 1236.4.
FHFA has statutory responsibility to ensure the safe and sound operations of the regulated entities and the Office of Finance. Advisory bulletins describe FHFA supervisory expectations for safe and sound operations in particular areas and are used in FHFA examinations of the regulated entities and the Office of Finance. Questions about this advisory bulletin should be directed to
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