CMBS risk retention: who keeps 5% of the risk, and how

CMBS risk retention is the federal rule that a commercial mortgage securitization’s sponsor keep at least 5% of the credit risk it sells: a 5% slice of every class, a first-loss piece worth 5% of the deal’s fair value, a mix of the two, or a qualified B-piece buyer holding the first-loss piece. It has applied to CMBS since December 24, 2016.

The rule comes from Section 15G of the Securities Exchange Act, added by the Dodd-Frank Act. Six agencies adopted it jointly in 2014 (79 FR 77602, December 24, 2014); the SEC’s version is Regulation RR, 17 CFR part 246, and the banking agencies’ versions are parallel (the BANK5 2025-5YR14 prospectus cites the OCC’s, 12 CFR part 43). Compliance was required for residential mortgage deals from December 24, 2015 and for all other asset classes, CMBS included, from December 24, 2016.

The ways to hold 5%

Option	Rule	What it requires
Eligible vertical interest	§246.4(a)(1)	At least 5% of every class (or a single vertical security)
Eligible horizontal residual interest	§246.4(a)(2)	First-loss classes worth at least 5% of the fair value of all ABS interests, measured under GAAP
Combination (L-shaped)	§246.4(a)(3)	Vertical percentage plus horizontal fair value percentage of at least 5
Horizontal cash reserve account	§246.4(b)	Cash equal to the horizontal amount, in place of holding the bonds
Third-party purchaser (CMBS only)	§246.7(b)	Up to two B-piece buyers hold the horizontal interest for the sponsor

The horizontal interest is defined by its place in the payments: on any date when the trust cannot pay all interest and principal due, the shortfall must reduce what the horizontal interest gets before it reduces any other class (§246.2, “eligible horizontal residual interest”). The sponsor, or a majority-owned affiliate, can hold any of these (§246.3(a)).

The CMBS-only option: a B-piece buyer holds it

Commercial mortgage deals have a long history of a specialist investor buying the bottom classes, so the rule lets that investor carry the sponsor’s obligation if the transaction meets every condition in §246.7(b):

1. No more than two purchasers, and if two, their interests are pari passu.
2. Only commercial real estate loans (and servicing assets) in the pool.
3. Cash at closing, no financing from the sponsor, depositor, servicer or other transaction parties (other than a special servicer affiliated with the purchaser).
4. An independent review of each loan’s underwriting, collateral and expected cash flows before the bonds are sold.
5. No affiliation with transaction parties, except the special servicer or originators of less than 10% of the pool.
6. An operating advisor that is unaffiliated, holds no financial interest beyond its fees, acts for investors as a collective whole, reviews the special servicer, and reports on whether it is meeting the servicing standard. Once the horizontal interest has been reduced (by payments, losses and appraisal reductions) to 25% or less of its original balance, the special servicer must consult the operating advisor before any material modification, foreclosure or property acquisition. The advisor can recommend replacing the special servicer, which takes a majority of the bondholders voting, with a quorum of no more than 20% of the outstanding balance including at least three unaffiliated holders.
7. Disclosure of the purchaser’s name, experience, the fair value it holds and the price it paid, the operating advisor’s terms, and any loans that did not meet the loan sellers’ representations and why they were included anyway.
8. Hedging, transfer and pledging limits as if the purchaser were the sponsor, with one route out: after five years, the initial purchaser may sell to a successor purchaser that meets the same tests.

The retaining sponsor stays responsible for the purchaser’s compliance and must tell bondholders if the purchaser falls out of compliance (§246.7(c)).

A real deal: BANK5 2025-5YR14

Item	BANK5 2025-5YR14
Retaining sponsor	Wells Fargo Bank, National Association
Method	Third-party purchaser holding an eligible horizontal residual interest
Third-party purchaser	TL DF8 RR, LLC, an affiliate of the special servicer and the initial controlling class representative
Classes held	F-RR, G-RR, J-RR, K-RR ($76,061,752 face)
Fair value held	About 5.03% of the fair value of the certificates other than Class R
Qualifying CRE loans	0.0% of the pool, so the requirement stayed at 5.0%
Transfer restriction	No transfer, except to a majority-owned affiliate, until April 24, 2030
Operating advisor	BellOak, LLC

Source: BANK5 2025-5YR14 prospectus, “Credit Risk Retention”. The 5.03% figure is fair value; the same classes are 8.6% of the deal’s face amount, because first-loss bonds sell well below par. More on the buyer: the B-piece.

How long the risk must be held

The general rule in §246.12(f)(1) ends the hedging and sale restrictions at the latest of: the pool balance falling to 33% of its original amount, the bonds’ balance falling to 33% of theirs, or two years after closing. For a CMBS third-party purchaser the five-year bar on transfers sits on top, and the restrictions end early if every loan in the pool has been defeased (§246.7(b)(8)). Residential mortgage deals have their own longer schedule in §246.12(f)(2), one of several differences covered on CMBS vs RMBS.

Qualifying CRE loans: the exemption almost nobody uses

A loan that meets the underwriting standards in §246.17 carries 0% retention, and the sponsor’s 5% requirement falls by the qualifying share of the pool, with that share capped at 50% (so retention never drops below 2.5% when the rest of the pool is non-qualifying; §246.15). The standards include:

• a first lien, an appraisal, an environmental risk assessment, and an analysis of the borrower’s ability to service its debt over the next two years;
• DSCR of at least 1.5 for a qualifying leased property, 1.25 for multifamily and 1.7 for other property, on both the prior two years’ actual performance and two years of projections;
• LTV of 65% or less and combined LTV of 70% or less (60% and 65% if the appraisal’s cap rate is at or below the 10-year swap rate plus 300 basis points);
• level monthly payments that fully amortize the loan over no more than 25 years (30 for multifamily), on a term of at least ten years, with no interest-only period.

Those last terms rule out most conduit loans. Of the loans securitized in the last 12 months, most were interest-only for their entire term and most had five-year terms (see CMBS underwriting for the current shares from SEC filings). BANK5 2025-5YR14, a five-year deal 86.9% interest-only by balance, reported 0.0% qualifying CRE loans.

What risk retention means for a borrower

• Your loan is underwritten twice. The lender underwrites it to sell; the risk holder underwrites it to keep. That second review is why loans get resized or pulled before a deal prices. See the securitization process.
• The first-loss holder is in it for years. A five-year hold matches a five-year loan, so the investor who can veto a workout on your loan will usually still own the risk when you ask.
• There is a referee. The operating advisor exists because of this rule. If a special servicer is not following the servicing standard, the advisor’s reports go to all bondholders. See master vs special servicer and special servicing.

If you are financing now, none of this changes your paperwork, but it does explain your lender’s caution. Get terms from several lenders through get financing, and compare CMBS loan terms with bank and life company options.

Sources: Securities Exchange Act §15G (15 U.S.C. 78o-11); 17 CFR 246.1-246.17, eCFR current text; Credit Risk Retention final rule, 79 FR 77602 (December 24, 2014), effective and compliance dates; BANK5 2025-5YR14 prospectus, “Credit Risk Retention” and “Mortgage Pool Characteristics”. This page describes a federal rule and is not legal advice.