An A/B note structure bifurcates a single commercial real estate mortgage into two tranches (a senior A-note and a subordinate B-note) that share the same collateral but receive different priority in the loan's cash flow and loss waterfall. Unlike a mezzanine loan, which is secured by a pledge of the borrower entity's ownership interests rather than the real property itself, both the A-note and B-note are secured by the same first mortgage lien on the same property.
The bifurcation is a contractual arrangement between note holders governed by an intercreditor agreement; it does not create separate liens but rather allocates the priority of payments and the control of enforcement rights among the two tranches.
The intercreditor agreement between A-note and B-note holders is the governing document that defines each tranche's rights throughout the loan's life and in the event of a default. In a standard A/B structure, the A-note holder receives all scheduled debt service until its balance is paid current before the B-note holder receives anything; this payment waterfall insulates the A-note from the first layer of credit risk.
The intercreditor also defines control rights: who can direct the servicer, who has the right to call for a foreclosure, and critically, who can cure a default and step into the A-note holder's position. B-note holders typically have cure rights (the ability to advance funds to bring a loan current and prevent foreclosure they did not authorize) and purchase rights that allow them to buy out the A-note at par plus accrued interest rather than allow the A-note holder to foreclose and eliminate the B-note.
In CMBS securitizations, A/B note structures frequently arise when a large loan is originated and the A-note is pooled with other loans for securitization while the B-note is retained by the originating lender or sold to a B-piece buyer. The B-piece buyer in a CMBS pool (who purchases the most subordinate securities in the securitization) may separately negotiate to acquire the B-notes on the largest loans in the pool, giving it both bond-level and loan-level exposure that concentrates risk but also provides enhanced control rights and information access.
The pricing differential between A-note and B-note reflects this structural subordination: B-notes price at yields substantially above the A-note, compensating the holder for absorbing the first dollars of credit loss on the underlying collateral.
The A/B note structure is analytically distinct from mezzanine debt even though both create a senior/junior debt capital stack. Mezzanine debt sits outside the mortgage entirely; it is secured by a pledge of the equity ownership interests in the property-owning entity, not by the real property itself, and is governed by a separate intercreditor agreement between the first mortgage lender and the mezzanine lender.
A B-note holder's rights run to the property through the first mortgage lien and the intercreditor with the A-note holder; a mezzanine lender's rights run to the equity in the borrowing entity and are subject to the mezzanine intercreditor. In a foreclosure scenario, these distinctions are critical: a B-note holder can participate in the mortgage foreclosure process through cure and purchase rights; a mezzanine lender must foreclose on the pledge of equity, a separate and faster process under the Uniform Commercial Code in most US states.
In a standard A/B structure the A-note holder receives all scheduled debt service until its balance is current before any cash flows to the B-note. Losses run in the opposite direction: the B-note absorbs the first dollars of loss on the collateral and shields the A-note until the B-note is exhausted. That subordination is the A-note's credit protection and the reason B-notes price at yields well above the A-note.
The intercreditor agreement between the note holders defines each tranche's rights through the life of the loan and in default: who can direct the servicer, who can call a foreclosure, and who can cure a default. B-note holders typically hold cure rights, the ability to advance funds to bring the loan current, and purchase rights, the ability to buy out the A-note at par plus accrued interest rather than let the A-note holder foreclose the B-note away.
Both create a senior and junior debt stack, but the collateral differs. A B-note holder's claim runs to the property through the same first mortgage lien and the A/B intercreditor. A mezzanine lender's claim runs to the equity ownership interests in the property-owning entity and is governed by a separate mezzanine intercreditor with the mortgage lender.
The distinction is decisive in enforcement. A B-note holder participates in the mortgage foreclosure through its cure and purchase rights, while a mezzanine lender enforces by foreclosing on the pledged equity, a separate and usually faster process under the Uniform Commercial Code in the US and under provincial personal property security legislation in Canada.
An A/B note structure splits a single commercial mortgage into a senior A-note and a subordinate B-note secured by the same first-mortgage lien. The A-note is paid first and priced at a lower yield; the B-note absorbs the first losses at a higher yield. An intercreditor agreement governs the relationship.
The A-note is senior: it receives scheduled debt service first and is insulated from the initial credit losses. The B-note is subordinate: it is paid only after the A-note is current and takes the first dollar of loss. Both share the same first-mortgage collateral on the same property.
A B-note is secured by the first-mortgage lien on the real property. Mezzanine debt is secured instead by a pledge of the equity interests in the borrowing entity and sits outside the mortgage. That changes enforcement: a B-note holder works through the mortgage foreclosure, while a mezzanine lender forecloses on the pledged equity.
A hope note is a subordinate B-note created when a troubled CMBS loan is bifurcated in a workout. The senior A-note is sized to what the property can service so it stays current, and the deferred balance is carved into the junior 'hope' note, recovered only if the property's value or cash flow later improves.
Cure rights let the B-note holder advance funds to bring the loan current and stop a foreclosure it did not authorize. Purchase rights let the B-note holder buy out the A-note at par plus accrued interest, taking over the senior position rather than being wiped out in an enforcement it cannot control.
No. A B-note is a subordinate piece of one whole loan, secured by that loan's first-mortgage lien. A B-piece is the most subordinate class of bonds in a CMBS securitization backed by many loans. A B-piece buyer sometimes also acquires the B-notes on the largest loans in the pool, but the two terms sit at different levels of the structure.