The Rating Monopoly
RTL Securitization · July 2026 · 4 min read
In March 2026, KBRA rated its first residential transition loan securitization, ending Morningstar DBRS's over two-year monopoly on the asset class. The two agencies use fundamentally different frameworks: Morningstar's is rules-based with hard eligibility thresholds baked into deal documents; KBRA's is principles-based, driven by loan-level modeling and third-party review. For RTL originators, the difference creates structural optionality, with an early window to influence criteria that are still being written.
The Rating Monopoly: How a single agency held the keys to rated RTL securitization
In October 2023, Morningstar DBRS finalized the first ever rating methodology for residential transition loans (RTLs). RTLs are short-term, interest-only, and often secured by properties with uncompleted renovations. Most rating agencies prefer their collateral to exist. But DBRS decided that was a solvable problem. After six years of channeling data, that decision made them the only gatekeeper between RTL originators and truly institutional capital.
The money moved fast once the door opened. Toorak's first rated deal in February 2024 upsized from $192 million to $240 million mid-marketing. Investors saw a rating and showed up. Kiavi's February 2026 deal came in five times oversubscribed with seven first-time institutional buyers. Fidelis got every tranche of its 2025 deal oversubscribed. Many of the purchasers literally cannot participate in an unrated deal by mandate. Both supply and demand existed. The real constraint was a single set of rules, made by Morningstar, and issued by Morningstar.
A Stranger Comes to Town: How KBRA shatters the status quo
In March 2026, KBRA entered the scene. In just a quarter, it closed its first rated RTL deal with Fidelis Mortgage Trust 2026-RTL2, a $191.5 million revolving transaction. Morningstar also rated the deal, issuing identical ratings.
They do not run the same framework with slight variations. Morningstar uses rigid and detailed eligibility criteria baked into the deal documents — a minimum weighted-average FICO of 725, a maximum loan-to-cost of 85%, and a maximum after-repair loan-to-value of 70%. KBRA takes a principles-based approach: loan-level RTL model analysis, third-party due diligence review, cash flow modeling, and legal structure assessment, with a GUC cap of 25% versus DBRS's typical 30%.
| Metric | Morningstar DBRS | KBRA |
|---|---|---|
| Core Methodology | Rules-based: rigid eligibility criteria baked into deal documents | Principles-based: loan-level model analysis, due diligence review, cash flow modeling |
| FICO Score | 725 weighted-average floor | Scores mapped onto a default curve; lower scores require increased credit enhancement |
| Borrower Track Record | Buckets borrowers when calculating default probability | Uses a continuum to calculate default probability |
| Asset Class Concentration | Low, strict ceilings outside of 1–4 units | Assumes greater loss severity in default outside of 1–4 units |
| Geographic Concentration | Rigid penalties if a single state exceeds concentration limits | Simulates localized market downturns to dynamically adjust default assumptions |
| GUC Concentration | 30% concentration limit | 25% concentration limit |
Two agencies looked at the same Fidelis deal and applied two different lenses to it. That creates something that did not exist before: optionality. And with optionality comes the ability to choose, to negotiate, and eventually to influence.
DBRS's criteria have not been fixed either. The minimum FICO floor moved from 735 to 725. Maximum LTC went from 80% to 85%. The rulebook was always a living document. It just had one author. Now it has two, and both are still writing.
What's Next: Using data to shape the next phase of RTL securitizations
Morningstar's methodology did not emerge fully formed. It was built from six years of Toorak's own loan-level performance history, shared with the agency before any public framework existed. While Toorak's earlier unrated deal priced at SOFR + 3.25%, their first rated deal priced at SOFR + 2.10%. Adding their rated DSCR portfolio, Toorak profited more than $50,000,000, purchased entirely with data and patience.
A similar opportunity exists now, in two places at once. Morningstar is still refining its criteria as more performance data accumulates. KBRA is building its RTL track record from scratch, actively calibrating its model against live transactions. Both agencies need data to do it. That is not a passive process. It is a negotiation, and originators with clean, verifiable data get a seat at the table. They get to argue that their underwriting discipline should be reflected in the criteria, not a standard written around someone else's book. And they get paid through spread compression when they finally bring their own deal to market.
The originators who wait will inherit a rulebook written by someone who showed up earlier. That is how it worked the first time, and how it will work again.
Lightwell Financial works with private lenders to introduce institutional LPs, credit facilities, and note buyers, and build the data infrastructure needed to access institutional capital.