Key Takeaways
- • Moody's reports that aggregate US life insurer allocations to fund finance rose from 1.3% to 1.9% of cash and invested assets between 2024 and 2025, driven largely by rated note feeder (RNF) structures.
- • An A2-rated senior RNF note carries a 0.82% risk-based capital charge for a life insurer, versus 30% for a direct fund investment reported on Schedule BA, a roughly 36-to-one difference according to Moody's data.
- • Moody's warns that RNF ratings are typically assigned on a private letter basis, limiting public visibility into credit quality and portfolio exposure, and that protections depend on valuations set by general partners with limited independent verification.
- • RNFs have not been tested through a full private credit cycle, with Proskauer's Private Credit Default Index rising to 2.73% in Q1 2026 before easing to 2.51% in Q2 2026.
- • The NAIC's SAPWG exposed revisions to bond accounting rules for "multi-collateral structured credit investments" at its August 12, 2026 summer national meeting, with a broader follow-on project on feeder funds anticipated.
Summary
US life insurers have rapidly expanded their use of rated note feeder (RNF) structures, special purpose vehicles that issue rated senior and junior notes alongside an unrated equity tranche and invest the proceeds as a limited partner in a private credit fund. According to a sector report from Moody's Ratings, aggregate insurer allocations to fund finance rose from 1.3% to 1.9% of cash and invested assets between 2024 and 2025, based on Moody's survey of rated US life insurers. Moody's describes RNFs as among the fastest-growing fund finance vehicles for the sector.
The appeal lies in capital treatment. Because the rated notes qualify as bonds under statutory accounting, an A2-rated senior note carries a risk-based capital charge of 0.82% under NAIC rules, compared with 30% for a direct fund investment reported on Schedule BA. Private credit, defined broadly to include private placements and mortgage loans, accounted for an estimated 35% of US life insurance investments at year-end 2025 according to Moody's, and the NAIC estimates US insurers held approximately $1.2 trillion in private credit, roughly 13% of cash and invested assets, at the end of 2025.
Moody's identifies structural risks. RNF ratings are typically issued on a private letter basis, so ratings rationale and underlying portfolio details are not publicly disclosed, limiting independent assessment by regulators, counterparties and analysts. Moody's also notes that credit protections such as subordination, overcollateralization and cash sweep triggers are only as reliable as the asset valuations that activate them, and those valuations are typically set by the general partner or fund administrator with limited independent verification. Moody's cautions that RNFs have not been tested through a full credit cycle, having grown during broadly benign conditions. Proskauer's Private Credit Default Index recorded 2.73% in Q1 2026, up from 1.84% in Q3 2025, before easing to 2.51% in Q2 2026.
The NAIC's Statutory Accounting Principles Working Group has reviewed RNF structures over several years. The central concern is that insurers may hold instruments classified as debt that carry equity-like economic risk. The principles-based bond definition, effective January 1, 2025, creates a rebuttable presumption that debt collateralized by equity interests does not qualify as a bond, although structures backed by predictable private credit cash flows can still qualify for Schedule D reporting. At its August 12, 2026 summer national meeting, the SAPWG exposed revisions to bond accounting rules targeting what it terms "multi-collateral structured credit investments," and supporting materials signaled a broader follow-on project on reporting refinements for feeder funds and other fund finance, according to NAIC documents. Moody's and the article note that a significant change to RNF statutory treatment would reduce the capital efficiency driving adoption and could alter insurers' investment strategy, product pricing and capacity to write business.
The appeal lies in capital treatment. Because the rated notes qualify as bonds under statutory accounting, an A2-rated senior note carries a risk-based capital charge of 0.82% under NAIC rules, compared with 30% for a direct fund investment reported on Schedule BA. Private credit, defined broadly to include private placements and mortgage loans, accounted for an estimated 35% of US life insurance investments at year-end 2025 according to Moody's, and the NAIC estimates US insurers held approximately $1.2 trillion in private credit, roughly 13% of cash and invested assets, at the end of 2025.
Moody's identifies structural risks. RNF ratings are typically issued on a private letter basis, so ratings rationale and underlying portfolio details are not publicly disclosed, limiting independent assessment by regulators, counterparties and analysts. Moody's also notes that credit protections such as subordination, overcollateralization and cash sweep triggers are only as reliable as the asset valuations that activate them, and those valuations are typically set by the general partner or fund administrator with limited independent verification. Moody's cautions that RNFs have not been tested through a full credit cycle, having grown during broadly benign conditions. Proskauer's Private Credit Default Index recorded 2.73% in Q1 2026, up from 1.84% in Q3 2025, before easing to 2.51% in Q2 2026.
The NAIC's Statutory Accounting Principles Working Group has reviewed RNF structures over several years. The central concern is that insurers may hold instruments classified as debt that carry equity-like economic risk. The principles-based bond definition, effective January 1, 2025, creates a rebuttable presumption that debt collateralized by equity interests does not qualify as a bond, although structures backed by predictable private credit cash flows can still qualify for Schedule D reporting. At its August 12, 2026 summer national meeting, the SAPWG exposed revisions to bond accounting rules targeting what it terms "multi-collateral structured credit investments," and supporting materials signaled a broader follow-on project on reporting refinements for feeder funds and other fund finance, according to NAIC documents. Moody's and the article note that a significant change to RNF statutory treatment would reduce the capital efficiency driving adoption and could alter insurers' investment strategy, product pricing and capacity to write business.
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