- US credit looks calm on the surface – spreads tight, headline growth cheerful – but the risk has simply migrated. Investment grade (IG), high yield (HY) and private credit are one continuous risk-transfer chain and at every link price has decoupled from fundamentals through a different mechanism: spread compression in IG, weakest links bypassing public HY and net asset value (NAV) smoothing in private credit.
- Softened IG fundamentals and fallen-angel risk expose up to 1/3 of spread. US IG spreads sit at ~75bps – tighter than their pre-Iran-war level – even as credit quality has softened (interest coverage ~6.3x, net leverage ~2.7x), held tight by price-insensitive all-in-yield demand rather than by fundamentals. The specific danger sits at the bottom of IG: a fallen-angel downgrade forces index-constrained holders to sell into a smaller, less liquid HY market, producing spread moves that far exceed the change in credit quality. In stress case like 2020, downgrades eroded 25bps of excess return, which would be equivalent to ~1/3 of current spread. The net upgrade rate has run below zero for roughly three years and actual fallen angels are ticking up, with historically tight spreads leaving no cushion to absorb the loss.
- HY offers a more defensive risk/reward profile than BBB – but largely due to a composition effect, as the weakest names have migrated out to private credit. HY leverage (~3.8x) and coverage (~2.8x) have held firmer than a deteriorating BBB, helped by shorter duration (3yr vs 7yr for IG) and a cleaner index (BB now >50%, CCC near a 20-year low). But much of that strength is a composition effect: the weakest borrowers have migrated out to leveraged loans and private credit. The risk was not removed – it was relocated.
- The same decoupling runs quietly underneath private credit, via NAV smoothing. The migrated borrowers are structurally weaker (leverage 5–7x, coverage 1–2x), and because positions are appraisal-valued, NAVs stay smooth while coverage erodes. Stress therefore surfaces not in price but in the plumbing: Payment-In-Kind has roughly doubled to 8.9% of interest income from a 4.3% trough in early 2023, and lender takeovers reached USD39.4bn across 2025–26 – about three times the prior three years combined, though still low single digits against a ~USD1.75trn book. The fallen-angel analog here is a gate or restructuring, not a downgrade – lumpy and deferred – concentrated in software/AI-exposed names (~25% of portfolios) and the 2021–23 vintage.
- For investors, carry rewards holding but requires selectivity as vulnerabilities concentrate in the lower-rated buckets – BBB in IG, CCC in HY, and the 2021–23 private-credit vintage. All-in USD IG yields near 5.2% can largely offset a 30–50bps spread widening, while the pure excess return offers only a thin cushion for 10bps widening – basically at the mercy of normal volatility.
- Above all, in a stress event the risk that left public HY can return to it. Crowded private-credit positions are hard to exit quickly, so when investors need to de-risk they sell the most liquid instrument first – public HY – regardless of its own fundamentals. Public HY therefore becomes the involuntary shock absorber, and its spreads widen as a liquidity and basis effect rather than a credit-quality one.