Unlike public bond ratings, private credit assets on insurer balance sheets are assessed using non-public "private letter ratings." This opacity, combined with skewed rating agency incentives, leads to the overvaluation of these assets, obscuring true portfolio risk from regulators.

Large banks have offloaded riskier loans to private credit, which is now more accessible to retail investors. According to Crossmark's Victoria Fernandez, this concentration of risk in a less transparent market, where "cockroaches" may be hiding, is a primary systemic concern.

The complex, state-by-state guarantee fund system designed to handle insurer insolvencies has never been used for a major national insurer with hundreds of billions in assets. Its ability to manage a large failure in a systemic crisis is entirely theoretical and unproven.

Because insurers only pay into guarantee funds after a failure occurs, a struggling firm has no disincentive for taking on excessive risk. They are not charged a higher premium for their behavior, creating a moral hazard that contrasts with the FDIC's risk-based system for banks.

Due to the private credit market's opaqueness, complexity, and hidden interconnectedness, any significant credit event would likely trigger a 'sudden stop' liquidity event. This poses a greater systemic risk than a slow, corrosive problem, as it could catch regulators completely off guard.

While the private credit sector faces stress, its potential to trigger a systemic banking crisis is low. Banks' aggregate loan exposure to these institutions is a small percentage of total assets, and they are not on the front line for losses, which are first absorbed by fund investors.

Lloyd Blankfein argues the real danger in private credit isn't its illiquidity but its expansion into retail products like 401(k)s. Regulators will tolerate institutions losing money, but they act decisively when the wealth of voters (citizens and taxpayers) is threatened.

While most US economic cycles appear healthy, the opaque private credit market represents the most significant systemic risk. Recent signs of stress, such as fund redemption limits and high exposure to volatile sectors like software, are reminiscent of the "contained" problems that preceded the 2008 financial crisis.

Unlike the FDIC, state insurance guarantee funds are post-funded. Surviving insurers pay for a failed competitor's losses but then receive state tax credits for these payments. This structure creates an automatic, taxpayer-funded bailout without any legislative action.