The primary threat to the high-yield market isn't a wave of corporate defaults, but rather a reversion of the compressed risk premium that investors demand. This premium has been historically low, and a return to normal levels presents a significant valuation risk, even if fundamentals remain stable.

In 1935, amidst massive economic uncertainty following the Great Depression, a new AA-rated corporate bond yielded just 70 basis points over Treasurys. This historical precedent, nearly identical to today's spreads, shows that low credit spreads are not necessarily a sign of complacency and can persist even if economic conditions worsen, challenging typical risk-pricing assumptions.

Don't wait for public credit spreads to blow out as a warning sign. In a system where sovereign debt is the primary vulnerability and corporates are easily bailed out, credit spreads have become a coincident, not leading, indicator. The real leverage risk is hidden in private credit.

The credit market appears healthy based on tight average spreads, but this is misleading. A strong top 90% of the market pulls the average down, while the bottom 10% faces severe distress, with loans "dropping like a stone." The weight of prolonged high borrowing costs is creating a clear divide between healthy and struggling companies.

With corporate credit spreads at historically narrow levels, investors are not being compensated for the inherent risk. In Richard Bernstein's career, spreads have only been this tight three previous times, each preceding a major credit crisis or market scare (late 1990s, mid-2000s, 2021-22). This suggests a poor entry point for credit.

An extensive study of 4 million scenarios by Acadian shows that market timing strategies for credit—exiting when spreads are tight and re-entering when wide—underperform a simple buy-and-hold approach approximately 70% of the time. The roll-down return from the yield curve is consistently underestimated.

Credit spreads are becoming an unreliable economic signal. The shift of issuance to private markets reduces the public supply, while the Federal Reserve's 2020 intervention in corporate debt markets permanently altered how investors price default probability.

Judging the credit market by its overall index spread is misleading. The significant gap between the tightest and widest spreads (high dispersion) reveals that the market is rewarding quality and punishing uncertainty. This makes individual credit selection far more important than a top-down market view.

The common practice of bifurcating credit portfolios into 'investment grade' and 'high yield' is an artifact of historical benchmarks and institutional mandates, not an economically optimal approach. A purely systematic view would blend them based on risk characteristics.