Counterintuitively, high-yield corporate bonds are expected to perform better than investment-grade credit. They do not face the same supply headwind from AI-related debt issuance, and their fundamentals are supported by credit team forecasts of declining default rates over the next 12 months.

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Given the outlook for increased debt issuance from large US corporations to fund expansion, Morgan Stanley sees better opportunities in assets less exposed to this trend. They favor high yield bonds over investment grade and believe European credit may outperform as it lags the US "animal spirits" theme.

Default rates are not uniform. High-yield bonds are low due to a 2020 "cleansing." Leveraged loans show elevated defaults due to higher rates. Private credit defaults are masked but may be as high as 6%, indicated by "bad PIK" amendments, suggesting hidden stress.

The massive ~$1.5 trillion in debt financing required for AI infrastructure will create a supply glut in the investment-grade (IG) bond market. This technical pressure, despite solid company fundamentals, makes IG bonds less attractive. High-yield (HY) bonds are favored as they don't face this supply headwind and default rates are expected to fall.

The sheer volume of debt needed to fund AI infrastructure will likely widen spreads in investment-grade bonds and related ABS. This supply pressure creates an opportunity for outperformance in insulated sectors like US high-yield and agency mortgage-backed securities.

Despite forecasting a massive surge in bond issuance to fund AI and M&A, Morgan Stanley expects credit spreads to widen only modestly. This is because high-quality, highly-rated companies will lead the issuance, and continued demand from yield-focused buyers should help anchor spreads.

The high-yield market's credit quality is at an all-time high, not due to broad economic strength, but because of a massive influx of 'fallen angels.' Downgrades of large, formerly investment-grade companies like Ford and Kraft Heinz have structurally improved the overall quality of the index.

A significant shift in corporate finance strategy has occurred: companies no longer universally strive for an investment-grade (IG) rating. Many firms, including 'fallen angels' downgraded from IG, are content to operate with a high-yield rating, finding the higher borrowing costs acceptable for their business models.

Despite higher spreads in the loan market, high-yield bonds are currently seen as a more stable investment. Leveraged loans face risks from LME activity, higher defaults, and investor outflows as the Fed cuts rates (reducing their floating-rate appeal). Fixed-rate high-yield bonds are more insulated from these specific pressures.

A surge in investment-grade bond issuance to fund AI capital expenditures will insulate the high-yield market. This technical factor is expected to drive high-yield bond outperformance versus higher-quality corporate bonds, which will face supply pressure.

The gap between high-yield and investment-grade credit is shrinking. The average high-yield rating is now BB, while investment-grade is BBB—the closest they've ever been. This fundamental convergence in quality helps explain why the yield spread between the two asset classes is also at a historical low, reflecting market efficiency rather than just irrational exuberance.