Definition
Investment grade versus high yield is the standard credit-quality classification for corporate bonds, dividing them into investment-grade bonds — rated at or above the BBB minus / Baa3 threshold by the major rating agencies — and high-yield bonds rated below that threshold.
Why it matters
The classification is the most-referenced dividing line in the corporate bond market. Investment grade bonds trade in one regulatory and analytical universe; high yield bonds trade in another. The distinction determines what many institutional investors can hold, what capital charges insurance companies incur against different bonds, how bond indexes are constructed, and what yield-and-risk profile a bond delivers. For lifetime income arrangements, the classification bears directly on the composition of insurer general accounts and the credit risk profile of the assets backing the contracts.
How it works
The three major nationally recognized credit rating agencies — S&P Global Ratings, Moody's, and Fitch — publish letter-grade ratings on corporate and structured bonds. The investment grade threshold is BBB minus (S&P and Fitch) or Baa3 (Moody's); ratings at or above these thresholds are investment grade, and ratings below are high yield (also called speculative grade, non-investment grade, or, informally, junk). Investment grade is further subdivided into ratings from AAA (the highest) down through BBB minus; high yield subdivides from BB plus down through C and D categories, with D signaling actual default. For example, investment-grade corporate spreads over Treasuries in the 10-year maturity range typically trade in the 100-to-200 basis point range in stable conditions, while high-yield spreads typically trade in the 300-to-500 basis point range; during stress the two categories can behave quite differently, with high-yield spreads widening much more sharply than investment-grade spreads. Regulatory capital treatment differs — insurance companies hold more risk-based capital against high-yield bonds than against investment-grade bonds of the same maturity, and various institutional mandates restrict holdings to investment grade only.
In practice
For individuals, the investment grade / high yield distinction structures how corporate bond funds are marketed and how portfolio allocations are commonly discussed. An investment-grade bond fund holds only bonds at or above the BBB minus threshold; a high-yield bond fund holds bonds below that threshold and typically yields more, with correspondingly greater principal volatility and default exposure. Retirement portfolios often include some investment-grade exposure and limited high-yield exposure, with the exact mix depending on the individual's risk tolerance and horizon. For lifetime income products, the classification is largely invisible to the buyer but is one of the primary variables in the credit composition of the insurer's general account: carriers with heavier high-yield exposure earn higher yields on those assets but bear more credit risk against the contracts they issue.
In the Longevity Standard Framework
Investment grade versus high yield is supporting vocabulary in the Longevity Standard framework, characterizing the credit-quality dimension of insurer general account composition that underlies the pricing and risk profile of asset-backed claims. General account solvency and counterparty risk depends in part on the credit-quality mix of the assets backing the arrangement — a carrier whose general account holds more of its investments in high yield and other higher-risk credit segments can support more competitive product pricing through higher yields on assets, but carries more credit risk against the contracts it issues. In monitoring of PE-owned carriers and the migration of general accounts toward higher-yielding asset classes, the investment grade / high yield boundary is one of the classifications through which the shift is quantified.
Related terms
- Credit spread
- Investment yield
- General account
- Asset-backed claim
- Yield enhancement strategy
- Alternative asset concentration
- Spread compression
- Risk-based capital