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Corporate Bonds

Investment Grade vs High Yield

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Investment Grade vs High Yield

The boundary between investment grade and high yield sits at the BBB/Baa3 rating line. Above it, bonds are presumed safe enough for pension funds and insurance companies. Below it, they are speculative, with material default risk.

Key takeaways​

  • Investment grade (BBB/Baa3 and above) includes roughly 60–70% of outstanding corporate debt in developed markets
  • High yield (BB/Ba2 and below) carries default rates of 2–5% per year during normal cycles, 10%+ in recessions
  • The BBB/BB boundary marks the largest credit spread; BBB bonds trade 200–400 basis points over Treasuries, BB bonds 500–700
  • Investment-grade defaults are rare and often involve specific company crises, not macro downturns
  • High-yield funds and indices (like HYG, ANGL) provide access without need to pick individual companies

What investment grade means​

A bond rated BBB (S&P) or Baa3 (Moody's) or their equivalents carries adequate capacity to meet financial commitments under normal economic conditions. The "adequate" threshold is the boundary where institutional investors (pension funds, insurance companies, mutual funds) are permitted to hold the securities.

Major institutional investors operate under mandates: they may only hold investment-grade bonds. This creates a hard boundary. A company just below BBB (like many auto suppliers, struggling retailers, or overleveraged private-equity buyouts) faces a far larger universe of potential buyers if it achieves BBB than if it remains BB.

Investment-grade corporate bonds include:

  • AAA/Aaa: Minimal credit risk (Microsoft, Johnson & Johnson, Apple, Coca-Cola)
  • AA/Aa: Very strong; rare defaults (Nestlé, Procter & Gamble, many utilities)
  • A/A: Strong; occasional defaults in specific crises (most large industrial companies)
  • BBB/Baa3: Adequate; cyclical sensitivity; 0.1–0.3% annual default rates during stability

From 2010 to 2019, investment-grade default rates averaged under 0.1%. Even in 2020, with COVID-19, investment-grade defaults were under 0.5% of the market. Individual defaults still occurred (Chesapeake Energy, Bed Bath & Beyond, some retail), but they were company-specific, not systemic.

What high yield means​

High-yield bonds (BB/Ba2 and lower) are issued by companies with:

  • High leverage (debt/EBITDA ratios above 4–5x)
  • Cyclical or volatile earnings (airlines, casinos, restaurants)
  • Unproven business models (early-stage, high-growth companies)
  • Distressed situations (restructuring, turnarounds)
  • Private-equity backed buyouts (often financed 60%+ with debt)

From 2010 to 2019, high-yield default rates averaged 2–3% per year. During the 2008 financial crisis, the default rate spiked to 10%+. In 2020, it reached 5%. Recessions and sharp credit crunches dramatically accelerate defaults.

A typical high-yield bond might be issued by:

  • Airlines: High fixed costs, cyclical demand (Southwest, Spirit)
  • Retailers: Debt-laden, declining foot traffic (Bed Bath & Beyond, Rite Aid, Bed Bath & Beyond)
  • Gaming and hospitality: High leverage, demand sensitive to employment and confidence (Las Vegas operators, cruise lines)
  • Energy: Commodity exposure, project-based cash flows (oil and gas exploration companies)
  • Telecom: Mature but consolidated, historically leveraged (Comcast, Charter Communications)

These industries are not inherently bad investments, but they carry measurable default risk. A bondholder must accept the possibility of a 10–50% loss if the company's cash flow deteriorates.

The credit spread and compensation​

The difference in yield between a high-yield bond and a Treasury is the credit spread. In early 2024:

  • A 10-year Treasury yields roughly 4%
  • A BBB corporate bond (investment-grade) yields roughly 5.2% (120 basis points over Treasuries)
  • A BB bond (high-yield) yields roughly 6.8% (280 basis points over Treasuries)
  • A B bond yields roughly 8.0%+ (400+ basis points)

That spread compensates for:

  1. Expected default loss: If a bond has a 3% annual default probability and recovers 50 cents on the dollar, expected loss is 1.5% per year
  2. Liquidity premium: High-yield bonds trade with wider bid-ask spreads; investors demand compensation for harder-to-exit positions
  3. Volatility: High-yield bond prices swings are 2–3x larger than investment-grade during credit events
  4. Scarcity value: In tight credit markets, high-yield spreads widen dramatically as investors flee risk

During the 2008 crisis, high-yield spreads exceeded 2,000 basis points (20%) as credit markets froze. In March 2020, spreads approached 1,200 basis points before policy intervention. Normal times see 300–600 basis point spreads.

Performance during downturns​

In equity bear markets, investment-grade corporates typically decline 5–15% as yields rise, but continue paying coupons. High-yield bonds decline 20–40%, with some defaults. A recession historically sees 5–8% default rates on high-yield bonds.

The 2008 crisis showed this starkly. LQD (investment-grade corporate ETF) fell roughly 15% peak-to-trough; HYG (high-yield ETF) fell roughly 50%, with many underlying bonds defaulting completely.

This makes investment-grade corporates suitable for conservative allocations (60/40 balanced portfolios, bond sleeves of target-date funds), while high-yield is appropriate only for investors with:

  • Long time horizons
  • Ability to hold through 20–40% drawdowns
  • Diversified positions (not concentrated bets)
  • Acceptance that some holdings will default

Access via funds and indices​

Most individual investors should not buy corporate bonds directly. Instead, they use:

  • LQD (iShares Investment Grade Corporate Bonds): ~700 holdings, averaged BBB+ rating, low cost
  • AGG (iShares Core U.S. Aggregate Bond Index): Blended index including Treasuries, agency, investment-grade corporates, mortgage-backed securities
  • BND (Vanguard Total Bond Market Index Fund): Similar diversification to AGG, similar low costs
  • HYG (iShares High Yield Corporate Bond ETF): ~600 high-yield holdings, BB average rating
  • ANGL (iShares Fallen Angels High Yield Bond ETF): Companies that lost investment-grade status, often lower-cost than generic high-yield

A fund approach gives instant diversification. Holding 20 individual bonds exposes you to the risk that one company's specific crisis wipes out that position. A fund with 500+ positions spreads that risk across many issuers.

Decision tree: Investment grade or high yield?​

Next​

Within investment-grade corporate bonds, priority in bankruptcy is key. Senior bonds are repaid before subordinated debt. Secured bonds are repaid before unsecured. These details affect recovery rates and pricing.