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Corporate Bond Basics and Credit Quality

Corporate, guaranteed, high-grade, investment-grade, high-yield, junk, and taxable bond terms.

Corporate bond basics and credit-quality terms describe company debt by issuer type, rating tier, yield category, tax status, and guarantee support.

Use this branch when the main question is how risky or credit-sensitive a corporate bond is.

Key Terms in This Branch

TermWhat it clarifies
Corporate BondA debt security issued by a company.
Guaranteed BondA bond supported by a guarantee under stated terms.
High-Grade BondA higher-quality bond category.
Investment-Grade BondA bond rated in an investment-grade category.
High-Yield BondA below-investment-grade or higher-spread corporate bond.
Junk BondA colloquial term for speculative-grade debt.
Taxable BondA bond whose interest is taxable under the relevant rules.

Common Mistakes

  • Assuming investment grade means no loss risk.
  • Ignoring guarantee scope and guarantor credit.
  • Treating high-yield spread as pure extra income.
  • Comparing taxable and tax-advantaged bonds without after-tax yield.

In this section

Choose a subsection first. Deeper term pages live inside each subsection, which keeps large topic hubs readable.

Corporate Bond

A corporate bond is debt issued by a company to raise capital, with pricing driven by coupon, maturity, seniority, and credit risk.

Guaranteed Bond

A guaranteed bond has principal and interest supported by another party, so investors evaluate both issuer risk and guarantor strength.

High-Grade Bond

A high-grade bond carries one of the strongest credit ratings, usually AAA or AA, and typically offers lower yields than riskier bonds.

High-Yield Bond

A high-yield bond is below investment grade, so investors demand higher yields for greater default, downgrade, and liquidity risk.

Investment-Grade Bond

An investment-grade bond carries a relatively strong credit rating, making default risk, yield spread, and portfolio eligibility central to analysis.

Junk Bond

A junk bond is a below-investment-grade debt security with higher credit risk and usually higher yield than investment-grade bonds.

Taxable Bond

A taxable bond pays interest that is generally subject to income tax, making after-tax yield the relevant comparison measure.

Revised on Sunday, June 21, 2026