High-Yield Bond

A high-yield bond is a corporate bond rated below investment grade — BB+ or lower — issued by companies with real default risk: heavily indebted, cyclical, young, or recently fallen from grace. The market pays you visibly for that risk: coupons and yields several percentage points above safe bonds, historically 3–5% extra in calm times and 10%+ in panics.

The asset class was effectively invented in the 1980s, when Michael Milken's desk at Drexel Burnham turned an odd-lot backwater of "fallen angels" into a primary market: companies could now issue speculative-grade debt at scale, which financed the LBO boom, a generation of telecom and cable buildouts — and Drexel's own indictment. The market matured; the nickname "junk" stuck.

Behaviourally, high yield is a hybrid: it pays coupons like a bond but sells off with equities in recessions, because both price the same question — will this company survive? A high-yield fund is closer to a defensive equity position than to a government bond portfolio, whatever the word "bond" suggests.

The arithmetic of the spread

The spread must cover expected default losses, with the remainder as risk premium:

Long-run HY default rates average ~3–4% a year (peaking above 10% in recessions) with recoveries near 40%: expected loss ≈ 2%. Historical spreads averaged ~4–5% — the difference is why diversified high yield has beaten investment grade over most long windows, and the crises are why it hasn't felt like it.

Structural features that define the market

• Callable, almost always: issuers can refinance after 3–5 years at declining premiums — your upside is capped near the call price, so bonds trade on yield-to-worst, not yield-to-maturity.
• Covenants: HY indentures restrict extra debt, dividends and asset sales — protections IG bonds don't need and HY investors negotiate hard for (and have been losing gradually for a decade; "covenant-quality scores" track the erosion).
• Ratings tiers: BB behaves like almost-IG; single-B is the market's core; CCC is equity in a bond costume, driving most of the index's defaults and most of its recovery-rally upside.
• Fallen angels vs. original issue: bonds demoted from IG have historically outperformed same-rated original-issue HY — forced selling at the downgrade creates the entry price.

Yield-to-worst and negative convexity

With call schedules attached, the bond's value is a min over call scenarios:

Tightening spreads push prices into the call ceiling — upside convexity is sold to the issuer. The consequence: HY total returns are carry-dominated; capital-gain rallies are structurally capped while drawdowns are not. Effective duration is also spread-dependent — as spreads widen, expected calls vanish and duration extends, exactly when you least want it.

Distress mechanics

• The distress boundary: bonds beyond ~1000bp trade on recovery, not yield — price becomes (probability-weighted) expected recovery, and the analysis shifts to capital structure: what's above you, what's the collateral, where does value break.
• Liability management: the modern loosening of covenants enabled "creditor-on-creditor violence" — drop-down financings (J.Crew), uptiering (Serta) — where subsets of holders exchange into senior claims and strand the rest. Reading the docs is now alpha, not diligence.
• Recovery cyclicality: recoveries fall exactly when defaults spike (same recession), so expected loss is convex in the cycle — Moody's data show recovery on senior unsecured dropping from ~45% in calm years to ~25% in crisis years.

The index-liquidity mismatch

HY ETFs offer minute-by-minute liquidity on bonds that trade by appointment. In March 2020 the big ETFs traded at 3–5% discounts to stale NAVs — functioning, as later analysis conceded, as the price-discovery vehicle rather than the anomaly. The Fed's corporate-credit facilities (SMCCF), which bought HY ETFs directly, ratified the structure: the wrapper is now systemically load-bearing.

The formulas above are standard textbook formulations, simplified for teaching. They explain the mechanism — they are not a valuation tool, and they will not reproduce a dealer’s price.