Credit analysis & distressed debt

Definition

Credit analysis evaluates whether a borrower will pay — the downside-focused mirror of equity analysis (equity asks how good things can get; credit asks how bad, because a lender’s upside is capped at par). Its toolkit: leverage and coverage ratios, covenant review, capital-structure seniority mapping, and default prediction — Altman’s (1968) Z-score being the foundational quantitative model (a ratio-based discriminant score separating future bankrupts from survivors). Distressed investing extends the discipline to securities of troubled companies, where the analysis becomes VALUATION THROUGH BANKRUPTCY: what does each claim recover under the waterfall, and what is it worth today? Equity traders need the credit lens because the bond market prices solvency continuously — and equity is the FIRST loss.

How it works / structure

• The core metrics stack: leverage (debt/EBITDA — the headline gauge), coverage (EBITDA/interest — distance from distress), maturity WALL mapping (when refinancing must happen — default timing follows maturities, documented), secured/unsecured mix and covenant quality (fa-ratio-analysis supplies the arithmetic; credit applies it pessimistically).
• The waterfall (the distressed core): absolute priority — secured, then unsecured, then subordinated, then preferred, then common equity; Chapter 11 valuation fights are about where VALUE BREAKS in that stack (the “fulcrum security” — the claim that converts to ownership); equity in bankruptcy is usually zero, and the documented meme-era exceptions (Hertz 2021) are exceptions.
• Altman’s Z (engine-relevant): five ratios (working capital, retained earnings, EBIT, market equity vs liabilities, sales — all over assets) weighted into a score; below ~1.8 flags distress zone (original calibration, manufacturing) — the KB carries it as a SCREENING instrument with documented follow-on recalibrations (Z’’, private and non-manufacturer variants), not a verdict.
• The cross-market read: bond prices and ext-cds spreads price default risk in real time — equity/credit DIVERGENCE (stock rallying while its bonds sink) is a documented warning configuration; indicator-credit-spreads carries the market-level version, this entry the issuer level.

When it applies

Levered-equity analysis (any name with debt/EBITDA above ~4x is a credit story wearing an equity ticker — the credit work is mandatory, not optional); distressed and post-reorg situations (style-special-situations — post-bankruptcy equities are a documented neglected class); rating-action anticipation (event-rating-actions — the metrics deteriorate before the agencies move); short theses (maturity walls + coverage erosion = dated catalysts).

Risk profile & failure modes

• Equity-lens optimism (the category error): growth stories don’t pay coupons — applying upside-weighted analysis to leveraged names misses that credit math is about the LEFT tail exclusively.
• Z-score misapplication: original calibration is 1960s manufacturing — applying it raw to banks, insurers, or asset-light software mislabels; variant selection and era recalibration are mandatory (quant-data-hygiene).
• Waterfall surprises: priming, collateral stripping, and liability-management exercises (documented modern practice — “creditor-on-creditor violence”) rearrange recoveries mid-fight; the paper waterfall is a starting map, not a contract guarantee.
• Distressed liquidity: distressed claims trade by appointment — marks are soft, exits are slow, and retail access is largely limited to the equity stub, the WORST seat in the structure.

Evidence & limits

Altman (1968) and its recalibrations anchor default prediction; absolute-priority mechanics are bankruptcy law; equity/credit divergence patterns are documented in the cross-market literature. Recovery estimation is case-specific legal-financial work — the KB carries the framework and flags per-case judgment.

Falsifiable-thesis examples

Illustrations only, not signals:

• “Names entering Z-score distress zone with maturity walls inside 18 months underperform sector peers over the next year (screen-validity check)” — falsified by the cohort spread.
• “Company X refinances its 2027 wall below 9% coupon (solvency thesis — coverage stays viable)” — falsified by the refinancing terms or failure.

Cross-references

• The market-level gauge: indicator-credit-spreads; the derivative: ext-cds
• The arithmetic base: fa-ratio-analysis; the rating machinery: event-rating-actions
• The situational consumer: style-special-situations; the instrument context: ext-bonds-rates