Introduction
Notching is a credit‑rating practice used by rating agencies to assign different ratings to different obligations issued by the same company (or closely related entities). Differences in security, priority of claim, legal structure and recoverability cause some instruments to be rated higher or lower than an issuer’s baseline rating. Notching helps investors compare risk across bonds and tranches from the same borrower and helps issuers understand how capital‑structure choices affect borrowing costs.
Key takeaways
– A “notch” is one step on a rating scale; agencies may “notch up” (higher credit quality) or “notch down” (lower) an instrument relative to the issuer’s baseline.
– The baseline is typically the corporate family rating (CFR) or the issuer’s senior unsecured debt rating.
– Notches reflect differences in security (secured vs. unsecured), subordination (senior vs. junior), guarantees, legal enforceability, and expected recovery in default.
– Rating agencies commonly limit notching around the baseline (e.g., ±1–2 notches), but may go further where circumstances justify it (structural subordination, weak recoveries, ring‑fencing).
– Notching applies both to corporate debt and to structured finance tranches (e.g., CDOs, securitizations).
What is a notch in bond rating?
A notch is the unit of difference between two credit ratings on an agency’s scale (for example, from A to A‑ is one notch, from A to BBB+ another). When securities issued by the same economic group have different risk characteristics—seniority, collateral, legal claim priority—their ratings are adjusted up or down from the baseline to reflect those differences. For example, subordinated debt typically is notched down relative to senior unsecured debt because it ranks lower in repayment priority and tends to have lower recovery in default.
Why notching matters
– Investment decisions: Notching gives a quick, comparable signal of relative default/recovery risk within an issuer’s capital structure.
– Pricing and yield: Lower‑rated tranches require higher yields to compensate investors for incremental risk.
– Structure and financing choices: Issuers can influence funding costs by changing security, guarantees, or legal structure to reduce negative notching.
– Regulatory and covenant impact: Rating changes and notch movements can trigger covenant events, credit lines, and regulatory capital implications.
How notching works — core principles
1. Baseline: Agencies pick a reference rating (commonly the issuer’s CFR or senior unsecured rating) from which they notch.
2. Drivers of notching:
• Security/collateral: Secured claims may be notched up; unsecured or unsecured‑subordinated claims down.
• Subordination: Lower priority claims are usually notched down.
• Guarantees and structural links: Full, unconditional guarantees can reduce or eliminate notches; weak or partial guarantees may still leave notches.
• Structural subordination: Debt issued at a holding company can be notched down relative to debt at asset‑owning subsidiaries because cash flows must flow through the subsidiary first.
• Legal and jurisdictional issues: Legal enforceability and creditor rights can affect notching.
• Expected recovery rates: Instruments expected to recover a higher share in default may be notched higher.
3. Typical range: Many agencies often apply modest notching (e.g., +/- 1–2 notches) from the baseline in standard situations, expanding the range when specific structural or credit issues warrant.
Moody’s (2017) update to notching guidance (summary)
Moody’s issued updated guidance (building on 2007 methodology) clarifying when it will notch instruments relative to an obligor’s baseline rating. Key points (paraphrased):
– The baseline is usually the issuer’s senior unsecured rating or CFR.
– In most cases, instruments are notched within a limited range (commonly −2 to +2 notches).
– Moody’s will notch beyond that range in certain situations, such as extraordinary differences in loss severity, strong ring‑fencing, creditor hierarchy anomalies, or other structural/legal distinctions that materially change expected recovery.
Tranche notching (structured finance)
In securitizations and CDOs, notching is applied across tranches:
– Senior tranches (first loss protections, highest repayment priority) receive the highest ratings.
– Mezzanine tranches are notched down from senior tranches depending on the size of subordination and expected loss.
– Equity or first‑loss tranches receive the lowest ratings (or are unrated).
Notching here depends on factors such as collateral quality, concentration, credit enhancement levels, diversification, and stress‑case modeling of defaults and recoveries.
Subordination‑based notching (holding company vs. operating subsidiary)
When debt is issued at different legal entities in a corporate group:
– Debt of an operating subsidiary that directly owns assets and cash flows is often rated higher than debt issued at a parent or holding company because the holding company’s creditors are structurally subordinated.
– Agencies therefore may notch down holding‑company debt relative to subsidiary debt (structural subordination), sometimes by multiple notches if the intercompany claims and upstreaming of cash are restricted.
What is a notch downgrade?
A notch downgrade occurs when a security’s rating is lowered by one or more notches. Downgrades occur when the issuer’s creditworthiness deteriorates or when specific security features become less protective. Consequences include higher funding costs, mark‑to‑market losses for holders, potential covenant breaches, and broader market perception effects.
Practical, step‑by‑step guidance
For investors (fixed income portfolio managers, advisors, private investors)
1. Identify the baseline:
• Start with the issuer’s corporate family rating or the rating on senior unsecured debt (if available).
2. Map instrument specifics:
• Determine seniority (senior vs. subordinated), security (secured vs. unsecured), guarantees, and legal issuer (parent vs. subsidiary).
3. Check agency notching:
• Look up the rating agency reports for explicit notching explanations. Agencies typically state the reason for any deviation from the baseline.
4. Estimate recovery and loss severity:
• Consider collateral, expected recovery rates, and covenants. Lower expected recoveries justify larger downward notches.
5. Compare across agencies:
• Different agencies may notch differently. Review Moody’s, S&P, Fitch, and issuer disclosures.
6. Price the spread:
• Translate rating differentials into yield spreads using market data or rating‑to‑spread matrices to see if compensation is adequate.
7. Stress test scenarios:
• Model default and recovery under adverse conditions to evaluate potential losses by instrument.
8. Monitor ongoing:
• Watch rating outlooks, credit watch listings, covenant triggers and issuer actions (asset disposals, upstreaming restrictions).
For issuers and corporate treasurers
1. Understand how your capital structure affects notching:
• Identify which layers of debt could be notched down (holding‑company debt, hybrids, subordinated notes).
2. Use structural tools to reduce negative notching:
• Provide guarantees, security, or intercompany support to elevate the legal claim where feasible.
• Consider issuing debt at the subsidiary level if assets and cash flows better match the obligation.
3. Pay attention to covenants and legal enforceability:
• Clear, enforceable guarantees and intercreditor arrangements reduce uncertainty and can limit notching.
4. Communicate proactively with rating agencies:
• Provide detailed legal opinions, cash‑flow waterfalls, and restructuring plans to explain expected recoveries.
5. Optimize funding mix:
• Use secured debt, collateralized facilities, or credit wraps to reduce effective risk for certain investors.
6. Monitor ratios and liquidity:
• Maintain covenant headroom and liquidity to avoid issuer‑level downgrades that could cascade through notched instruments.
Examples (illustrative)
– Corporate example: Issuer X has a CFR of A. Its senior unsecured bond receives an A rating (baseline), while its subordinated bond—because it ranks below senior creditors—may be notched down to A‑ or BBB+. The exact number of notches depends on structural factors and agency judgment.
– Structured finance example: A mortgage securitization with 10% credit enhancement might have the senior tranche rated AAA, mezzanine rated BBB, and equity unrated; the mezzanine rating is “notched” down from the senior rating reflecting its higher expected loss under stress.
Practical considerations and limitations
– Agency discretion: Notching is driven by agency methodologies and judgment; approaches vary across Moody’s, S&P, Fitch, etc.
– Not a precise science: Notching reflects expectations about loss severity and recoveries, which are inherently uncertain.
– Market pricing matters: Ratings are one input—market spreads, liquidity and covenants can be equally decisive for realized returns.
– Watch for time‑variation: Legal structures, collateral value and operational realities can change, leading to rating revisions and changed notching.
The bottom line
Notching translates differences in security, seniority, legal structure and expected recoveries within a corporate group (or across tranches in structured products) into practical, comparable rating differences. Investors should treat notches as a signal of relative default/recovery risk and incorporate them into pricing, portfolio construction, and stress testing. Issuers can manage notching impacts through legal structure, guarantees, collateral and transparent engagement with rating agencies.
Sources and further reading
– Investopedia — Notching:
– Moody’s Investors Service — Notching methodology update (2017) — Moody’s guidance on notching practices (Moody’s reports and methodology pages)
(1) produce a checklist you can print for due diligence on a particular bond; 2) walk through a numerical example converting notch differences into yield spreads using current market data.)
…for the issuer to access capital, raise borrowing costs, trigger covenant or collateral provisions, and affect the market value of outstanding securities. It can also have knock‑on effects on counterparties, derivatives, and investor mandates that rely on credit‑rating thresholds.
Below I continue and expand the discussion with added sections, examples, practical steps for investors and issuers, and a concluding summary.
Source: Investopedia — Notching and rating‑agency published methodologies (Moody’s, S&P) as referenced therein.
Implications of Notch Downgrades
– Higher financing costs: Lower ratings typically mean higher yields demanded by investors. A downgrade by one or more notches can increase interest expense on newly issued debt and raise the cost of refinancings.
– Covenant, default and cross‑default risk: A notching downgrade of certain obligations can trigger financial covenant breaches or cross‑default provisions, accelerating other liabilities.
– Portfolio and regulatory effects: Some investors and funds are restricted to investment‑grade securities. A notching downgrade that pushes an instrument below a threshold can force sellers and widen liquidity stress. Banks and insurers also face capital and regulatory treatment that depends on ratings.
– Market value and liquidity: Lower ratings often reduce marketability of debt (especially for subordinated or structured tranches), increasing bid‑ask spreads and depressing market prices.
– Counterparty and derivative impacts: Ratings determine initial margin and collateral calls in some derivatives contracts; a downgrade can increase collateral requirements or change counterparty risk assessments.
How Rating Agencies Determine Notches — Key Drivers
While methodologies differ by agency, the main factors that produce notching between obligations of the same group include:
– Priority in capital structure: senior secured > senior unsecured > subordinated > preferred equity.
– Collateral and security: presence and quality of collateral support higher notches.
– Structural subordination: debt issued at holding‑company level is generally junior to operating‑company creditors that have direct access to cash flows.
– Guarantees and ring‑fencing: full, unconditional guarantees or upstreaming agreements can reduce or eliminate negative notches; partial or conditional guarantees often lead to limited notching benefit.
– Legal and jurisdictional separation: insolvency laws, creditor rights and enforceability can affect recovery estimates and thus notching.
– Recovery expectations: estimated recovery rates in default drive the number of notches applied.
– Liquidity and short‑term support features: committed facilities or liquidity arrangements can influence short‑term notching.
Moody’s Updated Notching Guidance (summary)
– Moody’s historically set the obligor’s senior unsecured debt or the corporate family rating (CFR) as the base for notching (base = 0).
– In many cases Moody’s applies a +/- 2‑notch range relative to the CFR for individual obligations, but may notch further outside that range in certain circumstances (e.g., deeply subordinated instruments, very strong collateral support, intra‑group structured features, or legal/contractual complexities).
– Refer to the specific Moody’s methodology note for exact criteria and examples when assessing a particular instrument.
Tranche Notching in Structured Finance
– Structured products (CDOs, RMBS, CLOs) are divided into tranches with different seniority and credit enhancement.
– Notching among tranches reflects subordination levels: senior tranches get higher ratings; mezzanine lower; equity or first‑loss tranches often receive unrated/lowest ratings.
– Agencies model stress/default scenarios and recovery waterfalls to estimate expected losses for each tranche and map those expectations to ratings (tranche notching).
– Practical investor takeaway: understand the attachment/detachment points, credit enhancement, and stress assumptions that produced the rating differences among tranches.
Practical Steps — For Investors Evaluating Notching Risk
1. Identify the specific obligation you are buying (issuer name alone is not enough).
2. Read the prospectus and indenture to determine seniority, collateral, security, guarantees, subordination, and covenants.
3. Consult the issuer’s capital‑structure chart and recent rating reports from agencies; note the corporate family rating (CFR) and ratings on different liabilities.
4. Review the rating agency’s methodology relevant to that issuer or instrument (e.g., Moody’s rating symbols, S&P’s structural subordination approach).
5. Model recovery estimates and stress scenarios: how would cash flows be allocated in a default? Which creditors are ahead in the waterfall?
6. Check legal and jurisdictional issues: are subsidiaries ring‑fenced? Are guarantees enforceable and unconditional?
7. Consider market liquidity and investor base: subordinated or deeply notched paper may have fewer potential buyers.
8. Monitor covenants and triggers: understand events that could cause a shift in notching (e.g., upstreaming restrictions, dividend capacity limits).
9. Evaluate portfolio impact: determine whether rating changes could force sales under mandates that require minimum ratings.
10. Seek specialist counsel for complex structures and structured products (legal and recovery analyses matter).
Practical Steps — For Issuers Seeking to Optimize Ratings (and Minimize Negative Notching)
1. Clarify desired funding entity: issue at operating‑company level if possible to access higher seniority rating.
2. Use explicit, unconditional guarantees or parent support agreements to bridge rating differences (but note agencies will assess likelihood of support).
3. Provide collateral or security for debt to reduce subordination and potential negative notches.
4. Structure intercompany arrangements to facilitate upstreaming of cash flows (e.g., dividend policies, intercompany receivables).
5. Avoid overly complex structural features or ring‑fencing that agencies may view as increasing legal separation risk.
6. Maintain transparent covenant packages and information disclosure to minimize rating agency uncertainty.
7. Consider credit enhancement (letters of credit, insurance) where cost‑effective.
8. Engage early with rating agencies during deal design to understand likely notching outcomes.
Illustrative Examples (Simplified)
Example 1 — Holding Company vs. Operating Subsidiary
– Operating Company (OpCo) generates cash flows and directly holds assets. OpCo issues a senior unsecured bond rated A.
– Holding Company (HoldCo) issues debt that is structurally subordinated: its creditors can only be paid from upstreamed cash after OpCo obligations and operational needs are satisfied.
– Rating outcome: OpCo senior unsecured = A (base), HoldCo senior unsecured might be notched down to BBB or BBB+ depending on expected upstreaming, guarantees, and legal support. This reflects increased recovery risk for HoldCo creditors.
Example 2 — Senior vs. Subordinated Notes (single issuer)
– Company X has a corporate family rating of A. It issues:
• Senior secured notes (backed by specific collateral) — may be notched up or pari with CFR depending on security: possibly A or A+.
• Senior unsecured notes — base A.
• Subordinated notes — notched down to BBB or BBB‑ depending on legal subordination and expected recovery.
– Investor implication: subordinated notes will offer higher yield to compensate for additional one or more notches of downgrade risk.
Example 3 — CDO Tranche Notching (conceptual)
– A CLO contains senior, mezzanine and equity tranches. The CLO’s portfolio defaults are modeled; expected portfolio loss is mapped to protection for each tranche.
– Senior tranche: low expected loss → rated AA.
– Mezzanine tranche: moderate expected loss → rated BBB.
– Equity tranche: first loss → unrated or CCC/NR.
– The notching between tranches communicates relative risk and pricing.
Example 4 — Notch Downgrade Triggering Consequences
– A bank’s subordinated debt is downgraded two notches after a profit warning. That downgrade triggers an issuer covenant that increases interest spreads on outstanding revolving credit facilities—or forces immediate repayment—which worsens liquidity pressure and can lead to further downgrades and market instability.
Common Misconceptions
– “All debt of an issuer carries the same rating.” Not true — notching means different instruments by the same issuer can carry different ratings.
– “A corporate rating equals every security’s rating.” Not always — base CFR or senior unsecured rating is a starting point; security features and subordination commonly alter the final rating.
– “Notching is arbitrary.” Rating agencies follow published methodologies, but judgments are involved — notching reflects structural, legal and recovery assessments.
How to Read Notches Practically
– Each notch refers to one step on the rating scale used by an agency (e.g., from A to A‑ is one notch, A‑ to BBB+ is another).
– Multiple notches translate into significant difference in perceived credit risk and therefore yield differentials in secondary markets.
Regulatory and Portfolio‑Management Considerations
– Investment mandates often use ratings rather than issuer names to determine allowable securities; understanding notching avoids unintended mandate breaches.
– Banks and insurers should factor notching into capital calculations and stress testing.
– Basel and other regulatory regimes sometimes apply different risk‑weights to instruments based on rating and subordination.
When Notching Changes — What to Watch For
– Material changes in collateral values or legal structure.
– Issuer insolvency proceedings or changes in local insolvency law.
– New parent guarantees or credit support arrangements.
– Material changes in business risk or cash‑flow generation ability at operating subsidiaries.
– Changes in forecast recovery rates due to macroeconomic shifts.
Checklist for Due Diligence on Notching
– Confirm instrument’s legal documentation: security, subordination, covenants, guarantees.
– Confirm issuer and obligor entity for payments; identify upstreaming mechanisms.
– Obtain and read the most recent rating reports for issuer and related entities.
– Review agency methodology for structured or corporate notching rules.
– Stress test scenarios for default and recovery sequencing.
– Consider liquidity buffer and exit strategies if rating‑sensitive.
Concluding Summary
Notching is a central concept in credit analysis that allows rating agencies to reflect differences in credit risk among obligations of the same issuer or group. It translates legal priority, collateral, guarantees, and structural factors into rating steps (notches) that help investors compare risk, price securities appropriately, and meet mandate constraints. For issuers, understanding how notching works guides capital‑structure decisions and can reduce funding costs if managed well. For investors, careful analysis of the specific obligation (not just the issuer) and the rating‑agency methodology is essential. Use prospectuses, rating reports and stress/recovery analyses to assess the true risk implied by notches, and plan portfolio and covenant responses accordingly.
Further reading and references
– Investopedia: Notching
– Moody’s and S&P public methodology statements and notching guidance (consult the agencies’ websites for the latest, detailed methodology documents).