How S&P and Moody's actually assign ratings — the key financial metrics, qualitative overlays, and why the same company can get different ratings from each agency.
Credit ratings are opinions about the probability that a borrower will fail to meet its financial obligations on time and in full. They are not buy or sell recommendations, and they are not precise probability estimates — they are ordinal rankings of relative creditworthiness. Despite these limitations, ratings drive enormous amounts of capital allocation: investment mandates, regulatory capital treatment, covenant triggers, and index inclusion are all keyed to rating levels.
| S&P | Moody's | Category | Typical Spread (bps over UST) | 5-Year Default Rate (Historical Avg.) |
|---|---|---|---|---|
| AAA | Aaa | Investment Grade | 25–50 | <0.1% |
| AA | Aa | Investment Grade | 50–100 | 0.1–0.3% |
| A | A | Investment Grade | 80–150 | 0.3–0.5% |
| BBB | Baa | Investment Grade (Lowest) | 125–250 | 1.0–2.5% |
| BB | Ba | Speculative / High Yield | 250–400 | 5–8% |
| B | B | Speculative / High Yield | 400–650 | 12–18% |
| CCC | Caa | Highly Speculative | 650–1,200 | 30–45% |
| CC | Ca | Near Default | 1,200+ | 55–70% |
| D | C | Default | N/M | 100% |
Within each letter grade, modifiers provide granularity: S&P uses +/− (so BB+ is better than BB, and BB− is worse than BB); Moody's uses 1/2/3 (so Ba1 is best within Ba, Ba3 is worst). The investment grade / speculative grade divide at BBB−/Ba1 is a hard boundary for many institutional investors and regulatory capital regimes. A "fallen angel" — a company downgraded from BBB− to BB+ — must be sold by investment-grade-only mandates, creating forced selling and spread widening that can be severe.
S&P uses a two-factor framework that combines a qualitative Business Risk Profile with a quantitative Financial Risk Profile to produce an "anchor" rating, which is then adjusted by modifiers. The methodology is published and publicly available, which allows sophisticated issuers and their advisors to manage toward specific rating outcomes.
The Business Risk Profile (BRP) is S&P's assessment of the structural quality of the business — its industry positioning, competitive advantages, and through-the-cycle profitability. This factor is qualitative and analyst-driven, which is where the most variation occurs across agency analysts and over time. The BRP accounts for roughly 60% of the rating outcome.
| BRP Score | Description | Industry Characteristics | Competitive Position |
|---|---|---|---|
| 1 — Excellent | Dominant market position, high barriers, pricing power | Low cyclicality, regulated or monopolistic | Global leader; #1 or #2 market share |
| 2 — Strong | Solid competitive position, meaningful barriers | Moderate cyclicality, oligopolistic | Strong regional or product-specific leader |
| 3 — Satisfactory | Average industry position, some competitive differentiation | Average cyclicality, moderately competitive | Mid-market participant with defensible niche |
| 4 — Fair | Weak competitive position, limited differentiation | Above-average cyclicality, price-competitive | Commodity participant, low switching costs |
| 5 — Weak | Structurally disadvantaged, customer concentration | Highly cyclical, structurally declining | Sub-scale, dependent on one or two customers |
| 6 — Vulnerable | Near-term viability in question, no competitive moat | Declining industry, disruption risk | No clear competitive advantage |
The Financial Risk Profile (FRP) is driven primarily by leverage ratios (Debt/EBITDA and variants), coverage ratios (FFO/Debt, EBITDA/Interest), and cash flow metrics. S&P primarily uses a "core ratios" approach anchored on Debt/EBITDA and FFO/Debt, with cash flow adequacy providing secondary support.
| FRP Score | Description | Debt / EBITDA | FFO / Debt | Typical S&P Rating Anchor |
|---|---|---|---|---|
| 1 — Minimal | Negligible financial leverage; cash-generative | <1.5x | >60% | AAA–AA |
| 2 — Modest | Low leverage, strong coverage | 1.5–2.0x | 45–60% | A |
| 3 — Intermediate | Moderate leverage, adequate coverage | 2.0–3.0x | 30–45% | BBB |
| 4 — Significant | Above-average leverage; coverage manageable | 3.0–4.0x | 20–30% | BB+/BB |
| 5 — Aggressive | High leverage; limited cushion | 4.0–5.0x | 12–20% | BB−/B+ |
| 6 — Highly Leveraged | Very high leverage; coverage thin | >5.0x | <12% | B/B− |
| 7 — Default | Missed payment, restructuring, bankruptcy | N/M | N/M | D |
Once both factors are scored, S&P looks up the combination in a matrix to derive the anchor rating. The matrix reflects the asymmetry between business and financial risk — a company with excellent business risk (BRP 1) can sustain higher leverage than one with weak business risk (BRP 5) for the same rating outcome.
| Business Risk \ Financial Risk | Minimal (1) | Modest (2) | Intermediate (3) | Significant (4) | Aggressive (5) | Highly Leveraged (6) |
|---|---|---|---|---|---|---|
| Excellent (1) | AAA | AA+ | A+ | A− | BBB | BB+ |
| Strong (2) | AA | A+ | A− | BBB | BB+ | BB |
| Satisfactory (3) | A− | BBB+ | BBB− | BB+ | BB | B+ |
| Fair (4) | BBB | BB+ | BB | BB− | B+ | B |
| Weak (5) | BB+ | BB | B+ | B+ | B | B− |
| Vulnerable (6) | BB | B+ | B | B− | CCC+ | CCC |
Once the anchor is determined from the matrix, S&P applies up to six modifiers that can each move the anchor rating by one notch up or down:
Moody's and S&P cover broadly the same universe of issuers and arrive at broadly similar ratings (correlation between the two agencies on the same issuer is high — around 0.95). But they differ in methodology in ways that matter for specific companies.
Where S&P applies a relatively uniform BRP/FRP framework across industries, Moody's publishes industry-specific rating methodologies with explicitly stated factor weights. A technology company might weight recurring revenue (30%), R&D intensity (15%), and competitive position (20%) differently than a consumer products company. This means two companies at the same leverage level but in different industries may be scored differently under Moody's framework than under S&P's.
Moody's assigns a separate Speculative Grade Liquidity Score (SGL 1–4) to all speculative grade issuers, published simultaneously with the issuer rating. The SGL measures near-term liquidity: cash on hand, revolver availability, near-term maturity profile, and covenant headroom. SGL-1 (Strong) means the company can cover all obligations for the next 12 months without external financing. SGL-4 (Weak) means the company may need external financing within 12 months and may not be able to obtain it. A rating downgrade and an SGL worsening in the same announcement is a serious signal.
Moody's places more emphasis than S&P on operating cash flow metrics — specifically CFO/Debt and FCF/Debt — rather than pure EBITDA-based leverage. A company with $100M EBITDA and $500M debt at 5.0x leverage, but with very high working capital intensity and large maintenance capex, might have only $30M of CFO, implying CFO/Debt of just 6%. Under Moody's framework, that cash generation shortfall is penalized more heavily. Under S&P's framework, the leverage ratio dominates and the 5.0x EBITDA/Debt ratio sets the initial FRP score regardless of cash conversion.
Rating splits — where one agency rates a company one or more notches higher than another — are common and have three primary causes:
Both agencies use "adjusted" EBITDA, but they disagree on what counts. Moody's has historically been more conservative about synergy add-backs in LBO situations. If the company claims $15M of run-rate synergies and S&P accepts $10M while Moody's accepts $5M, the effective leverage under each agency's analysis differs — even on the same deal with the same reported numbers.
A company that is the dominant player in a niche market might be scored as BRP 2 (Strong) by S&P's analyst, who emphasizes market position, while Moody's analyst scores it as the equivalent of BRP 3 (Satisfactory) because the niche is small and cyclically exposed. One notch difference in business risk can translate directly to a one-notch rating difference in the final outcome.
Beyond the rating letter and modifier, both agencies assign an outlook (Positive / Stable / Negative) and a watch status (CreditWatch Positive/Negative/Developing for S&P; Review for Upgrade/Downgrade/Direction Uncertain for Moody's). The outlook communicates the expected rating direction over a 6–24 month horizon. A company rated B/Stable and B/Negative Watch by the two agencies, respectively, is trading at a split: the market will price closer to the more negative view. Watch Negative status typically resolves in a downgrade 60–90% of the time within 90 days of being placed on watch.
Company: Industrial components manufacturer. Niche market leader (top 3 position, 18% share in a $700M addressable market). Revenue: $250M. LTM Adjusted EBITDA: $125M. Total Debt: $500M. EBITDA Margin: 50% (asset-light, software-enabled). Capex: $12M. Cash Interest: $28M. CFO: $82M. No near-term maturities.
Step 1: Business Risk Profile
Step 2: Financial Risk Profile
| Metric | Actual | FRP Implication |
|---|---|---|
| Debt / EBITDA | 4.0x ($500M / $125M) | Significant (FRP 4) |
| EBITDA / Interest | 4.46x ($125M / $28M) | Strong for FRP 4; supports upper end |
| CFO / Debt | 16.4% ($82M / $500M) | Aggressive (FRP 5 under Moody's focus) |
| FCF / Debt (after capex) | 14.0% ($70M / $500M) | Upper end of Aggressive range |
Debt/EBITDA of 4.0x places the company at the boundary between Significant (FRP 4) and Aggressive (FRP 5). S&P, which weights EBITDA-based leverage heavily, scores FRP 4 (Significant). Moody's, which weighs CFO/Debt more heavily, may score FRP 5 (Aggressive) given 16.4% CFO/Debt falls in the Aggressive range.
Step 3: Anchor Rating from Matrix
Step 4: Modifiers
Step 5: Final Rating
Conclusion: S&P and Moody's are likely to land at BB / Ba2 (equivalent), with a possible one-notch split to BB− / Ba3 from Moody's given its heavier weighting of cash flow metrics. The key debate is the CFO/Debt metric — if the company's cash conversion improves through working capital release, Moody's would likely converge to Ba2.
Middle market companies that borrow from direct lenders (BDCs, credit funds, family office lenders) are typically not rated by S&P or Moody's — the cost ($50–200K annually plus management time) is not justified for a private company. Instead, direct lenders perform their own "shadow rating" analysis, applying the agency methodologies internally to calibrate where the credit would sit if it were publicly rated.
Shadow ratings serve two purposes: (1) they provide a standardized risk framework for portfolio monitoring and comparison across deals; (2) BDCs are required to disclose a "fair value" of their loan portfolio, and shadow ratings feed directly into the fair value methodology. A loan marked as "B equivalent" by the shadow rating process will be written down if the company deteriorates toward "B− equivalent" — triggering a NAV impact for the BDC's investors.
The shadow rating process at a direct lender typically mirrors S&P's methodology but with more emphasis on downside scenario analysis (because direct lenders have no exit — they hold to maturity or restructure) and more attention to cash flow quality (because the private company's reported "Adjusted EBITDA" is even more negotiated than a public company's).
Ratings are trailing indicators. S&P and Moody's rate on the basis of public information — audited financials, management guidance, industry reports. Direct lenders have board observer seats, quarterly management calls, and real-time covenant compliance certificates. By the time an agency downgrades a company from B to B−, a well-run direct lender has known about the deterioration for two quarters and has already had the amendment discussion. The practical view from direct lending desks is this: agency ratings tell you what happened. Your covenant package tells you what is happening. The two are not interchangeable. Use the agency methodology as a calibration tool and a shared vocabulary across the industry — but do not use a BB− agency rating as a substitute for your own credit analysis. The companies in the most trouble are the ones where everyone relied on the agency rating and nobody modeled the downside.
Start with the two-factor framework. The Financial Risk Profile (FRP) is determined primarily by leverage: 4.5x Debt/EBITDA falls at the boundary between Significant (FRP 4, threshold 3.0–4.0x) and Aggressive (FRP 5, threshold 4.0–5.0x) — I would say FRP 5 Aggressive given we are above 4.0x. For Business Risk Profile, I would assess the company's industry risk (industrial — moderate cyclicality, probably BRP 3 Satisfactory or BRP 4 Fair depending on competitive position) and its profitability profile. With BRP 3 and FRP 5, the matrix anchor is approximately BB. Then apply modifiers: if it is sponsor-owned, financial policy probably pushes down one notch to BB−. If liquidity is strong and there is a clear deleveraging path, maybe you hold at BB. The final rating is BB to BB−, which is where most sponsor-backed industrials at 4.5x actually trade in the market.
CreditWatch Negative means S&P believes there is at least a 50% probability of a downgrade, typically within 90 days. It is usually triggered by a specific event: a large leveraged acquisition announcement, a missed earnings that causes a covenant breach, a regulatory adverse ruling, or the announcement of a leveraged dividend recap. It differs from a Negative Outlook, which signals a one-in-three probability of a downgrade over a 12–24 month horizon — a slower-moving deterioration rather than an acute event. When you see CreditWatch Negative on a leveraged borrower, the market prices in the downgrade immediately; the spread widens to where it would trade at the lower rating level before the agency acts. If the deal ultimately does not happen or the company cures the problem, you sometimes get a spread tightening when the CreditWatch is resolved without a downgrade.
Three main reasons. First, EBITDA add-backs: Moody's tends to be more conservative about accepting run-rate cost savings and synergies, so their adjusted leverage figure is often higher than S&P's for the same company, pushing the FRP score down. Second, cash flow weighting: Moody's places greater emphasis on CFO/Debt and FCF/Debt than S&P, which is more anchored on EBITDA leverage. A company with high EBITDA but poor cash conversion (high capex intensity, working capital consumption) will score worse under Moody's methodology. Third, business risk assessment: the two agencies sometimes differ on how they evaluate niche market positions — S&P may credit a market leadership position in a small market more generously than Moody's, which weights absolute size and diversification more heavily. The resulting split is most common in LBO situations where the sponsor has negotiated aggressive EBITDA definitions and the business has high gross margins but meaningful reinvestment requirements.