A rating is a professional assessment of the credit risk or investment merit of a security (typically a bond) or, in the case of equity research, a recommendation on a stock. Ratings tell investors how likely an issuer is to meet its financial obligations (credit ratings) or how an analyst expects a stock to perform relative to a chosen time horizon (analyst recommendations).
Key takeaways
– Credit ratings measure creditworthiness—i.e., the probability an issuer will pay interest and repay principal. Major agencies: S&P Global Ratings, Moody’s Investors Service, and Fitch Ratings. (Investopedia)
– Analyst ratings (buy/hold/sell or variations such as overweight/neutral/underweight) express an analyst’s view and time horizon, not a legal judgment about repayment. (Investopedia; Morgan Stanley; Credit Suisse)
– “Investment-grade” bonds are lower-risk credits (S&P BBB- / Moody’s Baa3 or higher); “speculative” (often called “high-yield” or “junk”) are below those thresholds. (Investopedia; Moody’s; S&P)
– Credit downgrades typically raise a borrower’s funding costs and can trigger investor selling, covenant consequences, or rating-dependent regulatory impacts. (Investopedia; Fitch example)
How a credit rating works
– Information gathering: agencies analyze financial statements, cash flows, leverage and coverage ratios, liquidity, business and industry risk, corporate governance, legal/contractual terms, and macro factors.
– Assessment and judgement: the agency judges probability of default, expected recovery, and stability of credit profile. Ratings reflect relative likelihood of timely repayment and, often, how senior or subordinated a claim is.
– Publication and monitoring: agencies publish an initial rating and report, then monitor and update as new information or events occur (periodic surveillance or event-driven reviews).
– Scale and gradations: agencies use letter/number scales (e.g., Moody’s Aaa → C; S&P/Fitch AAA → D) with modifiers (A1/A2/A3; AA+, AA, AA−) to show fine gradations of quality.
Types of ratings
– Long-term vs short-term credit ratings
– Issuer vs issue ratings (rating the borrower overall vs specific bond/security)
– Sovereign, municipal, corporate, structured-finance (CMBS, ABS), and insurance financial-strength ratings
– Senior secured, senior unsecured, subordinated, and hybrid instrument ratings (reflecting priority of payment)
Analyst ratings (equity research)
– Purpose: provide investment recommendations and expected performance over a stated time horizon (commonly 12–18 months for many sell-side banks).
– Typical labels: Buy / Hold / Sell. Variations used by major firms: e.g., Morgan Stanley uses Overweight / Equal-weight / Underweight (12–18 month horizon); Credit Suisse used Outperform / Neutral / Underperform (12 months). (Investopedia; Morgan Stanley; Credit Suisse)
– What they mean: recommendations combine expected total return, valuation, and risk relative to a benchmark or coverage universe—not a guarantee.
Investment-grade vs speculative (credit ratings)
– Investment-grade: S&P/Fitch BBB− and above; Moody’s Baa3 and above. These indicate relatively low credit risk and a strong likelihood of timely repayment. (Investopedia; Moody’s; S&P)
– Speculative (high-yield/junk): below those thresholds (S&P BB+ and lower; Moody’s Ba1 and lower). These carry higher default risk and therefore typically command higher yields.
What happens when a credit rating drops
– Higher borrowing costs: markets demand higher yields to compensate for increased perceived risk.
– Market price impact: bonds may trade down in price; equity holders may see share-price declines due to weaker perceived fundamentals.
– Covenant and counterparty effects: downgrades can trigger cross-defaults, higher margin/collateral requirements, or termination rights in contracts and derivatives.
– Regulatory and investor constraints: some institutional investors and funds are restricted to investment-grade securities and must sell downgraded bonds—this can intensify price moves.
– Reputational and strategic effects: downgrades can affect supplier/customer confidence and a company’s strategic flexibility.
Example: In August 2023 Fitch downgraded the U.S. long-term rating from AAA to AA+ citing governance concerns around the debt ceiling; the other major agencies did not change their ratings at that time. (Fitch)
Limitations and cautions
– Ratings are opinions, not guarantees. They are backward- and contemporaneous-data-driven and may lag sudden developments.
– Agencies have conflicts of interest (issuer-paid model), and rating methodology and judgements vary among agencies.
– Ratings focus on default risk and recovery, not total return or day-to-day market risk.
Practical steps — for investors
1. Understand what the rating measures
• Know whether it’s a credit rating (default/recovery risk) or an analyst recommendation (expected return).
2. Use ratings as one input, not the sole decision factor
• Combine ratings with credit analysis, covenant review, yield vs duration, macro outlook, and liquidity considerations.
3. Check the time horizon and definitions
• For analyst recommendations, confirm the firm’s time horizon and benchmark; for credit ratings, confirm whether you’re looking at short- or long-term ratings and any outlook/watch status.
4. Monitor rating actions and underlying causes
• If a downgrade or negative outlook appears, read the agency rationale—assess whether the change is temporary or structural.
5. Prepare a response plan
• For bond holdings: decide whether to hold to maturity (if you believe repayment will occur), sell to limit losses, or hedge interest-rate/credit risk.
• For portfolios with constraints (e.g., investment-grade mandates), build buffers and diversify to reduce forced-selling risk.
6. Use diversification and laddering
• Diversify across issuers, sectors, and credit qualities; ladder bond maturities to reduce reinvestment and credit-timing risks.
7. Seek professional advice for complex situations
• For large exposures, illiquid holdings, or regulatory constraints, consult a financial adviser or credit specialist.
Practical steps — for issuers trying to improve/maintain ratings
1. Prioritize liquidity and conservative short-term funding
2. Reduce leverage and adverse maturities (extend maturities, smooth refinancings)
3. Improve cash generation and coverage ratios (EBITDA/interest, FCF)
4. Strengthen governance and transparency—provide timely, comprehensive disclosures to markets and rating agencies
5. Engage proactively with rating agencies—present realistic forecasts and stress scenarios
6. Maintain contingency plans (back-up credit facilities, asset sales)
Practical steps — for analysts and advisers
1. Make assumptions and time horizons explicit
2. Disclose conflicts of interest and the basis of recommendations
3. Complement ratings with scenario analysis and stress-testing
4. Revisit recommendations quickly after material events
How to read ratings scales (examples)
– S&P / Fitch (long-term, best → worst): AAA, AA+, AA, AA−, A+, A, A−, BBB+, BBB, BBB−, BB+, BB, BB−, etc. Investment-grade cutoff: BBB−.
– Moody’s (long-term, best → worst): Aaa, Aa1, Aa2, Aa3, A1, A2, A3, Baa1, Baa2, Baa3, Ba1, Ba2, Ba3, etc. Investment-grade cutoff: Baa3.
(See agencies’ published rating definitions for full scale and wording.)
The bottom line
Ratings are useful, standardized opinions about credit risk or investment opportunity, but they are only one tool. Investors should combine ratings with independent analysis, understand the differences between analyst recommendations and credit ratings, and prepare practical plans for reacting to rating actions. Issuers can influence their ratings through prudent financial management, transparency, and engagement with rating agencies.
Sources and further reading
– Investopedia. “Rating.”
– S&P Global Ratings. “S&P Global Ratings Definitions.” (S&P website)
– Moody’s Investors Service. “Rating Scale and Definition.” (Moody’s website)
– Fitch Ratings. “Fitch Downgrades the United States’ Long-Term Ratings to ‘AA+’ from ‘AAA’; Outlook Stable.” (Fitch press release)
– Morgan Stanley and Credit Suisse research policy/disclosure pages (for firm-specific recommendation frameworks)
Editor’s note: The following topics are reserved for upcoming updates and will be expanded with detailed examples and datasets.