A credit rating agency publishes a rationale whenever it assigns, affirms, upgrades, downgrades or withdraws a rating. The document has the same skeleton at every agency and in every country, because the skeleton is what the regulators and the users demanded, and once you know it you can read one in five minutes.
What are the parts of a rating rationale?
| Part | What it contains | What to do with it |
|---|---|---|
| Rating and outlook | The symbol, the scale, the instruments covered, the outlook or watch status | Record the instrument, not just the company. Bank facilities and market instruments are often rated separately |
| Rationale summary | Two or three paragraphs stating why | The agency's own compression of its thesis. Compare it against yours |
| Key rating strengths | Positive factors, usually four to six | Each is a claim about durability. Ask which would survive a bad year |
| Key rating weaknesses | Negative factors | Usually the most honest paragraph in the document |
| Rating sensitivities | Explicit upgrade and downgrade triggers, generally with numbers | The whole reason to read the thing. See the next section |
| Liquidity | Sources against uses over the next twelve months, and a verbal grade | Recompute it. It is arithmetic and it is checkable |
| About the company | One paragraph of business description | Skip unless the company is new to you |
| Key financial indicators | A small table of ratios, agency-defined | The agency's definitions, not yours. Read the footnotes |
| Instruments rated | Annexure listing every facility with amounts | The only free, current map of a private company's debt stack |
| Complexity and disclosures | Instrument complexity, prior actions, analyst contacts | The rating history is here, and it is a track record |
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How much weight can a rating rationale carry?
Three properties of the document decide how much weight it can carry.
A rating is an opinion about relative default risk rather than about price. An investment-grade bond can be a terrible investment and a single-B bond a fine one. The rating speaks to probability of default and, at some agencies, expected loss. It says nothing about whether you are paid enough for it.
National-scale and global-scale ratings are different currencies. A domestic Indian rating is a ranking within India, relative to other Indian issuers, and the agencies publish mappings showing that a top domestic rating corresponds to a materially lower rating on the global scale, anchored around the sovereign. Comparing an Indian AAA to a US AAA and concluding they carry the same risk is a category error that has cost real money. When you see a top-of-scale domestic rating, find the agency's own mapping table before you use it in a cost-of-capital calculation. (Sovereign ratings and the published mapping tables both move; check the current letters on the agency's own sovereign page. Checked September 2026.)
The instruments-rated annexure is often the best free debt map in existence, especially for unlisted issuers and for subsidiaries that do not file separately. It lists facilities with amounts and tenors, which is enough to reconstruct a maturity profile that appears nowhere else in the public record.
What should you watch for in Indian ratings?
Two watch-outs from the Indian market are worth carrying. A rating tagged as issuer-not-cooperating means the agency lost access to management information and is rating on public data alone; treat it as an absence of a rating rather than as a rating. And the surveillance obligation is continuous, which is why a downgrade often arrives on a Friday evening with no other news: the trigger was a covenant test or a debt-servicing event the agency saw before the market did.
Turning sensitivities into a trigger list you actually check
The rating sensitivities paragraph is the only part of a rating rationale written as a conditional. It says, in the agency's own words, what would have to be true for the rating to move. That makes it convertible into a monitoring list, and the conversion is mechanical.
Worked example: turning sensitivities into a trigger list
Take a synthetic Indian manufacturer rated in the double-A band. FY26 EBITDA is Rs 918.00 crore, net debt is Rs 1,652.00 crore, interest expense is Rs 148.00 crore, total outside liabilities are Rs 2,410.00 crore and tangible net worth is Rs 2,180.00 crore. Current ratios: net debt to EBITDA of 1.7996 times, interest coverage of 6.2027 times, total outside liabilities to tangible net worth of 1.1055 times.
The rationale names four triggers. Downgrade if net debt to EBITDA is sustained above 2.50 times, or if interest coverage falls below 3.00 times. Upgrade if the liabilities-to-net-worth ratio is sustained below 1.00 times and coverage stays above 6.00 times.
Convert each into a distance and a source.
| # | Trigger | Today | Breach point | Distance | Refreshed by |
|---|---|---|---|---|---|
| 1 | Net debt / EBITDA above 2.50x | 1.7996x | Net debt Rs 2,295.00 cr, or EBITDA Rs 660.80 cr | Rs 643.00 cr of extra net debt, or a 28.0174% EBITDA fall | Quarterly result, balance sheet half-yearly |
| 2 | Interest coverage below 3.00x | 6.2027x | Interest Rs 306.00 cr, or EBITDA Rs 444.00 cr | A 51.6340% EBITDA fall | Quarterly result, finance-cost line |
| 3 | Liabilities / net worth below 1.00x | 1.1055x | Net worth Rs 2,410.00 cr | Rs 230.00 cr of net worth, about 0.5721 years of retained profit at Rs 402.00 cr | Half-yearly balance sheet |
| 4 | Coverage sustained above 6.00x | 6.2027x | Already clear by 0.2027x | Fragile: a 3.27% EBITDA fall loses it | Quarterly result |
| 5 | Liquidity remains adequate | 1.9012x cover | Sources Rs 1,578.00 cr against uses Rs 830.00 cr | Surplus Rs 748.00 cr; 1.3590x excluding undrawn lines | Rating rationale, cash flow, borrowing note |
Two habits make the table worth building. First, always compute the distance two ways, once as the deterioration in the numerator and once as the deterioration in the denominator, because a leverage trigger can be breached by borrowing or by earning less and the two have completely different lead indicators. Second, always name the document that refreshes each row. A trigger you cannot refresh from a document that arrives on a schedule is not a monitorable trigger; it is a worry.
Row 5 is the one most people skip. Liquidity in a rationale is sources against uses over twelve months, and it is pure arithmetic: cash from operations Rs 742.00 crore plus cash and liquid investments Rs 386.00 crore plus undrawn committed lines Rs 450.00 crore, against repayments Rs 310.00 crore plus committed capex Rs 520.00 crore. Cover of 1.9012 times looks comfortable until you strike out the undrawn lines, which a lender may withdraw exactly when you need them, and the cover falls to 1.3590 times. Run it both ways every time.