Moody's Corporation (MCO) : the duopoly stock
2026-06-22 · By Lubin Danilo, founder of Lubin Investment
Moody's Corporation is one of only two companies that control global credit ratings. Almost every bond issued in the world needs their seal of approval. It is a legally anchored duopoly with free cash flow margins near 50% and structural growth of 10 to 15% per year. The valuation is high, but the competitive moat justifies it.
- Global bond-rating duopoly with S&P Global: a near-unassailable position built over 100 years
- Quasi-legal obligation to obtain a Moody's rating to issue bonds on world markets
- Two complementary segments: Moody's Investors Service (ratings) and Moody's Analytics (risk data and software)
- Free cash flow margin structurally near 50%, growth of 10-15% per year
- Maximum quality score in my screener; high valuation justified by the rarity of the moat
Understanding the business: why Moody's is indispensable
When a company or government wants to borrow money by issuing bonds, it needs a credit rating. That rating tells investors: is this borrower reliable? Will they pay back? That is where Moody's comes in. Founded over 100 years ago, the firm is one of only two in the world that financial markets truly trust for this work. The other is S&P Global. Together they control the vast majority of the global credit-rating market. This duopoly was not built by accident: it rests on decades of reputation, credibility, and historical data that no one can replicate overnight.
What makes this business model exceptional is that a rating is often a quasi-legal requirement. Many institutional funds, prudential regulations, and financial contracts require bonds to be rated by a recognised agency. In practice, that means every new bond issuance in the world almost automatically generates revenue for Moody's. The firm is not selling something customers can choose to skip: it is embedded in the very functioning of global financial markets.
Two revenue engines: ratings and analytics
Moody's is not a single business; it is really two distinct activities under one roof. The first, Moody's Investors Service, is pure ratings: it accounts for roughly half of total revenues. The firm rates thousands of issuers worldwide, from sovereign governments to small companies, and earns fees for each rating or update. The second engine, Moody's Analytics, makes up the other half of revenues. This segment sells data, software, and risk-analysis tools to banks, insurers, asset managers, and regulators. These are recurring subscriptions: once a financial institution integrates Moody's tools into its risk-management processes, switching away costs too much in time and retraining. That is what a high switching cost means: the cost of leaving is so high that clients stay.
The moat: what really protects this business?
A moat is a company's competitive advantage: what stops a rival from stealing its clients. For Moody's the moat operates on several levels. First, reputation and credibility built over 100 years. Financial markets trust Moody's because they always have. Building a competing agency that inspires the same level of trust would take decades, if it is even possible. Then there are regulatory barriers: in many countries, only agencies accredited by regulators can provide valid ratings for funds and bank balance sheets. Those accreditations are slow and hard to obtain. Finally, Moody's historical database: decades of defaults, rating migrations, and sector correlations. This data mine is a resource no one can build overnight.
The numbers that tell the quality story
To judge whether a business is high quality, I look at concrete financial criteria, not just the narrative. The first indicator I track is the free cash flow margin. Free cash flow is the money that actually stays in the company's treasury after paying all operating bills and investments. It is harder to manipulate than accounting profit, so it is the figure I prefer. Moody's runs a free cash flow margin structurally near 50%. That means roughly 50 cents of every dollar of revenue turns into real available cash. That is exceptional: most companies struggle to reach 10-15%.
Revenue growth is steady at 10-15% per year over the long term. The company buys back its own shares on a large scale, mechanically increasing the value of each remaining share: a sign that management is comfortable with the cash being generated and confident in the business. The dividend grows every year. Operating margins are among the highest in the entire financial sector. In my quality screener, Moody's earns a score of 10 out of 10: the maximum, awarded to companies that check every one of my financial-strength criteria.
| Criterion | Moody's (MCO) | Sector comparable |
|---|---|---|
| Free cash flow margin | ~50% | 10-20% (sector median) |
| Annual revenue growth | 10-15% | 5-10% |
| Share buybacks | Massive and regular | Variable |
| Dividend | Growing every year | Variable |
| Quality score (screener) | 10/10 | Reference |
| Competitive position | Global duopoly | Fragmented |
Valuation: understanding why it is expensive
To measure what the market is willing to pay for a stock, I use the P/FCF: the price-to-free-cash-flow ratio. It is simply the share price divided by the free cash flow generated per share each year. A P/FCF of 10 means you are paying today for 10 years of that cash. The lower this ratio, the cheaper the stock. Moody's currently carries a valuation of roughly 31 times its free cash flow. That is high. Most stocks trade between 15 and 25 times. At 31 times, the market is clearly saying: this company is exceptional and its revenues will keep growing.
Is this level of valuation justified? That is the real question. My answer is yes, and here is why. A duopoly with a quasi-legal usage requirement, absolute switching costs in analytics, and a 50% free cash flow margin deserves a valuation premium. You pay up because the rarity of the business is real. There are two companies in the world doing what they do, and that is not about to change. But this high valuation leaves little room for error: if growth slows or a risk materialises, the correction can be severe.
Risks that cannot be ignored
An honest analysis does not hide the risks. There are four for Moody's. The first is regulatory: after the 2008 crisis, US laws (notably the Dodd-Frank Act) regulated rating agencies and restricted certain practices. New regulations could affect the business model. The second risk is legal: ratings are sometimes challenged in court when they prove too optimistic. Moody's has already paid significant fines following the subprime crisis. The third risk is cyclical: when companies and governments issue fewer bonds (during rising rates or a recession), rating revenues fall. This is a short-term but real risk. Finally, fintech disruption: new financial data and AI companies are attempting to offer alternatives to traditional ratings. None seriously threatens the duopoly today, but it is a risk to monitor over a ten-year horizon.
How I analyse a stock like this one
When I look at Moody's, I always separate two distinct questions. First q: is this a good business? Second question, entirely independent: is today the right price? A great business bought at too high a price is still a poor investment. And a poor business bought cheaply can be a trap. Mixing the two is the most common mistake I see. For Moody's, the answer to the first question is very clear: it is an elite business, with an exceptional moat, rare margins, and a competitive position built over a century. The answer to the second question depends on your conviction about the durability of that position and the price you are willing to pay for that quality.
It is precisely to answer these two questions quickly, for any stock, that I built my analysis site. You can find Moody's complete quality score, detailed financial data, and my methodology explained at lubin-investment.com/analyse/MCO.
FAQ
Why does Moody's have such a strong competitive advantage?
Because its advantage rests on three pillars nobody can copy quickly: 100 years of reputation and credibility, regulatory accreditations that are hard to obtain, and a unique historical database. Financial markets trust Moody's because they always have. This is not a technological advantage; it is an institutional one.
What is free cash flow and why does it matter?
Free cash flow is the money that actually remains in a company's treasury after paying all operating expenses and necessary investments. It is harder to manipulate than accounting profit. For Moody's, a free cash flow margin near 50% means half of every dollar of revenue becomes available cash: that is exceptional.
Why is Moody's valuation so high?
A high valuation reflects the rarity and quality of the business. Moody's is one of only two companies in the world in its position, with quasi-legal usage requirements in global bond markets. Investors accept paying a premium for assets this rare and defensive. But that premium leaves little room for error if growth disappoints.
What is the main risk for Moody's?
In the short term, cyclical risk: when bond issuance slows (rising rates, recession), rating revenues fall. In the long term, regulatory risk and disruption from data alternatives. These risks exist, but none threatens the duopoly on a five-year horizon in my analysis.
How should I use a 10/10 quality score in my analysis?
The quality score in my screener assesses a company's financial strength on objective criteria: profitability, growth, share buybacks, margins, debt. A 10/10 means the business is elite. But it says nothing about price. An elite business bought at an unreasonable price is still a bad buy. Quality and price are always two separate questions.
Voir l'analyse MCO sur Lubin Investment
About the author
Written by Lubin Danilo, founder of Lubin Investment. A self-taught individual investor, I have analyzed stocks through their fundamentals for several years and invest my own money with this method. I codified it into a tool that judges a company's quality and its price separately, using criteria drawn from the financial literature (Warren Buffett, Michael Mauboussin, Aswath Damodaran).