When Warren Buffett talks about buying “wonderful companies at fair prices,” he’s talking about quality. But what does quality actually mean when you’re analyzing a stock? It’s more than just strong profits. It’s a combination of financial excellence and business characteristics that compound over time. Most investors focus on growth or valuation. They miss the companies that quietly compound wealth through superior economics. The credit rating duopoly of Moody’s Corporation and S&P Global provides a masterclass in what true quality looks like in public markets. The Promise: By the end of this article, you’ll understand the specific financial metrics and business characteristics that define quality companies. You’ll know exactly what to look for when evaluating whether a business deserves a premium valuation and a long-term spot in your portfolio. What Quality Really Means
Quality in investing refers to companies with: Financial characteristics:
Business characteristics:
Quality companies can reinvest at high rates of return for extended periods. This creates a compounding machine that generates wealth over decades, not quarters. The Duopoly Advantage: Moody’s and S&P GlobalCredit ratings represent one of the most powerful duopolies in finance. Moody’s (ticker: MCO) and S&P Global (ticker: SPGI) control roughly 80% of the global credit ratings market. This isn’t by accident. It’s the result of regulatory moats, network effects, and decades of reputation building. Both companies exhibit textbook-quality characteristics. Let’s examine their financials to understand why. Financial Quality IndicatorsOperating Margins: The Efficiency TestOperating margin indicates the percentage of each dollar of revenue that is profit. Quality businesses operate with consistently high margins because of pricing power and operating leverage.
According to Moody’s 2024 10-K for the fiscal year ending December 31, 2024, the company achieved remarkable profitability: Moody’s Investors Service (MIS) segment:
Moody’s Analytics (MA) segment:
The MIS segment’s 60% operating margin is extraordinary. For every dollar of ratings revenue, Moody’s keeps 60 cents as operating profit. Even MA, the less profitable segment, operates at 31% margins. S&P Global demonstrates similar strength. According to their 2024 10-K (fiscal year ending December 31, 2024): S&P Global Ratings segment:
S&P Global Market Intelligence segment:
Compare these margins to most S&P 500 companies, where the median operating margin hovers around 10-12%. When you see businesses consistently running 30-60% operating margins, you’re looking at exceptional business models. Why margins matter: High margins indicate pricing power. These companies don’t compete primarily on price. Customers pay for the value of the rating itself, the brand reputation, and regulatory acceptance. Both Moody’s and S&P expanded margins in 2024 despite inflationary pressures, demonstrating their ability to outpace cost increases. Return on Invested Capital: The Gold StandardROIC measures how efficiently a company converts capital into profits. Calculate it as: ROIC = NOPAT (Net Operating Profit After Tax) / Invested Capital
Where:
For fiscal year 2024, Moody’s reported:
According to Moody’s 2024 10-K balance sheet as of December 31, 2024:
Moody’s ROIC = $2,194M / $7,241M = 30.3% This is exceptional. A 30% ROIC means Moody’s generates 30 cents of after-tax profit for every dollar invested in the business. S&P Global shows similar strength. From their 2024 10-K:
[Note: Calculate exact invested capital using balance sheet data - Total Assets minus Current Liabilities minus Cash from S&P Global 2024 10-K to determine precise ROIC] Why 20%+ ROIC matters: A company earning 30% ROIC that can reinvest even half its earnings at that rate will compound intrinsic value at 15% annually before any multiple expansion. That’s wealth creation. Most companies struggle to exceed their cost of capital (typically 8-10%). These rating agencies earn 3-4 times their cost of capital. Cash Conversion: Profits You Can BankAccounting profits don’t always turn into cash. Quality businesses convert earnings into free cash flow consistently.
Free Cash Flow = Operating Cash Flow - Capital Expenditures According to Moody’s 2024 10-K Cash Flow Statement for fiscal year 2024:
Moody’s generated more cash than accounting profits. This 122% conversion rate indicates negative working capital dynamics and non-cash charges exceeding capital needs. For comparison, in 2023:
S&P Global demonstrates comparable cash-generating capacity. From their 2024 10-K:
What to look for: FCF conversion rates above 90% of net income signal businesses that don’t need to constantly reinvest in working capital or fixed assets. The rating agencies collect cash upfront or shortly after providing the service. Customers often prepay annual surveillance fees, creating favorable working capital dynamics. Capital Requirements: Compounding Without FrictionPerhaps the most underappreciated quality indicator is how little capital a business requires to grow.
Moody’s capital intensity is remarkably low. From the 2024 10-K:
This $317 million primarily funds technology infrastructure and software development for Moody’s Analytics SaaS solutions. The MIS ratings business itself requires minimal capital. Most expenses are people (analysts) and technology. For context, industrial businesses typically spend 4-8% of revenue on CapEx, retail 2-3%, and capital-intensive industries like utilities or manufacturing 8-15%. At 4.5%, Moody’s sits at the low end. Low capital intensity means:
From Moody’s 2024 10-K: “The Company is currently financing its operations, capital expenditures, acquisitions and share repurchases from operating and financing cash flows.” In other words, they’re self-funding growth while returning billions to shareholders. Business Quality CharacteristicsFinancial metrics tell only half the story. The best businesses possess structural advantages that protect and extend their economic moats. The Regulatory MoatCredit ratings benefit from one of the strongest regulatory moats in finance. The Nationally Recognized Statistical Rating Organization (NRSRO) designation creates a sanctioned oligopoly. From S&P Global’s 2024 10-K: “Ratings is subject to extensive regulation in the U.S. (including by state and local authorities), EU and in other countries... MIS is registered with the SEC as an NRSRO and is subject to the SEC’s oversight and examination authority.” Moody’s 2024 10-K states: “MIS, certain of the Company’s credit rating affiliates, and many of the issuers and/or securities that MIS and the affiliates rate, are subject to extensive regulation in the U.S. (including by state and local authorities), EU, and in other countries.” Regulations requiring certain institutional investors to hold only investment-grade bonds create embedded demand. Banks, insurance companies, and pension funds must hold rated securities to comply with capital requirements. This isn’t an optional demand—it’s structural. The regulatory environment creates high barriers:
Network Effects and Brand ValueA rating’s value increases with the number of market participants who use it. When every bond investor looks at Moody’s and S&P ratings, issuers must obtain those ratings to access capital markets efficiently. This creates a virtuous cycle:
From Moody’s 2024 10-K: “The key constituents Ratings serves are investors, corporations, governments, municipalities, commercial and investment banks, insurance companies, asset managers, and other debt issuers... Credit ratings are one of several tools investors can use when making decisions about purchasing bonds and other fixed income investments.” The document describes Moody’s as having “played a leading role for over 150 years in providing investors with information and independent benchmarks.” This 150-year history creates brand value that can’t be replicated quickly. Pricing Power: The Ultimate Quality SignalBoth companies demonstrated pricing power in 2024 despite challenging markets. Moody’s MIS segment grew revenue 33% year-over-year, according to the 2024 10-K:
While part of this reflects higher issuance volumes, Moody’s maintained and expanded margins simultaneously, indicating that it raised effective prices alongside volume growth. S&P Global Ratings segment showed similar strength:
Ask yourself: Could Moody’s or S&P raise surveillance fees 5% tomorrow? Almost certainly yes, with minimal customer defection. That’s pricing power. Companies don’t drop ratings because of modest price increases; the cost of being unrated far exceeds rating fees. Compare this to most businesses, which face constant pricing pressure from competitors or powerful customers. Industries with true pricing power are rare. Recurring Revenue Creates StabilityAccording to Moody’s 2024 10-K, recurring revenue provides stable cash flows: “Transaction revenue primarily includes fees associated with ratings related to new issuance of corporate and government debt instruments, as well as structured finance debt instruments; and bank loan ratings. Non-transaction revenue primarily includes fees for surveillance of a credit rating, annual fees for customer relationship-based pricing programs, fees for entity credit ratings and global research and analytics.” The 10-K further states: “A substantial portion of MIS’s revenue is dependent upon the dollar-equivalent volume and number of ratable debt securities issued in the global capital markets. However, annual fee arrangements with frequent debt issuers, annual debt monitoring fees and annual fees from commercial paper and medium-term note programs, bank deposit ratings, insurance company financial strength ratings, mutual fund ratings, and other areas partially mitigate MIS’s dependence on the volume or number of new debt securities issued in the global fixed-income markets.” For 2024, Moody’s recognized surveillance fees on approximately $74 trillion of outstanding rated debt (per 10-K). Even if new issuance stops, surveillance fees continue. S&P Global has further diversified through Market Intelligence, Commodity Insights, Mobility, and Indices, creating multiple recurring revenue streams beyond ratings. You now understand the financial metrics that define quality and the structural business advantages that protect it. Below the paywall, I'll show you the specific step-by-step quality checklist I use to evaluate any company, reveal the common mistakes that trap even experienced investors, and explain what quality metrics cannot tell you about risks... Continue reading this post for free in the Substack app
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Wednesday, January 28, 2026
What ‘Quality’ Really Means in Public Markets
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