No Single Number Tells the Story
How to combine everything in Part 3 into one picture of a company, using STU Corp: a scorecard of the numbers, a benchmark, and the questions the numbers can't answer.
The short version
Each ratio answers one question. Understanding a company means putting the answers together: how it makes money, whether it's profitable, strong, and growing, whether its earnings turn into cash, and what could go wrong. Benchmarks against similar companies add context. Some of the most important facts, like a customer that could leave or a patent about to expire, never show up in a ratio. They come from reading the business description, management's discussion, and the risk factors. A good business is also not automatically a good investment: that depends on the price.
By the end of this lesson, you'll be able to
- Combine profitability, strength, growth, cash, and risk into one assessment of a company
- Use a benchmark for context
- Name what financial ratios can't show, and where to look for it
Why this matters
Part 3 has given you a toolkit: margins, returns, liquidity, debt, growth, and cash. Used one at a time, each can mislead, as STU Corp's slipping return on equity showed in Is It Profitable? The SEC's guide to financial statements puts it simply: no one statement tells the complete story, but together they're very powerful.1 The same goes for ratios. This lesson puts everything together.
STU Corp's scorecard
| Question | What the numbers say | What to keep watching |
|---|---|---|
| How does it make money? | Systems sold at thin margins; cartridges bring in 60% of revenue and 80% of gross profit | Cartridge sales once the connector patent expires |
| Is it profitable? | Gross margin 50%, operating margin 20%, ROIC about 30%, all rising | Whether margins hold if compatible cartridges force price cuts |
| Is it financially strong? | Current ratio 2.8, debt 0.47 times equity, interest covered 13 times | How much debt comes due, and when |
| Is it growing? | Revenue up 14%, earnings per share up 29.5%, gaining market share, mostly from volume | The share count, and the size of the market |
| Do earnings become cash? | Operating cash flow 1.45 times net income; receivables and inventory in line with sales | Stock-based pay, and equipment spending running above depreciation |
| What could go wrong? | One customer buys 30% of its products; one factory; one main supplier; the patent expires in three years | Losing the biggest customer could cut operating income by about two-thirds |
Add a benchmark
Numbers mean more next to similar companies. STU Corp makes household products, and NYU Stern professor Aswath Damodaran's January 2026 data shows US household products companies averaging a gross margin of about 51% and a net margin of about 11.7%.2 STU Corp's 50% gross margin is about average for the group, and its 14.5% net margin is above it. That's a rough comparison, since the group mixes many kinds of products, but it says STU Corp's profitability isn't unusual for its industry. The best comparison is with direct competitors, which Researching Management and Competitors in Part 4 covers.
The rest of this lesson is for members
Still to come in this lesson: What the numbers can't show, Putting it together, the key takeaways, and 2 quiz questions with explanations.
Membership opens every lesson in the curriculum, the capstone projects, the interactive tools, and the members-only channels in the Hyperion Entities Discord. The first lesson of every module stays free.
Go deeper
- Quality of EarningsFinancial Statement Analysis in Depth (depth track)
- Building an Investment ThesisPart 4: Research and Valuation
- Reading a Real 10-K, Section by Section coming soonResearch Workshop (depth track)
Notes and sources
- U.S. Securities and Exchange Commission. Beginners' Guide to Financial Statements. Checked 2026-09-30. Back to text
- Aswath Damodaran, NYU Stern School of Business. Margins by Sector (US), data as of January 2026. Checked 2026-09-30. Back to text
- Legal Information Institute, Cornell Law School. 17 CFR 229.303 (Item 303 of Regulation S-K): Management's discussion and analysis of financial condition and results of operations. Checked 2026-09-30.