An analyst is reviewing two competitors in the same industry. Company A reports a 22% net margin; Company B reports 11%. The CFO wants to know which company is "better." The honest answer is that you cannot tell from one ratio. Margin without turnover, leverage, or trend is a single data point, and the exam will reward the candidate who reaches for the full ratio set, the common-size view, and the peer comparison before naming a winner.
AICPA Representative Tasks (verbatim). "Compare current period financial statement accounts to prior periods or budget and explain variances." "Interpret financial statement fluctuations and ratios (e.g., profitability, liquidity, solvency, performance)." "Use outputs (e.g., reports, visualizations) from data analytic techniques to identify patterns, trends and correlations to explain an entity's results." "Derive the impact of transactions on the financial statements and notes to the financial statements."
Profitability Ratios
HIGH-FREQUENCY: Profitability tells you whether the business model works. Memorize the five core ratios and what each isolates.
Common mistakes
- Citing a single ratio without a benchmark. A 4.5% net margin is not "low" or "high" until you specify the industry, the prior year, or the budget. The exam will offer trap answers that name a ratio result without context. The right answer always references a comparison.
- Confusing horizontal with vertical analysis. Horizontal looks at the same line across periods (revenue 2025 vs revenue 2026). Vertical looks at all lines as a percent of a base in one period (revenue, COGS, gross profit, all expressed as a percent of revenue).
- Treating an ROE increase as automatic improvement. ROE can rise because net margin rose, because asset turnover rose, because the firm levered up, or any mix. DuPont separates the three. Without the decomposition, you cannot tell whether the business got better or just borrowed more.
Bottom line
- Profitability measures income relative to sales, assets, or capital (gross/operating/net margin, ROA, ROE, ROIC); ROIC strips out capital-structure differences for cross-firm comparison
- Liquidity measures ability to meet short-term obligations and tightens current to quick to cash, each removing less liquid assets (plus working capital)
- Efficiency measures how fast assets cycle into cash (AR/inventory/AP turnover, DSO/DIO/DPO, asset turnover); cash conversion cycle is DIO + DSO minus DPO
- Solvency measures long-term debt-paying ability; covenant testing favors coverage (interest coverage, DSCR) over pure leverage ratios like debt-to-equity or debt-to-assets
Exam shortcut
When a question asks why ROE changed and gives you the data to compute it, always run DuPont. The three terms (margin, turnover, multiplier) point directly at the answer; mark whichever changed materially. When a question describes "short-term ability to pay" or "is the firm liquid," map the cue to the ladder: inventory included → current ratio, inventory excluded → quick ratio, only cash and securities → cash ratio.
The full lesson (about 4,343 words, 29 min read) adds 9 worked examples, all 5 common mistakes, a self-check, free in the app.
Learning objectives
- I.A1
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