Analyzing Key Financial Ratios and Valuation Metrics

Welcome back. In the previous two lessons, you learned to extract profit, cash-flow, liquidity, debt, and equity information from company reports. We now turn those raw figures into ratios that connect business performance with the price investors are currently paying.

The goal is not to find one magic number that says “buy” or “sell.” It is to make a disciplined comparison: Is earnings per share growing? Does the company generate a strong return on the equity shareholders have committed? Does its current valuation appear demanding or modest relative to its own history and genuinely comparable firms?

By the end of this lesson, you will be able to calculate earnings growth, return on equity, P/E, price-to-sales, and free-cash-flow yield—and, more importantly, recognize when a comparison is misleading.

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Start with comparable inputs, not ratios

Ratios look precise because they usually have one or two decimal places. Their usefulness, however, depends on whether the inputs are comparable.

For each company, record:

• the fiscal period used, such as full-year 2024 or trailing twelve months;
• the reporting currency and unit scale;
• whether earnings are net income or net income attributable to common shareholders;
• whether EPS is basic or diluted;
• the date of the share price and market capitalization;
• the free-cash-flow definition.

For a UK-listed company, there is one easy unit trap: a share price may be quoted in pence, while annual-report EPS may be shown in pounds. A P/E calculation only works when both are in the same unit. For example, use $250$ pence with $20$ pence EPS, or $\pounds 2.50$ with $\pounds 0.20$ EPS—not a mixture.

Likewise, a market capitalization in GBP should initially be compared with revenue and free cash flow in GBP. Currency conversion is not required when numerator and denominator use the same currency.

Two comparison axes

Every metric should be viewed against both:

1. The company’s own history
   Has revenue, EPS, cash conversion, and valuation improved, deteriorated, or merely fluctuated through a cycle?

2. An appropriate peer group
   Compare similar business models, maturity, industry, and economic exposure. A mature UK supermarket, a fast-growing US software company, and a commodity producer may all be good businesses, but their normal margins, growth rates, leverage, and valuation ranges differ substantially.

A low P/E relative to a software company does not make a bank cheap. A high P/S relative to an oil producer does not make a cloud business expensive. First establish the business context; then use ratios to test the story.

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Earnings growth: focus on the shareholder’s slice

“Earnings growth” can mean growth in total net income or in earnings per share. Both are informative, but EPS growth is usually more relevant to a shareholder, because it accounts for changes in the number of shares competing for the company’s profits.

The year-on-year growth formula is:

$$\text{Growth rate}=\left(\frac{\text{Current value}}{\text{Prior value}}-1\right)\times 100$$

Suppose a company reports:

Measure	2023	2024
Net income attributable to common shareholders	USD 100 million	USD 120 million
Diluted EPS	USD 2.00	USD 2.18

Net-income growth is:

$$\left(\frac{120}{100}-1\right)\times 100=20\%$$

Diluted EPS growth is:

$$\left(\frac{2.18}{2.00}-1\right)\times 100=9\%$$

Profit rose $20\%$, but EPS rose only $9\%$. The likely explanation is a higher weighted average share count, perhaps from employee share compensation, an acquisition financed with shares, or a capital raise. This difference is why looking only at headline net income can overstate the improvement experienced by each shareholder.

Which earnings figure should you use?

For a basic, repeatable process:

• Prefer diluted EPS over basic EPS.
• Use the same basis across years: reported EPS, continuing-operations EPS, or adjusted EPS.
• Treat management’s “adjusted” earnings carefully. They can be useful, but the exclusions need scrutiny and must be applied consistently.
• Use annual figures for a clean first analysis, then use trailing twelve months for an update if needed.

A percentage growth rate becomes unreliable when the starting earnings figure is very small, zero, or negative. Moving from a loss of USD 0.20 per share to profit of USD 0.10 per share is an important turnaround, but it is not sensibly described as a conventional percentage growth rate. Describe the change in absolute terms and investigate its cause.

For a longer period with positive beginning and ending EPS, calculate compound annual growth rate:

$$\text{EPS CAGR}={\left(\frac{\text{Ending EPS}}{\text{Beginning EPS}}\right)}^{\frac{1}{n}}-1$$

Here, $n$ is the number of years between the two observations. CAGR is useful because it reduces the temptation to overreact to one unusually strong or weak year.

Quality of earnings growth

Growth is more credible when it is supported by:

• revenue growth rather than only cost cutting;
• stable or improving operating margins;
• operating cash flow and free cash flow that broadly follow profit over time;
• stable or declining share count;
• a clear business explanation, such as higher volume, price increases, market-share gains, or a new product.

Be skeptical when EPS growth mainly comes from a one-off tax benefit, asset sale, accounting adjustment, aggressive buybacks funded by debt, or a depressed comparison year.

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Return on equity: profit relative to shareholder capital

Return on equity, or ROE, asks how effectively the company generated profit from the book equity supporting the business.

$$\text{ROE}=\frac{\text{Net income attributable to common shareholders}}{\text{Average common shareholders’ equity}}\times 100$$

Using average equity is preferable to using only year-end equity, because income is earned throughout the year:

$$\text{Average equity}=\frac{\text{Beginning equity}+\text{Ending equity}}{2}$$

Continue the example. Suppose beginning common equity was USD 700 million and ending common equity was USD 740 million:

$$\text{Average equity}=\frac{700+740}{2}=720\text{ million}$$ $$\text{ROE}=\frac{120}{720}\times 100=16.7\%$$

The company earned about $16.7\%$ on the average book equity attributed to common shareholders during the year.

A high ROE is a question, not a verdict

Higher ROE can indicate an attractive, efficient business. But it can also be artificially elevated by a small equity base or high leverage.

A company can show high ROE because it has:

• strong margins;
• efficient use of assets;
• substantial debt relative to equity;
• a large share-repurchase program that reduced equity;
• unusually low or negative equity after past losses or write-downs.

The last three cases are especially important given the balance-sheet work from the prior lesson. A company that has borrowed heavily and bought back shares may report an impressive ROE even though its financial risk has increased.

Use ROE cautiously when equity is very low or negative. Dividing by a tiny denominator can create a dramatic percentage that does not describe a strong business. Compare ROE primarily with companies that have similar capital intensity and financing models. Banks and insurers, for example, require a separate analysis because debt-like funding and regulatory capital are integral to their operations.

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Valuation multiples: what is the market paying?

Performance metrics describe the business. Valuation metrics compare that business with the price placed on its shares by the market.

The central discipline is simple: a business can be high quality and still be priced so optimistically that future returns disappoint. Conversely, a modest valuation can reflect real risks: weak growth, declining margins, debt, regulation, cyclicality, or poor capital allocation.

Price-to-earnings: P/E

The trailing P/E ratio is:

$$\text{P/E}=\frac{\text{Current share price}}{\text{Trailing twelve month diluted EPS}}$$

The equivalent company-level form is:

$$\text{P/E}=\frac{\text{Market capitalization}}{\text{Trailing twelve month net income attributable to common shareholders}}$$

If the company’s share price is USD 32.70 and its trailing diluted EPS is USD 2.18:

$$\text{P/E}=\frac{32.70}{2.18}=15.0$$

Investors are paying about $15$ times the company’s trailing annual earnings per share.

A trailing P/E uses earnings already reported. A forward P/E uses forecast earnings, usually analyst consensus estimates. The latter can be useful, but it is conditional on the forecast being achieved. Never compare one company’s trailing P/E with another company’s forward P/E without clearly labeling the difference.

P/E is generally not meaningful when earnings are negative. It can also be distorted when profits are temporarily high or low, as often occurs in commodity businesses, cyclical manufacturers, or companies with a material one-off gain or impairment.

Price-to-sales: P/S

P/S values each unit of revenue:

$$\text{P/S}=\frac{\text{Market capitalization}}{\text{Trailing twelve month revenue}}$$

Using a market capitalization of USD 1.8 billion and trailing revenue of USD 1.15 billion:

$$\text{P/S}=\frac{1,800}{1,150}=1.57$$

The market values the company at roughly $1.57$ times its trailing annual sales.

P/S is especially useful when a company is currently loss-making and P/E cannot be used. Revenue is usually less volatile than earnings and harder to change through accounting judgments. But sales are not profits. Two companies can have identical P/S ratios while one has superior margins, recurring revenue, low capital needs, and strong cash conversion.

A high P/S can be reasonable for a rapidly growing company with strong margins and a credible path to free cash flow. A low P/S can be a warning that the market doubts margins, growth, or even the quality of the reported revenue.

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Free-cash-flow yield: cash generation relative to equity value

In the earlier cash-flow lesson, you used a practical definition of free cash flow:

$$\text{Free cash flow}=\text{Operating cash flow}-\text{Capital expenditures}$$

Free-cash-flow yield then compares that cash flow with the market value of shareholders’ equity:

$$\text{Free cash flow yield}=\frac{\text{Trailing twelve month free cash flow}}{\text{Market capitalization}}\times 100$$

For the illustrative company, assume operating cash flow of USD 180 million and capital expenditures of USD 60 million:

$$\text{Free cash flow}=180-60=120\text{ million}$$ $$\text{Free cash flow yield}=\frac{120}{1,800}\times 100=6.7\%$$

A $6.7\%$ free-cash-flow yield means that trailing free cash flow equals $6.7\%$ of the company’s current market capitalization. It is not a guaranteed investor return, dividend yield, or prediction of next year’s cash flow. The company may need the cash for investment, debt repayment, acquisitions, or working-capital needs.

The historical table shows free-cash-flow yield based on market capitalization of $6.23\%$ for Apple, $3.59\%$ for Fluor, $6.49\%$ for Cisco, and $13.32\%$ for General Electric. The figures are not current data and should not be used as investment conclusions. They are useful because they reveal a key analytical issue: changing the denominator changes the meaning.

• Market-capitalization FCF yield is an equity-holder measure. It is the appropriate starting point when using free cash flow available to equity holders.
• Enterprise-value FCF yield incorporates debt and cash through enterprise value. It can be useful, but ideally it should be paired with a cash-flow measure that reflects all capital providers, not casually mixed with an equity cash-flow definition.

The sharp difference in the table’s General Electric figures is a reminder that a high market-cap FCF yield can coexist with substantial debt. This is why the balance-sheet analysis from the previous lesson remains essential.

Limits of free-cash-flow yield

A high FCF yield may reflect attractive value, but it may also reflect:

• a share price depressed by real business risk;
• cyclically elevated cash flows;
• unusually low capital expenditures that cannot persist;
• a temporary release of working capital, such as inventory falling;
• a business with declining revenue and limited reinvestment opportunities.

A low FCF yield can reflect expensive shares, but it may also reflect a company investing heavily for future growth. Check whether capital expenditure is building productive capacity or merely maintaining an aging asset base.

Always state the definition used. Some data services adjust for leases, stock-based compensation, acquisitions, or other cash items differently. For a first-pass comparison, consistently using operating cash flow less capital expenditures from each company’s cash-flow statement is better than mixing vendor-defined numbers.

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Bring the metrics together: a worked peer comparison

Suppose the illustrative company has these results:

Metric	Target company	Peer A	Peer B
Diluted EPS growth	9%	6%	18%
ROE	16.7%	14.0%	21.0%
P/E	15.0	13.0	21.0
P/S	1.57	1.40	2.40
FCF yield	6.7%	7.4%	4.0%

A weak conclusion would be: “Peer A is cheapest because it has the lowest P/E.” A better preliminary interpretation is:

• Peer A trades at lower P/E and P/S multiples and has a higher FCF yield, but it also has slower EPS growth and lower ROE. The market may be pricing slower growth or lower business quality.
• Peer B has the fastest EPS growth and strongest ROE, but investors pay the highest P/E and P/S and receive the lowest current FCF yield. Its valuation requires stronger future execution.
• The target company sits between the peers. Its valuation and operating results appear broadly middle-of-the-group. The next research task is to determine whether its future prospects, margins, debt position, and competitive position justify that middle valuation.

This is the central habit of fundamental analysis: explain the relationship among the metrics instead of treating a low multiple or high yield as automatically favorable.

A compact valuation note might read:

Diluted EPS grew $9\%$, below the faster-growth peer but ahead of the slower mature peer. ROE of $16.7\%$ suggests reasonable profitability on book equity, subject to checking leverage and buybacks. At $15$ times trailing EPS and a $6.7\%$ free-cash-flow yield, the shares are priced between the peer group’s cheaper, slower-growth company and its more expensive, faster-growth company. The key unresolved issue is whether current growth and cash generation are durable.

That is evidence-based, conditional, and far more useful than a bare price target.

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A practical worksheet for one company and two peers

Spend about 10–15 minutes building a simple spreadsheet for one US or UK company and two close peers. Use the company’s annual report or results release for the accounting data; use TradingView for a dated market price and its financial-data view as a cross-check.

Use these columns:

Input or calculation	Target	Peer 1	Peer 2
Fiscal period and currency
Revenue, current and prior year
Net income attributable to common shareholders
Diluted EPS, current and prior year
Beginning and ending common equity
Operating cash flow
Capital expenditures
Current market capitalization and date
EPS growth
ROE
P/E
P/S
FCF yield

Below the table, write three short notes:

1. What explains the target company’s earnings growth?
2. Is its valuation lower or higher than peers, and what plausible risk or strength might explain that difference?
3. Which figure is least reliable or most in need of checking in the notes to the accounts?

Do not use the sheet to make a real-money trade. Its purpose is to practice a repeatable research process and identify what you still need to know.

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Key takeaways

• Calculate both net-income growth and diluted EPS growth; EPS better reflects the economic claim of each shareholder when share count changes.
• ROE compares net income with average shareholder equity. Strong ROE can indicate efficiency, but leverage, buybacks, and low equity can inflate it.
• P/E compares current price with earnings. Use consistent trailing or forward definitions, and do not interpret negative-earnings P/E as meaningful.
• P/S is useful when earnings are negative, but revenue alone says little about margins, capital intensity, or free cash flow.
• Free-cash-flow yield compares trailing FCF with market capitalization. It is not a promised return, and it needs a clearly stated FCF definition.
• The value of each metric lies in comparison: first against the company’s own history, then against carefully selected peers with similar economics.

Next, you will use these metrics with the financial-statement evidence from this module to write a concise stock thesis: business quality, valuation, possible catalysts, and the risks that could prove the thesis wrong.