About This Article
This article summarizes the key indicators used in fundamental analysis for value investing in the stock market.
Metrics like PER and PBR (among many others) come up constantly in value investing. I found that while individual indicator explanations are easy to find online, consolidated reference lists with all indicators together are rare — so I put this together as both a personal reference and a resource for others.
I start with a summary table showing typical values and value-investing target benchmarks, then explain each indicator in detail.
What Is Value Investing?
Before diving into the indicators, let me briefly explain value investing itself. Feel free to skip this if you already know.
Value investing is a strategy of identifying stocks that are undervalued (trading below their fair value) in the stock market, buying and holding them long-term, and waiting for the market to eventually recognize their true worth.
Stock prices are fickle — most people ignore company fundamentals and chase whatever is currently trending (AI, IT, etc.), driving those stocks to high prices. But over time, companies with solid earnings tend to settle at prices reflecting their actual performance, while trend-driven stocks often crash back down.
Value investing ignores short-term price noise and focuses instead on the company’s intrinsic value (fundamental value) — its earnings, financial health, and core business. Analyzing this intrinsic value is called fundamental analysis, and investing in stocks judged undervalued through that analysis is value investing.
The concept was first formally articulated in 1934 by Benjamin Graham and David Dodd in Security Analysis. But value investing became famous as a major strategy largely due to Warren Buffett, who improved on Graham’s approach and became one of the world’s wealthiest people through his own brand of value investing.
Other notable strategies include technical analysis (predicting future price from chart patterns) and growth (GARP) investing (targeting stocks expected to appreciate significantly due to investor expectations).
If interested, I recommend reading one of Warren Buffett’s books — he knows value investing better than anyone.
Indicator Summary Table
The table below summarizes the main fundamental analysis indicators used in value investing, with typical values and value-investing benchmarks.
These values are general guidelines — exact ranges vary significantly by industry, so for serious analysis, compare against the industry average for the target company.
| Indicator | Typical Value | Value Investing Benchmark | Notes |
|---|---|---|---|
| PER | ~15x | 10x or below | Lower = more undervalued |
| PBR | 1x | 0.8x or below | Lower = more undervalued |
| ROE | 8–10% | 10%+ | Higher is better; compare with ROA |
| ROA | 3–5% | 5%+ | Higher is better; compare with ROE |
| BPS | — | — | Depends on company scale |
| EPS | — | — | Depends on company scale |
| EV/EBITDA | ~8x | 8x or below | Lower = more undervalued |
| Market Cap | — | — | Under ¥10B tends to have more growth potential |
| Dividend Yield | 1–3% | 4%+ | Higher is better |
| Revenue Growth Rate | 5–10% | 10%+ | Higher is better |
| Operating Margin | ~5% | 10%+ | Higher is better |
| Net Profit Margin | ~5% | 10%+ | Higher is better |
| Debt Ratio | 100–150% | 100% or below | Lower = more financially stable |
Indicator Details
Here is a brief explanation of each indicator.
PER (Price-to-Earnings Ratio)
PER stands for “Price Earnings Ratio” — also called the price-to-earnings ratio. It measures how much the current stock price values the company’s earnings per share.
Formula: PER = Current Stock Price ÷ Earnings Per Share (EPS)
Example: if the stock price is ¥1,000 and EPS is ¥100, PER = 10x.
Why does PER matter? At its core, a company belongs to its shareholders. The profits it generates are, in principle, returned to shareholders as dividends. If a company were to pay out 100% of earnings as dividends (rare in practice), at PER 10x, it would take 10 years to recoup your investment.
In other words, PER indicates how many years it would take to recover your investment from earnings alone. A PER of 10x (10 years to recover) is more attractive than 20x (20 years to recover).
That said, in modern markets, few investors wait decades for returns. Short-term traders will still buy high-PER stocks if they expect quick price appreciation.
Typical PER for Japanese companies averages around 15x. Below 10x is considered undervalued; above 40x is, in Buffett’s view, a full bubble (above 20x is generally considered elevated).
PBR (Price-to-Book Ratio)
PBR stands for “Price Book-value Ratio” — also called the price-to-book ratio. It measures how the current stock price compares to the company’s net assets (book value) per share.
Formula: PBR = Current Stock Price ÷ Book Value Per Share (BPS)
Example: if the stock price is ¥1,000 and BPS is ¥1,000, PBR = 1.0x.
If a company dissolved today and distributed all assets to shareholders, each shareholder would theoretically receive assets proportional to BPS (in reality, liabilities complicate this). So:
- PBR = 1.0x → price roughly equals book value (fair)
- PBR > 1.0x → stock priced above book value (premium for expected growth)
- PBR < 1.0x → stock priced below book value (potentially undervalued)
Most popular companies trade above 1.0x PBR because the market expects future growth. Companies with shrinking prospects often trade below 1.0x.
Importantly, a PBR of 0.5x doesn’t automatically mean “great buy” — if the company has no future, the price may simply stay low indefinitely.
ROE (Return on Equity)
ROE stands for “Return On Equity” — also called return on equity or equity return rate. It measures how efficiently a company uses shareholder capital to generate profit.
Formula: ROE = Net Profit ÷ Equity × 100
Example: ¥100 million net profit ÷ ¥1 billion equity = 10% ROE.
Unlike PER and PBR, ROE doesn’t tell you whether the stock is cheap or expensive — it measures management efficiency, specifically how well the company converts shareholder investment into profits.
High ROE → company uses capital efficiently → attractive to investors. Low ROE → capital is being used poorly → unattractive.
Average ROE for Japanese companies is around 5–10%. Above 10% is considered quite efficient.
However, high ROE is not always a positive signal. Companies with very large debt (liabilities) relative to equity tend to show high ROE, which can be misleading. This is why you should always compare ROE with ROA.
ROA (Return on Assets)
ROA stands for “Return On Assets” — also called total asset return rate. It measures how efficiently a company uses all its assets (not just equity) to generate profit.
Formula: ROA = Net Profit ÷ Total Assets × 100
Example: ¥100 million net profit ÷ (¥1 billion equity + ¥1 billion liabilities) = 5% ROA.
ROE divides by equity only; ROA divides by total assets including debt. So ROA is always lower than or equal to ROE (equal only if a company has zero debt).
ROA gives a more fundamental picture of operational efficiency, but some industries structurally require large liabilities (e.g., banking, real estate), making comparisons across industries difficult.
Average ROA is around 3–5%. Above 5% is considered good.
ROE vs. ROA comparison:
- High ROE + Low ROA → likely heavy debt load (concern)
- Low ROE + High ROA → possible equity utilization inefficiency
Examples:
- ¥100M profit, ¥1B equity, ¥1B debt → ROE 10%, ROA 5% → healthy
- ¥100M profit, ¥500M equity, ¥2B debt → ROE 20%, ROA 4% → high debt is a concern
- ¥100M profit, ¥2B equity, ¥500M debt → ROE 5%, ROA 4% → operational inefficiency
BPS (Book Value Per Share)
BPS stands for “Book-value Per Share.” It is rarely used as a standalone indicator — it’s most useful as a component of the PBR calculation.
Formula: BPS = Net Assets ÷ Shares Outstanding
Example: ¥10 billion net assets ÷ 10 million shares = BPS ¥1,000.
BPS represents how much of the company’s net assets backs each share. If the company dissolved, shareholders would theoretically receive this amount per share (in practice, liabilities affect the actual payout).
Since BPS depends entirely on company scale, it’s not useful for comparing across companies. Its primary use is as an input to calculate PBR.
EPS (Earnings Per Share)
EPS stands for “Earnings Per Share” — also called per-share net profit. Like BPS, it is most commonly used as a component of the PER calculation.
Formula: EPS = Net Profit ÷ Shares Outstanding
Example: ¥100 million net profit ÷ 10 million shares = EPS ¥10.
Larger EPS generally indicates a more profitable company, but like BPS, the absolute value depends on company scale, making cross-company comparison difficult.
Where EPS is uniquely useful: tracking the trend over time for a single company. EPS growth shows how much per-share profitability has grown. It’s more precise than tracking net profit growth rates alone, because stock splits or new share issuances change per-share values — EPS adjusts for those automatically.
EV/EBITDA Ratio
The EV/EBITDA ratio expresses how many times EV (Enterprise Value) is relative to EBITDA (Earnings Before Interest, Taxes, Depreciation, and Amortization).
EV = Market Cap + Total Debt − Cash and Equivalents EBITDA = Operating Profit + Depreciation EV/EBITDA = EV ÷ EBITDA
This metric is used internationally to evaluate M&A transactions — it answers “how many years of operating profit would it take to recover the acquisition cost?”
EV is a better measure of true acquisition cost than market cap alone, because acquiring a company means also assuming its debts and receiving its cash on hand.
EBITDA is used instead of simple net profit to remove the distorting effects of different countries’ tax rates, interest rates, and depreciation rules — enabling cross-border comparisons.
A typical EV/EBITDA ratio is around 8–10x. Below 8x suggests a relatively cheap acquisition.
Note: like PER, EV/EBITDA tells you how long it would take to recoup an investment from earnings, but EV/EBITDA accounts for debt and cash, making it more practical for M&A evaluation. PER cannot evaluate companies with negative earnings; EV/EBITDA has no such limitation.
Market Capitalization
Market capitalization (市場時価総額 / Market Cap) measures a company’s total market value.
Formula: Market Cap = Current Stock Price × Shares Outstanding
Example: stock price ¥1,000 × 10 million shares = ¥10 billion market cap.
Toyota Motor, for example, had approximately ¥60 trillion in market cap as of April 2024 — an illustration of scale.
Market cap is commonly used to describe company size. Japan’s top companies by market cap include Toyota, SoftBank Group, Keyence, NTT Docomo, Sony, and NTT.
For value investing, market cap is a useful context indicator. Suppose two companies have nearly identical fundamental indicators — but one has a ¥1 trillion market cap and the other ¥10 billion. Which would you invest in?
The smaller company has far more room for rapid growth — moving from ¥10 billion to ¥100 billion is much more achievable than from ¥1 trillion to ¥10 trillion. Small-cap stocks (roughly ¥10 billion or below in Japan) tend to offer higher growth potential for this reason.
That said, larger companies are generally more stable, more liquid, and better at weathering crises. Choose based on your investment goals.
Dividend Yield
Dividend yield measures annual dividends received relative to the current share price.
Formula: Dividend Yield = Annual Dividend Per Share ÷ Current Stock Price × 100
Example: ¥50 annual dividend ÷ ¥1,000 stock price = 5% dividend yield.
High-dividend stocks are popular with income-focused investors — they provide steady returns regardless of whether the stock price rises.
From a value investing perspective, high dividends often indicate a shareholder-friendly management culture and stable earnings. The typical threshold for “high dividend” is a yield of 4% or above.
However, dividends can be cut or eliminated if earnings deteriorate. And a very high dividend yield may indicate that the market expects the dividend to be reduced — so always verify that the dividend is sustainable.
Revenue Growth Rate
Revenue growth rate measures how much a company’s sales have grown year-over-year.
Formula: Revenue Growth Rate = (Current Year Revenue − Prior Year Revenue) ÷ Prior Year Revenue × 100
High and sustained revenue growth indicates a company is expanding its market share and business. The typical benchmark: 5–10% is average; 10%+ is strong.
Keep in mind that for very large companies, maintaining high growth rates is structurally harder. Compare within the same industry for meaningful analysis.
Operating Margin
Operating margin (営業利益率) measures what percentage of revenue becomes operating profit.
Formula: Operating Margin = Operating Profit ÷ Revenue × 100
High operating margin indicates an efficient business model. Industry averages vary enormously (manufacturing tends to be low; software tends to be high). The general value investing benchmark is 10%+.
Net Profit Margin
Net profit margin (純利益率) measures what percentage of revenue becomes net profit after all costs, interest, and taxes.
Formula: Net Profit Margin = Net Profit ÷ Revenue × 100
Similar to operating margin but more comprehensive — it shows whether a company can translate revenue into bottom-line profit. Benchmark: 10%+.
Debt Ratio
Debt ratio (負債比率 / Debt-to-Equity Ratio) measures total liabilities relative to equity.
Formula: Debt Ratio = Total Liabilities ÷ Equity × 100
Lower debt ratio indicates greater financial stability. The general benchmark for value investing: 100% or below. Some industries (banking, real estate) structurally require high debt, so industry context matters.
Summary
This article covered the main fundamental analysis indicators used in value investing.
None of these indicators are absolute — they all have limitations and must be interpreted in context. When evaluating a company, use multiple indicators together rather than relying on any single metric.
I’ve also written a separate article on market-wide overheating indicators (Buffett Indicator, VIX Index, AAII Sentiment Survey). Check it out if interested.
