What Is P/B Ratio? P/B Ratio Meaning
What is P/B ratio? The P/B ratio (price-to-book, or P/B) compares a company's stock price to its book value per share. It answers: How much do investors pay for each dollar of the company's net assets (shareholders' equity)?
P/B ratio meaning: Book value is shareholders' equity—total assets minus total liabilities. The P/B ratio shows whether the stock trades at a premium or discount to that accounting value. A P/B of 1.0 means the stock trades at book value. Below 1 suggests potential undervaluation (or market skepticism about asset quality). Above 1 means a premium—investors pay more than book, often for intangibles or future earnings.
P/B Ratio Formula
The P/B ratio formula is:
P/B = Stock Price ÷ Book Value Per Share
Or: P/B = Market Cap ÷ Shareholder Equity. Book value per share = Shareholder Equity ÷ Shares Outstanding.
Example: Stock price $60, book value per share $40 → P/B = $60 ÷ $40 = 1.5. The stock trades at 1.5 times book value.
What Does PB Tell You?
What does PB tell you? P/B tells you how the market values the company relative to its balance-sheet equity. It reflects the premium or discount to accounting book value.
A low P/B may suggest the stock is cheap relative to assets—or that the business earns low returns on equity. A high P/B may reflect strong earnings power, growth expectations, or valuable intangibles (brands, patents) not fully captured in book value. P/B is especially useful for banks, insurers, and other asset-heavy businesses where book value is a meaningful anchor. It is less useful for asset-light companies (e.g., software) where most value is intangible.
What Is a Good P/B Ratio?
What is a good P/B ratio? or What is a good PB ratio?—they mean the same. There is no universal answer; it depends on the industry and company quality.
- Below 1.0: Value territory. The stock trades below book—possibly undervalued or the market doubts asset quality.
- 1.0–3.0: Common range for many mature companies. A P/B of 1.5 is moderate.
- Above 3.0: Often growth or quality premiums. Requires strong ROE or growth to justify.
Compare to sector peers. Banks often trade near 1x book. Tech and consumer brands may trade at 5–10x or higher. A "good" P/B is one that makes sense given ROE, growth, and industry norms.
What Does a 1.5 PB Ratio Mean?
What does a 1.5 PB ratio mean? A P/B of 1.5 means the stock trades at 1.5 times its book value per share. Investors pay $1.50 for every $1 of shareholders' equity.
A 1.5 P/B indicates a moderate premium to book. The market values the company above its net assets—often because of earnings power, growth, or intangibles. For many mature, profitable companies, 1.5x is a reasonable multiple. Compare to the sector average: if peers trade at 2x, 1.5x may be relatively cheap; if peers are at 1x, 1.5x may be relatively expensive.
Is a Higher or Lower PB Better?
Is a higher or lower PB better? It depends on your investing style and the context.
Lower P/B is typically preferred by value investors. P/B below 1 can signal potential undervaluation—you pay less than the accounting value of net assets. But a low P/B may also reflect poor profitability (low ROE) or assets that are overstated or hard to liquidate.
Higher P/B is often acceptable for growth companies with strong returns on equity. A company earning 20% ROE can justify a higher P/B than one earning 5%. The key is ROE: a lower P/B with high ROE is often attractive; a high P/B with low ROE may be overvalued. In general, value investors favor lower P/B; growth investors may accept higher P/B for quality businesses.
P/B Ratio and ROE
P/B and ROE (return on equity) are related. A company with high ROE can justify a higher P/B—the market pays for earnings power. A low P/B with high ROE may be a value opportunity. A high P/B with low ROE may signal overvaluation. The relationship P/B ≈ ROE × P/E (simplified) shows how these metrics connect. Use both when evaluating stocks.
Limitations of P/B
Book value is based on historical cost; it may not reflect true market value of assets. Intangibles (brands, goodwill) can distort book value. Service and tech companies often have modest book value but high market caps—P/B is less meaningful. Negative book value (e.g., after heavy losses) makes P/B uninterpretable. Use P/B alongside P/E, ROE, and other metrics.
P/B Ratio Example
Company A: Stock $80, book value per share $100 → P/B = 0.8. Trades below book. Company B: Stock $120, book value $40 → P/B = 3.0. Trades at 3x book. Company A may appeal to value investors if ROE is respectable. Company B needs strong ROE or growth to justify the premium. Compare both to sector averages.
Frequently Asked Questions
What is P/B ratio?
The P/B ratio (price-to-book) compares a company's stock price to its book value per share. It shows how much investors pay for each dollar of net assets. P/B = Stock Price ÷ Book Value Per Share (or Market Cap ÷ Shareholder Equity). The P/B ratio meaning: a ratio of 1 means the stock trades at book value; below 1 suggests potential undervaluation; above 1 means a premium to book.
What does P/B ratio mean?
P/B ratio meaning: it tells you the multiple of book value (shareholders' equity per share) that the market is willing to pay. A P/B of 2 means investors pay $2 for every $1 of book value. A P/B below 1 means the stock trades at less than the value of its net assets—potentially undervalued or the market doubts those assets. P/B reflects the premium or discount to accounting book value.
What does PB tell you?
PB tells you how the market values a company relative to its balance-sheet equity. Low P/B may indicate value opportunity or that the business has low returns on equity. High P/B may reflect growth expectations, intangibles (brands, patents), or overvaluation. PB is especially useful for asset-heavy companies (banks, industrials) where book value is meaningful. It is less useful for asset-light or high-growth companies.
What is a good P/B ratio?
A good P/B ratio depends on the industry. Value investors often look for P/B below 1.0. For many sectors, P/B of 1–3 is common. Growth companies may trade at 5–10x or higher. Banks and financials often trade near 1x book. Compare to sector peers. A "good" P/B is one that suggests the stock is fairly valued or undervalued given the company's ROE, growth, and asset quality.
What does a 1.5 PB ratio mean?
A 1.5 P/B ratio means the stock trades at 1.5 times its book value per share. Investors pay $1.50 for every $1 of shareholders' equity. It suggests a moderate premium to book—the market values the company above its net assets, often due to earnings power, growth, or intangibles. For many mature companies, 1.5x is reasonable. Compare to sector averages to judge if it is cheap or expensive.
Is a higher or lower PB better?
For value investors seeking bargains, a lower P/B is typically better—it may indicate undervaluation. For growth investors, a higher P/B can be acceptable if the company earns strong returns on equity and has growth potential. Generally: P/B below 1 can signal value (or trouble). P/B above 3+ often requires strong justification (high ROE, growth). Context matters—compare to peers and consider ROE. Lower P/B with high ROE is often attractive.