PB Ratio
Price-to-Book (P/B) ratio compares a stock's market price to its book value. It's especially useful for asset-heavy companies.
P/B ratio answers: "Am I paying more or less than the company's net asset value?" It's particularly relevant for banks, real estate, and manufacturing companies.
What is P/B Ratio?
P/B Ratio = Market Price per Share / Book Value per Share
Where: Book Value per Share = Shareholders' Equity / Number of Shares
Example:
- Stock price: ₹300
- Book value per share: ₹200
- P/B = 300 / 200 = 1.5x
How to Interpret P/B
| P/B Range | Interpretation |
|---|---|
| Under 1 | Trading below book value |
| 1 | At book value |
| 1-3 | Normal range for quality companies |
| Over 3 | Premium to book value |
P/B below 1 doesn't automatically mean a bargain. The assets might be worth less than stated on the books.
When to Use P/B
P/B works best for:
| Industry | Why P/B Works |
|---|---|
| Banks | Assets (loans) are at fair value |
| Insurance | Investment portfolios at market value |
| Real Estate | Property values matter |
| Manufacturing | Tangible asset base |
| NBFCs | Loan book valuation |
P/B doesn't work well for:
| Industry | Why P/B Fails |
|---|---|
| IT/Software | Few tangible assets |
| Consultancy | Value is in people, not assets |
| Brands | Intangibles not fully reflected |
For banks, P/B is the primary valuation metric. A good bank at 1.5x book is different from a troubled bank at 0.5x book.
Understanding Book Value
Book value components:
- Share capital at face value
- Reserves and retained earnings
- Less: Intangible assets (optionally)
Tangible Book Value = Book Value - Intangible Assets
This is more conservative and excludes goodwill.
P/B Limitations
| Limitation | Explanation |
|---|---|
| Historical cost | Assets are recorded at purchase price, not current value |
| Intangibles ignored | Brand, patents, talent not fully captured |
| Land revaluation | Old land might be worth much more |
| Hidden liabilities | Contingent liabilities not on books |
P/B for Banks
For banks, P/B is especially important:
| Bank Quality | Typical P/B |
|---|---|
| High quality (HDFC Bank) | 2.5-4x |
| Good quality | 1.5-2.5x |
| Average | 1-1.5x |
| Poor/troubled | under 1x |
Low P/B in banks often signals:
- Bad loan problems
- Low profitability
- Weak management
Historical P/B Comparison
Like P/E, compare to history:
| Current vs Historical | Signal |
|---|---|
| Above average | May be overvalued |
P/B vs P/E
| Metric | Use When |
|---|---|
| P/E | Earnings are stable and meaningful |
| P/B | Assets drive value (banks, real estate) |
| Both | For a complete picture |
Cheap on P/B but expensive on P/E means low ROE (poor returns on assets). Think about why.
Key Takeaways
- P/B compares price to book value (net assets)
- Most useful for asset-heavy industries and banks
- P/B under 1 isn't always cheap – investigate why
- Compare to peers and historical range
- For banks, P/B is often the primary metric
Next: ROE and ROCE – how efficiently is the company using capital?
Sources & Disclaimer
- ICAI Financial Reporting Standards
- Companies Act 2013 - Financial Statement Formats
Note: Any benchmarks (e.g., "Good ROE is > 20%", or specific P/E ranges) are simplified industry heuristics for educational purposes. True evaluation depends on specific industry context, market cycles, and individual company circumstances.