The price-to-book (P/B) ratiocompares a company's market value with the equity recorded on its financial statements (book value). In simple terms: how much are investors paying for each unit of the company's recorded net assets?
P/B Ratio Formula
P/B ratio = share price ÷ book value per share
It can also be calculated as market capitalization divided by total shareholders' equity. Book value per share = equity ÷ shares outstanding.
Simple Example
Suppose a stock trades at 40 SAR and book value per share is 20 SAR:
40 ÷ 20 = 2
The P/B is 2x — investors pay twice book value for the share. This is a hypothetical educational example.
Why It Matters Most for Banks
For banks and insurers, most assets are loans and financial investments carried near book value, so P/B is often more reliable than the PE ratio, which can swing with provisions. That is why it is widely used when analyzing Saudi banks.
Pair It With Return on Equity
P/B should not be read alone. A company that earns a high return on equity deserves a higher P/B, and vice versa. A high P/B with a low return can signal overvaluation.
When It Can Mislead
- For technology and services firms that rely on intangible assets not fully recorded on the books.
- When large goodwill inflates equity.
- When equity is negative, making the ratio meaningless.
How to Use It on Wrqti
Open any page in Stock Insights and review P/B alongside the PE ratio and return on equity. Example: compare the ratio for a bank like Al Rajhi with peers in the same sector.
Summary
P/B is a strong tool for valuing banks and asset-heavy companies but weak for intangible-heavy firms. Always use it with return on equity and asset quality.
FAQ
What is the P/B ratio in simple terms?
It compares a stock's market value with its book equity, showing how much investors pay for each unit of the company's recorded net assets.
When is the P/B ratio most useful?
It is most useful for banks, insurers, and asset-heavy companies whose assets are close to book value, and least useful for technology and services firms that rely on intangible assets.
Does a P/B below 1 mean a stock is cheap?
Not always. It can signal expected losses or a weak return on equity. Compare it with return on equity and asset quality before drawing conclusions.
Is the P/B ratio a buy or sell signal?
No. P/B is one analytical tool only and is not enough by itself to make an investment decision.
Also read the Financial Disclaimer.