Price-to-Book Ratio
The market price of a share divided by its book value per share.
Formula
P/B = Market Price per Share / Book Value per Share
Unit
ratio (x, times)
In depth
Price-to-book compares what the market pays with what the accounts record, which works well for banks and financial firms whose assets are financial and carried near fair value, and badly for asset-light businesses whose value is in brands, people and software the balance sheet never recorded. A ratio below one does not mean a bargain: it often means the market expects the assets to earn less than their carrying value, which is a forecast of write-downs. Book value is also distorted by buybacks above book, accumulated losses and acquisition goodwill. The ratio is closely tied to return on equity, since a company earning well above its cost of equity deserves to trade well above book.
Worked example
A share at ₹60 with book value per share of ₹15 trades at a P/B of 4. With return on equity of 20% against a cost of equity of 12%, the premium is what the ratio should look like — the business earns more on its book than the book costs.
Illustrative figures, chosen so the arithmetic is easy to follow. Not a live price and not a valuation of any company.
Educational reference only
This entry explains what “Price-to-Book Ratio” means. It is not investment advice and not a recommendation to buy or sell any security. Any numbers above are illustrative, not live prices, and nothing here predicts price direction or rates a stock. Consider your own circumstances and consult a SEBI-registered investment adviser before acting.