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6.3What is the P/B ratio?

1What is it?

The Price-to-Book (P/B) ratio compares the share price with the company’s book value per share (its net worth on paper).

2Why does it exist?

It shows how much the market pays over the accounting net worth. It is especially useful for banks and financial companies, whose assets are mostly money.

3Diagram
High value means…

The market values strong profitability or intangibles (brands, technology).

Low value means…

Possible value opportunity, or the market doubts the asset quality (e.g. a bank with bad loans).

Is high or low good?

Lower is cheaper, but high-ROE companies deserve higher P/B. Compare P/B together with ROE.

4Calculation
P/B = Share price ÷ Book value per share
  1. Price = ₹1,800; book value per share = ₹600.
  2. P/B = 1,800 ÷ 600 = 3.
The market values the company at 3× its net worth.
5Risks
  • Less useful for asset-light companies (IT, FMCG) whose value is in people and brands.
  • Book values can be distorted by write-offs.
6Practical use

Always compare a ratio with (1) the company’s own history and (2) other companies in the same industry. A single number on its own means little.

7Quick revision
  • P/B = price ÷ book value per share.
  • Key metric for banks.
  • Read with ROE.
8Knowledge check
Q1. Price ₹300, BVPS ₹150. P/B?Show answer

2.

Q2. P/B below 1 means?Show answer

The market values the company below its book net worth.

Q3. For which sector is P/B most useful?Show answer

Banking and finance.

More in Level 6: Fundamental Analysis: How to Find Good Companies