Book Value
Book value is what remains after subtracting a company’s total liabilities from its total assets, the same figure the balance sheet reports as shareholders’ equity. Divided by shares outstanding, it becomes book value per share, the denominator of the price-to-book ratio and a traditional anchor for value investors.
The math
Take $900M of assets against $600M of liabilities: book value is $300M. With 50 million shares outstanding, that is $6.00 per share, so a $9.00 stock trades at 1.5x book.
The quality of the ratio depends entirely on the quality of the assets. If $150M of the asset side is goodwill and capitalized intangibles, tangible book value drops to $3.00 per share and the stock actually trades at 3x tangible book.
| Stated book | Tangible book | |
|---|---|---|
| Book value | $300M | $150M |
| Per share | $6.00 | $3.00 |
| Multiple at $9.00 | 1.5x | 3.0x |
An investor who bought 10,000 shares believing they were paying a modest premium to hard assets committed $90,000 against $30,000 of tangible backing, not $60,000.
The trap
Book value records history, not worth. Real estate bought decades ago sits at depreciated cost far below market; a failing product line sits at values no buyer would pay.
Cheap price-to-book screens are full of businesses whose assets earn poor returns, and a pile of assets earning 4% deserves to trade below book. Buying “cheap on book” without checking return on equity is how value investors acquire slow losses.
The move
Always pair book value with the return earned on it: a business compounding equity at 18% merits a premium to book, one earning 5% merits a discount. Strip goodwill for a tangible view, especially after acquisitions.
Reserve book-based valuation for banks, insurers, and asset-heavy industries where balance sheet values stay close to economic reality, and lean on earnings power everywhere else.