What is Book Value?
Book value represents what shareholders would theoretically receive if a company liquidated all assets and paid off all debts. If a company has $10 billion in assets and $6 billion in liabilities, its book value is $4 billion. Book value per share divides this by outstanding shares - with 500 million shares, that equals $8.00 per share. This figure anchors the price-to-book (P/B) ratio, a key valuation metric.
Book Value vs. Market Value
Market value often diverges significantly from book value. As of 2025, Apple's market capitalization exceeded $3 trillion while its book value was roughly $60 billion - a P/B ratio above 50. This gap reflects intangible assets like brand value, intellectual property, and future earnings potential that accounting rules do not fully capture. Conversely, some banks trade below book value during crises, implying the market doubts their assets are worth what the balance sheet claims.
Key Considerations
Book value is most useful for asset-heavy industries like banking, insurance, and real estate where balance sheet assets closely approximate real economic value. For technology and service companies, book value understates true worth because R&D spending, brand equity, and human capital are not capitalized on the balance sheet. Tangible book value, which excludes goodwill and other intangible assets, provides an even more conservative floor valuation.