Book value represents the total net asset value of a company, calculated as total assets minus total liabilities from the balance sheet. It shows what shareholders would theoretically receive if the company were liquidated.
Per-share version: Book Value Per Share (BVPS) = (Total Shareholders' Equity − Preferred Stock) ÷ Outstanding Shares
A company has total assets of $500 million and total liabilities of $300 million. Book value = $500M − $300M = $200 million. With 50 million shares outstanding, the book value per share is $200M ÷ 50M = $4.00 per share.
Book value tells you the accounting value of a company's equity. When a stock trades below its book value per share (Price-to-Book ratio below 1.0), it may be undervalued — the market is pricing the company at less than the value of its net assets. However, this could also signal that the market expects the assets to lose value or that the business model is deteriorating.
Book value is one of the oldest and most fundamental valuation metrics, dating back to Benjamin Graham's value investing philosophy in the 1930s. It provides a "floor" for a company's value — if a stock consistently trades below book value, either the assets are overvalued on the balance sheet, or the market is missing something. For asset-heavy industries like banking, insurance, and real estate, book value is often the primary valuation metric analysts use.
During market downturns, book value becomes especially important. In the 2008 financial crisis, many bank stocks traded below book value because investors feared the assets (particularly mortgage-backed securities) were worth far less than their balance sheet values. When Bank of America traded at 0.3× book value in early 2009, investors who correctly assessed that the assets were sound made extraordinary returns as the stock recovered over 500% in the following years.
Book value also serves as a sanity check for growth stock valuations. When a software company trades at 20× book value, investors are paying an enormous premium over the net assets, essentially betting that intangible assets — brand, technology, customer relationships — will generate far more value than what appears on the balance sheet.
Berkshire Hathaway (BRK.A) famously uses book value as a key benchmark. Warren Buffett long tracked book value per share growth as a measure of the company's intrinsic value creation. From 1965 to 2023, Berkshire's book value per share grew at a compound annual rate of roughly 19.8%, compared to the S&P 500's 10.2%. Buffett eventually moved away from book value as a primary metric because Berkshire's massive stock portfolio made book value too volatile, but it remains a cornerstone of his investment philosophy.
In the banking sector, JPMorgan Chase typically trades at 1.5–2.0× book value, reflecting the market's confidence in its ability to generate returns above its cost of equity. When a bank trades below book value, like Citigroup did for years after the 2008 crisis (trading at roughly 0.5–0.7× book value from 2009–2018), it signals the market doubts the bank's ability to earn adequate returns on its assets.
Use Tangible Book Value for more accuracy: Subtract goodwill and intangible assets from book value to get tangible book value. This removes often-inflated acquisition premiums and gives a more conservative net asset figure. For banks and insurers, tangible book value per share is the gold standard metric.
Track book value growth over time: A company growing book value per share at 15%+ annually is compounding wealth effectively. Compare this to the stock's total return — if the stock significantly outpaces book value growth, it may be getting overvalued relative to the underlying business.
Combine with Return on Equity (ROE): A stock trading at 1.0× book value with 20% ROE is far more attractive than one at 1.0× book value with 5% ROE. The higher the ROE, the more book value grows each year, and the more the company is worth above its accounting value.
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Book value represents the theoretical liquidation value — what shareholders would receive if the company sold all assets and paid all liabilities. It's a baseline for valuation: if a stock trades below book value, you're buying assets at a discount. Value investors like Benjamin Graham built entire strategies around buying stocks trading below book value.
Can book value be negative?
Yes. A negative book value means liabilities exceed assets — the company technically owes more than it owns. This is common for airlines (which lease most planes) and financial companies during crises. Negative book value doesn't necessarily mean bankruptcy, but it's a red flag that requires careful analysis.
What's the difference between book value and market value?
Book value is an accounting measure based on historical costs. Market value is what investors currently believe the company is worth (share price × shares outstanding). For most companies, market value exceeds book value because the market prices in future earnings, brand value, and growth potential. The ratio of market value to book value is the PB ratio.