What it is:
How it works (Example):
Book value is calculated by taking a company's physical assets (including land, buildings, computers, etc.) and subtracting out intangible assets (such as patents)and liabilities -- including preferred stock, debt, and accounts payable. The value left after this calculation represents what the company is intrinsically worth.
Thus, book value is calculated:
Book value = total assets - intangible assets - liabilities
Why it Matters:
Since book value represents the intrinsic net worth of a company, it is a helpful tool for investors wanting to determine if a company is underpriced or overpriced, which could indicate a potential time to buy or sell. For instance, value investors search for companies trading for prices at or below book value (indicating a price-to-book ratio of less than 1.0), which implies the shares are selling for less than the company's actual worth.