Book value is an accounting value of a company. It relates to stock price in that it includes tangible assets minus liabilities. It may or may not include intangibles such as good will. What book value does not address is the strength of the company’s product line, the efficiency of it research, development, and ability to bring salable products to market. Book value does not assess the strength of a company’s management or its general promise for the future. Book value may reveal property, cash assets, and other matters not reflected in the current stock price. These items then represent a greater intrinsic stock value than reflected in the stock price and a margin of safety often sought after in long term investing. Knowing book value is essential to fundamental analysis of stocks.