Book Value is defined as its acquisition cost minus its total amount of accumulated depreciation. The Book Value has a few main uses:
It is the total value of the company's assets that shareholders would theoretically receive if a company were liquidated.
By being compared to the company's market value, the book value can indicate whether a stock is under- or overpriced.
In personal finance, the book value of an investment is the price paid for a security or debt investment. When a stock is sold, the selling price less the book value is the capital gain (or loss) from the investment.