Priceline.com Price / Book Value:

About Price to Book Ratio

The price to book value is a financial ratio used to compare a company's book value to its current market price. Book value is an accounting term denoting the portion of the company held by the shareholders at accounting value (not market value). In other words, book value is the company's total tangible assets less its total liabilities.

The ratio has two calculation methods. In the first way, the company's market capitalization is divided by the company's total book value from its balance sheet. The second way, using per-share values, is to divide the company's current share price by the book value per share. In general, a low price to book value indicates that a stock is undervalued and thus more desirable.

In theory, if you purchased stock with a price to book value less than 1 and the company immediately went bankrupt, you would gain money on your investment. In reality, this may not be true since there are times when liquidation value, or the price at which a company's assets can be sold, is less than the book value of those assets.
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