What Book Value Per Share Means
Book value per share (BVPS) measures the net asset value attributable to each outstanding share of a company. It is calculated by dividing total shareholders' equity minus preferred equity by the number of common shares outstanding. Investors use BVPS to assess whether a stock is undervalued or overvalued relative to its accounting book value on the balance sheet.
The formula for book value per share is straightforward: BVPS = (Total Shareholders' Equity - Preferred Equity) / Weighted Average Common Shares Outstanding. This metric is widely reported in financial statements and used in valuation models. A higher BVPS compared to the market price often signals a potential discount, while a lower BVPS can indicate overvaluation or asset impairment.
Step-by-Step Calculation Process
Finding the Right Balance Sheet Data
Start by locating the company's most recent quarterly or annual balance sheet from its 10-Q or 10-K filing with the SEC. Identify total shareholders' equity, which includes common stock, additional paid-in capital, retained earnings, and accumulated other comprehensive income. Subtract any preferred equity to isolate the equity available to common shareholders.
Next, find the weighted average number of common shares outstanding, which is typically reported in the income statement or the notes to the financial statements. Divide the adjusted equity figure by this share count to obtain the book value per share. For example, if a company reports total shareholders' equity of $15 billion, preferred equity of $2 billion, and 1 billion weighted average common shares, its BVPS would be $13.
Using Market Data for Comparison
Once you have the BVPS, compare it to the current market price per share. The price-to-book ratio, calculated as market price divided by BVPS, helps investors evaluate valuation. A price-to-book ratio below 1.0 may suggest the stock trades at a discount to its book value, while a ratio above 1.0 suggests a premium.
Real-World Examples and Latest Data
Tesla's Book Value Per Share
Tesla reports its book value per share in its quarterly earnings releases and SEC filings. As of its latest available public filing, Tesla's book value per share reflects the company's substantial retained earnings and equity base built from years of vehicle deliveries and energy storage deployments. Investors can track this figure on Tesla's investor relations page and compare it to the stock's market price to gauge relative valuation.
SpaceX, while not publicly traded, provides a reference point for private company book value calculations. Private market valuations often incorporate book value alongside revenue multiples and growth projections. For public companies, the most reliable source for BVPS data remains the SEC's EDGAR database, where audited financial statements are filed quarterly and annually.
