Recently, when discussing stock selection, many beginners are asking one question: How should we understand what book value per share means? Actually, this indicator is more practical than you might think, but it’s also easy to make mistakes in its application.

Simply put, book value per share is the value of all assets minus liabilities, divided equally among each share. From another perspective, it reflects how much assets you, as a shareholder, actually own on the company's books. The calculation isn’t complicated: just divide shareholders’ equity by the number of outstanding shares, or subtract total liabilities from total assets and then divide by the number of outstanding shares. For example, if a company has shareholders’ equity of 1.5 billion yuan and 1 billion shares outstanding, the book value per share is 1.5 yuan.

Here’s a special reminder: a high book value per share doesn’t necessarily mean the stock price will go up. Many people tend to confuse this point. The stock price reflects the market’s expectation of the company's future earning ability, while book value only reflects past accumulated accounting assets. Sometimes, the stock price can be far above the book value because investors are willing to pay a premium for growth potential; other times, the stock price is below book value, but that doesn’t necessarily mean it’s a bargain—it’s important to check whether the company is in loss or if the industry is in decline.

Regarding application, the most useful way to use book value per share is in conjunction with the Price-to-Book Ratio (PBR). PBR equals the market value of the stock divided by the book value per share. The lower the number, the theoretically cheaper the stock, but this is only a preliminary judgment. The real approach is to compare companies within the same industry and similar business models, and then consider profit trends and economic conditions before making decisions.

I’ve noticed an interesting phenomenon: for asset-intensive industries like manufacturing, finance, and shipping, book value per share is indeed quite valuable because their asset structures are clear, and changes in book value can reflect actual operational conditions. But for tech companies and software firms, it’s different. Companies like NVIDIA and Microsoft derive their main value from technology, branding, and R&D capabilities, not from book assets, so relying solely on book value can be misleading. That’s why you shouldn’t just chase stocks with the highest book value—doing so might cause you to miss out on growth opportunities.

In actual stock picking, I usually look at book value along with several other indicators. For example, TSMC’s PBR is about 4.29, Formosa Plastics around 2.45, and Chunghwa Telecom about 3.29—these are relatively reasonable levels. In the U.S., JPMorgan’s PBR is about 1.94, Ford around 1.19, and General Electric about 0.70. Stocks that seem cheap aren’t always opportunities; you also need to consider EPS (earnings per share), ROE (return on equity), and industry outlook.

A key point often overlooked: book value per share and EPS are two different things. Book value shows how many assets a company has, while EPS shows how much profit it makes. A company with many assets but no profit indicates assets aren’t effectively converted into earnings; conversely, an asset-light but highly efficient company may have a low book value but strong EPS. This mode is very popular nowadays.

Checking book value per share is very simple. You can find it directly on trading platforms, stock websites, or broker systems. If you want to calculate it yourself, just divide shareholders’ equity from the financial report by the number of shares outstanding. The key is to remember that book value per share is just the starting point for understanding a stock’s value; actual investment decisions should consider PBR, EPS, ROE, and industry characteristics comprehensively. Pursuing high book value alone can lead to losses.