I just noticed that many people still do not understand what eps really is and how to use it, even though it is a very important indicator for stock analysis.

eps stands for Earnings Per Share, which is a financial ratio that compares a company's net profit (after expenses and taxes) with the number of outstanding shares. Once you understand this, you'll realize why eps is crucial in assessing how well a company is actually making a profit.

Calculating it is not as difficult as you might think. eps is simply the result of dividing net profit by the total number of shares. For example, Company AA has a net profit of 1 million baht and 1,000 shares, so its eps is 1,000 baht. Company BB has the same profit but 2,000 shares, so its eps drops to 500 baht. Even with the same profit, the different number of shares causes eps to differ.

In reality, eps is used to calculate many other indicators, such as the PE ratio (market price per earnings per share), which helps determine whether a stock is undervalued or overvalued, or EPS Growth, which shows the growth rate of earnings per share. If eps growth is positive, it indicates the company is growing; if negative, it shows a decline.

The number of shares is very important. Sometimes, a company may buy back its own shares (stock buyback), which reduces the number of shares outstanding, leading to an increase in eps even if profits haven't actually increased. This is why eps should be considered together with other indicators.

Investors should study the eps of the companies they are interested in and compare it with others in the same industry, or look at the trend of eps over several years. If eps steadily increases, it indicates the company is efficient at generating profits. However, it’s also necessary to verify whether the increase is due to genuine profit growth or cost reductions.

But be cautious: a high eps does not necessarily mean the stock is good. eps does not account for risk, and eps data is historical, not predictive of the future. That’s why investors should use eps alongside other metrics such as net profit, market value, and ROI for a more comprehensive analysis.

In summary, eps is a useful tool for stock analysis, but it should not be used alone. Look at the bigger picture—analyze profit structure, risk, and compare with competitors—to make confident and suitable investment decisions aligned with your goals.