Many people ask about what ROA is and why it’s important to pay attention to. Honestly, if you don’t know what ROA is, you’re investing blindly!

It’s common to see people buy stocks just because of the company’s name or because someone said it will skyrocket, only to see the price crash afterward. The problem is, they’ve never looked at the numbers even once.

ROA stands for Return on Assets, which tells you how well a company manages its assets. It shows how effectively it uses available capital to generate profits. The higher the ROA, the more skilled the management, and the less waste there is.

The formula is simple: (Net Profit ÷ Total Assets) × 100 = ROA. That’s the percentage you need to find. With this, you’ll know how many baht of profit a company can generate from every 100 baht of assets.

Have you ever seen Company A with a huge factory and full of machinery, but only a small profit at the bottom line? That indicates poor management skills. Meanwhile, Company B has a small office but makes huge profits. That’s the key difference that ROA is an important indicator of.

Now, want to know what ROA is considered good? Generally, if ROA is over 5%, it’s considered acceptable. If it’s 10% or higher, it’s clearly a top-tier company. However, remember that different industries have different standards.

For software or technology companies (Asset-Light), ROA should be over 15% to be attractive. But for power plants or airlines (Asset-Heavy), a ROA of 5-7% is already good because they require large investments.

The important thing is not to compare ROA across industries. Comparing a software company to a hospital doesn’t make sense. You should only compare companies within the same industry.

Talking about Apple and Tesla: Apple designs in California but manufactures in Asia, so it doesn’t carry heavy assets. As a result, Apple’s ROA usually stays around 25-30%. Tesla, on the other hand, has factories worldwide, so their ROA fluctuates between 5-15%, depending on market conditions.

Another related metric is ROE (Return on Equity), but don’t confuse it with ROA. ROE measures from shareholders’ equity only. The problem is, ROE can be distorted by taking on a lot of debt, making it look artificially high. ROA, however, can’t be fooled.

When using ROA to select stocks, focus on three points: if ROA is high and stable, it indicates strong business fundamentals. If ROA is steadily increasing each year, that’s a sign of growth. If ROA is declining, run away—it means management is worsening or the business is facing problems.

For CFD traders, you can incorporate ROA data into your decision-making. For example, if you see a company’s ROA decreasing continuously but the stock price isn’t falling due to momentum, you can wait for a technical signal and then open a short position. This combines fundamental analysis with technical analysis, used by professionals.

A limitation of ROA is that it shouldn’t be used to evaluate banks because their balance sheet structures are different. Financial companies often have very low ROA, but that doesn’t mean they’re bad—it's just the nature of their business.

In summary, ROA is a key indicator that helps you understand whether a company’s management is skilled or not. Don’t just look at the company name, technical charts, or follow popular opinions. If you’re serious about investing, you need to understand ROA deeply, because it’s a fundamental tool to help you avoid losing a lot of money!