I just reviewed something that many new traders overlook: truly understanding the different types of shares is the foundation to avoid messing up in the market.

Look, when we talk about shares, not everything is the same. They are fractions of a company's equity, and depending on which ones you hold in your portfolio, your rights, benefits, and risks will change completely. Basically, when you buy a share, you become a partner in that company, even if it's just a small part. But here’s the important part: not all shares give you the same privileges.

The most relevant types of shares on the stock market are three, and I’ll explain because the difference is crucial. Common or ordinary shares are the classic ones, the ones you see everywhere. With these, you have voting rights at the meetings, which means if you own enough shares, your voice counts. You also receive dividends proportional to what you own. The downside is that volatility is high, they can be hard to sell quickly, and if the company goes bankrupt, your investment goes to zero.

Then there are preferred shares, which are a different game. Here, you sacrifice voting rights but gain something more valuable: guaranteed fixed dividends. It doesn’t matter if the company is in crisis, you receive your payment. And if there’s bankruptcy, you recover before common shareholders. It’s ideal if you’re looking for passive income without having to monitor business decisions. Liquidity is better, you can sell more easily.

Privileged shares are like the best of both worlds: you have voting rights and economic benefits of preferred shares, but they require special approval.

Beyond these three, there are other types of shares worth knowing. There are registered shares, which are in your specific name, and bearer shares, where whoever holds the paper is the owner. Also private shares that don’t trade on the stock exchange, listed shares that do, redeemable shares that mature after a certain time, and short-selling shares used to bet on declines.

The reality is that if you want to trade listed shares, it’s much easier. You need a broker and that’s it—you buy and sell without paperwork. But if you go for traditional common shares, prepare for documentation, contracts, and legal procedures. And proprietary shares are only for the issuing company.

Now, why does this matter in practice? Because the type of share you choose determines your strategy. If you’re looking for exponential gains long-term, go with common shares. If you prefer predictable income, preferred shares. And if you want to speculate on quick drops, short-selling shares, though that’s riskier.

What I’ve seen is that many beginners don’t distinguish between types of shares and end up with positions that don’t match what they were looking for. Some types of shares offer immediate liquidity, others require months of trading. Some give you decision-making power, others only money. The key is to know exactly what you need before investing capital.

If your plan is to invest in listed shares, there are very accessible options today. But if it’s something more serious, you need to understand well the types of shares that exist and what each one entails. The difference between choosing wisely and choosing poorly can be your capital.