Recently, someone asked me in a conversation about investments, and I realized that many people don't truly understand the difference between common and preferred shares. It's more common than you think to confuse these two types of assets, so I decided to delve a little deeper into the topic.

The first thing to know is that not all shares issued by a company grant the same rights. Companies can issue different types, each with specific characteristics. The two main types are common shares and preferred shares, and honestly, understanding how they work is crucial if you want to invest smartly.

Common shares are the most typical type you'll see in the market. They give you voting rights at shareholder meetings, meaning you have a voice in important company decisions. The dividends you receive will depend on how well the company performs, so they can vary quite a bit. The tricky part is that if the company goes bankrupt, you're among the last to receive anything back. But in return, you have much greater growth potential, especially if the company grows.

Preferred shares work differently. They generally do not give you voting rights, but they offer something more valuable for certain investors: more stable and predictable dividends. In the event of bankruptcy, you have priority over common shareholders to recover your investment. There are variants like cumulative preferred shares, where unpaid dividends accumulate for later payment, or convertible preferred shares, which you can convert into common shares under certain conditions.

So, which one to choose? It depends a lot on your investor profile. If you're young with a long-term horizon and tolerate volatility, common shares probably suit you better. You're looking for long-term growth and are willing to withstand market fluctuations. On the other hand, if you're closer to retirement or simply prefer regular, predictable income, preferred shares are your ally. Many conservative investors choose them precisely for that stability.

An interesting fact: if you compare the S&P U.S. Preferred Stock Index with the S&P 500 over the past few years, you can clearly see the differences in behavior. The preferred stock index fell about 18% over five years, while the S&P 500 rose nearly 58%. This shows how they react differently to changes in interest rates and economic conditions.

If you want to start investing in common and preferred shares, the process is relatively simple. First, find a regulated and trustworthy broker. Open your account by filling in the necessary details. Then, carefully analyze the company you want to invest in—review its numbers, sector, and competitive position. When you're ready, place your order, choosing either the current market price or setting a specific price. Some brokers also offer CFDs on these shares if you prefer not to hold them directly in your portfolio.

My personal recommendation is not to put all your eggs in one basket. Mix common and preferred shares according to your risk tolerance. That helps you reduce volatility while maintaining growth potential. And don't forget to review your portfolio periodically; the market changes, and your strategy should adapt.

In summary, common and preferred shares serve different purposes in an investment portfolio. Common shares are for those seeking growth and willing to take risks. Preferred shares are for those valuing stability and predictable income. Knowing this difference is the first step toward making smarter investment decisions.