How Can Global Stock Markets Be So Expensive?

The price increases in global stock markets have attracted the attention of some investors. However, the real reasons behind these increases require a deeper analysis. Particularly, the price increases occurring in the United States have drawn the attention of some analysts. So, how can the price increases in global stock markets become so expensive?
Part of the price increases is linked to investor expectations. Investors tend to invest more in exchange for higher prices. However, some of these increases are also related to companies' actual profits. Some companies promise high profits to investors, but the reality of these profits is being questioned. So, are the price increases in global stock markets related to real profits?
The price increases in global stock markets invite investors to be cautious. So, what are the real reasons behind these increases? Carefully selecting investment instruments will ensure investors' success. The price increases in global stock markets have attracted the attention of some investors. However, the real reasons behind these increases require a deeper analysis.