Investment in the stock markets has historically been very profitable. During the twentieth century in almost any decade buying equities proved to be a good strategy to preserve purchasing power. However, very few investors in that period will have obtained exactly the results that the market averages show.
When we talk about the evolution of the stock market and markets in general, we almost always refer to some index. This index is usually made up of a number of companies and aims to represent an important segment of the market. For example, the S&P 500, one of the most followed indices in the world, represents the equity of large companies in the United States. Its evolution is closely linked to the evolution of the US economy and companies.
Today we live in a very globalized world, and financial markets are increasingly interconnected. In the same way, more and more investors are observing global indices that seek to reflect the evolution of the economy worldwide.
