The article looks at how some countries joining the European Union are connected to the EU and US stock markets. They found that these countries don't have a long-term relationship with the EU and US markets. However, there is a short-term connection where the European and US markets influence the Croatian stock market, and the Turkish market affects the Bulgarian stock market. This means that even though these countries are in the process of joining the EU, their stock markets still offer good opportunities for diversification for investors from Europe and the US.