The arrival of Industry 4.0 has brought to the forefront the demand for changes in the structure of the economy measured by GDP. This trend is being picked up more quickly by the stock market, which also signals how and where the economy should go in the future. The arrival of the Covid 19 pandemic also showed the need for restructuring of economies with the use of inteneration, digitization and robotization, which will bring stability to the economy even in times of negative development or stronger economic growth. These changes have been implemented in the last decade in several, especially developed, countries of the world. The aim of this paper is to show the extent to which countries with a small economic dimension within the EU, such as Finland, Ireland, Austria and the Czech Republic, are able to implement these processes. The aim is to quantify in detail the sectoral structure of GDP and the relevant stock indices, especially with regard to the current situation caused by the Covid-19 pandemic.