FTSE100 is the most influential index of the whole European Union. It includes simultaneously 100 leading companies of the United Kingdom with the highest level of capitalization. The FTSE100 index includes only those companies that are officially registered on the London Stock Exchange. In addition, they are subject to a number of additional requirements: Their value must be expressed in GBP or EUR; The company must undergo validation with a strong binding to a specific country; Their shares should have high liquidity indicators and be in free circulation.