The Euro is the official currency of the European Union, and is the world's second-largest reserve currency after the US dollar. The Euro is used by investors and financial markets to facilitate investments, trading and hedging activities in the Eurozone. The Euro is a liquid and stable currency, which makes it attractive to foreign investors looking to invest in the Eurozone. It is also used to settle cross-border transactions and to hedge against currency fluctuations. The Eurozone is the largest economic bloc in the world, and the Euro is seen as a reliable currency to invest in. The Euro is also used to measure the relative performance of different markets, allowing investors to compare and measure investment opportunities.