The Brussels Stock Exchange, abbreviated to BSE, was founded in Brussels, Belgium, by decree of Napoleon in 1801. In 2002, the BSE merged with the Amsterdam, Lisbon and Paris stock exchanges into Euronext, renaming the BSE Euronext Brussels. The most well known stock market index on the BSE is the BEL20.

Brussels, officially the Brussels-Capital Region, is a region of Belgium comprising 19 municipalities, including the City of Brussels, which is the capital of Belgium. The Brussels-Capital Region is located in the central portion of the country and is a part of both the French Community of Belgium and the Flemish Community, but is separate from the Flemish Region and the Walloon Region, located less than 4 kilometres (2.5 mi) to the south. Historically Dutch-speaking, Brussels saw a language shift to French from the late 19th century. Nowadays, the Brussels-Capital Region is officially bilingual in French and Dutch, although French is the majority language and lingua franca. Brussels is also increasingly becoming multilingual. English is spoken widely and many migrants and expatriates speak other languages as well.