Why do people refer to the global finance industry as "Wall Street"? Wall Street, in Lower Manhattan, New York City, is one of the most famous streets in the world.
Named after a defensive wall built around a Dutch settlement in the 17th century, it is believed it did not become known as a trading centre until the end of the 18th century with the beginnings of the New York Stock Exchange.
In the US especially, you might hear the phrase "what's good for Wall Street is bad for Main Street". In this context, Main Street refers to individual investors, employees and the overall economy.
Wall Street is also a film from the late '80s starring Charlie Sheen!