Anyone any idea of Wall Street English or some other similar institutions?

Wall Street
1. A street in lower Manhattan that is the original home of the New York Stock Exchange. The street is the historic headquarters of the largest U.S. brokerages and investment banks. Many have since relocated to other areas of Manhattan and the United States. Wall Street was named after the wooden wall Dutch colonists built in this area in 1653 to defend themselves from the British and Native Americans.

2. The collective name for the financial and investment community, which includes stock exchanges and large banks, brokerages, securities and underwriting firms, and big businesses. Some people believe that the interests of these big firms contrast those of smaller businesses, or "Main Street".
网站里有很多，不一一列举了