<Tr> <Th> Designated NHL </Th> <Td> June 2, 1978 </Td> </Tr> <Tr> <Th> Designated NYCL </Th> <Td> July 9, 1985 </Td> </Tr> <P> The New York Stock Exchange (abbreviated as NYSE, and nicknamed "The Big Board"), is an American stock exchange located at 11 Wall Street, Lower Manhattan, New York City, New York . It is by far the world's largest stock exchange by market capitalization of its listed companies at US $21.3 trillion as of June 2017 . The average daily trading value was approximately US $169 billion in 2013 . The NYSE trading floor is located at 11 Wall Street and is composed of 21 rooms used for the facilitation of trading . A fifth trading room, located at 30 Broad Street, was closed in February 2007 . The main building and the 11 Wall Street building were designated National Historic Landmarks in 1978 . </P> <P> The NYSE is owned by Intercontinental Exchange, an American holding company that it also lists (NYSE: ICE). Previously, it was part of NYSE Euronext (NYX), which was formed by the NYSE's 2007 merger with Euronext . </P>

Where are the head quarters of the national stock exchange situated