NYSE Stock Index
The New York Stock Exchange (NYSE) is a stock exchange located at 11 Wall Street in lower Manhattan, New York City, USA. It is the world's largest stock exchange.
In the mid-1960s, the NYSE Composite Index (NYSE: NYA) was created, with a base value of 50 points equal to the 1965 yearly close. This was done to reflect the value of all stocks trading at the exchange instead of just the 30 stocks included in the Dow Index.