The All Share Price Index provides investors with an overall view of the performance of all the stocks listed on a particular exchange. However, depending on the region and the stock exchange, there may be different synonyms used for this stock market index. In the United States, the equivalent is the Dow Jones Industrial Average, which measures the performance of 30 large publicly traded companies. In the United Kingdom, the FTSE All-Share Index tracks the performance of over 600 companies listed on the London Stock Exchange. Synonyms for the All Share Price Index may also include the S&P 500 in the US or the Nikkei 225 in Japan, which both track large numbers of companies on their respective exchanges.