Nasdaq composite index is a barometer representing the changes in market value of various industrial categories. Therefore, the Nasdaq Composite Index is more comprehensive than the Standard & Poor's 5 Index and the Dow Jones Industrial Index (it only includes 3 famous industrial and commercial companies, 2 transportation companies and 15 public utility companies). The Nasdaq Composite Index includes more than 5, companies, more than any other single stock market. Because it has such a broad foundation, it has become one of the most influential stock market indexes.