Whenever we open any business channel, we see a bar at the bottom which shows the current market price (last traded price) of stock and typically on the bottom right corner, there is a number which shows the current value of an index. Like in the snapshot from Fox business, it is showing Dow Jones Industrial Average (Dow Jones or simply Dow) currently priced at 26503.77. In this snapshot, there are three indices shown at four different places which lead us to ask questions such as what is an index? What is its significance? Why is it so important? Fox Business Channel snapshot An index is an indicator or a measure of something. In the world of investing, it is a hypothetical portfolio of stocks and bonds designed to represent the market. When people say the market is moving up and down, they are referencing the movement of the index. Some of the most popular stock market indexes are: Dow Jones Industrial Average (US) S&P 500 (US) NASDAQ (National Association of Sec...