a few words
Indexes or indices as they are differently named, are not just trading assets, they are used to measure the performance of a group of stocks, an industrial sector or the economy as overall. There is no need to check on individual stocks to know how the technology sector is performing, index report quotes will show how an economy is doing. There is no physical asset to exchange while dealing with indices, so they are mostly traded through derivatives like CFDs.
What are the key factors that influence indices price movement?
The most popular Indexes