A calculated number that tracks the combined performance of a group of shares, such as the S&P 500 or the DAX. You cannot buy an index directly, but funds, futures and CFDs can follow it.
Lesson
Stock index
A calculated number that tracks the combined performance of a group of shares, such as the S&P 500 or the DAX. You cannot buy an index directly, but funds, futures and CFDs can follow it.