Question

what do you mean by index​

Answer 1

Explanation:

An index is an indicator or measure of something. In finance, it typically refers to a statistical measure of change in a securities market. In the case of financial markets, stock and bond market indexes consist of a hypothetical portfolio of securities representing a particular market or a segment of it.

Answer 2

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A list in order from A to Z, usually at the end of a book, of the names or subjects that are referred to in the book is called as “Index“.