Index

An index is a tool that helps locate or measure information quickly. In finance, it's a collection of selected stocks or assets meant to represent a specific market or sector, like the S&P 500 representing large U.S. companies. In books, an index lists topics with page numbers to find information easily. Essentially, an index provides a structured way to track, compare, or quickly access data, saving time and enhancing understanding of a broader system or collection.