A Comprehensive Guide to the AIM 100 Index: Opportunities, Risks, and Investor Insights
What Is the AIM 100 Index? The AIM 100 Index — officially known as the FTSE AIM UK 100 — is a stock market index that tracks the performance of the 100 largest companies (by market capitalisation) with a primary listing on the Alternative Investment Market (AIM), a sub-market of the London Stock Exchange. These companies can be UK-based or international, but they must meet certain standards for free float and liquidity. The index is maintained by FTSE Russell and is adjusted periodically to reflect changes in company sizes, listings, and delistings. It offers investors a way to gauge how well the mid- to large-sized AIM companies are performing, compared to the broader UK markets or smaller AIM-only cohorts. Key Features and Structure Quarterly Review: The index is reviewed four times a year — typically at the end of February, May, August, and November. During these reviews, companies may be added or removed depending on their market capitalisation and whether they meet ot...