AEX (AEX Index)

The AEX index, formally the Amsterdam Exchange Index (ticker: AEX), is the flagship free-float market-capitalization-weighted benchmark of Euronext Amsterdam in the Netherlands, tracking the exchange’s most-traded Dutch companies across sectors such as financials, consumer staples, technology, energy and healthcare.​ It currently comprises the 25 largest and most liquid Dutch listings, but - following a methodology change announced on 11 March 2025 - the basket will expand to the top 30 companies after the close of trading on 19 September 2025, a move designed to boost diversification and better reflect the breadth of the Dutch market.​ Because of its broad sector coverage and weighting approach, the AEX is widely regarded as the primary barometer of Dutch equity performance and a reliable proxy for economic and market trends in the Netherlands.​