Netherlands Stock Market (AEX) The AEX Index is a major stock market index which tracks the performance of the leading stocks traded on the Amsterdam Exchange. It is a free-float adjusted market capitalization weighted index. The AEX Index has a base value of 538.36 as of January 4, 1999 after conversion to Euro. Stock Market Index for Netherlands from SIX Financial Information for the SIX Financial Information release. This page provides forecast and historical data, charts, statistics, news and updates for Netherlands Stock Market Index.