The CAC 40 Index is a benchmark French stock market index. It tracks the performance of 40 companies selected among the top 100 market capitalization and the most active listed equities traded on the NYSE Euronext Paris. The CAC 40 Index is free floating, modified capitalization-weighted index. The Index has a base value of 100 as of December 31, 1987.. This page provides - France Stock Market (CAC 40) - actual values, historical data, forecast, chart, statistics, economic calendar and news. France CAC 40 Stock Market Index - actual data, historical chart and calendar of releases - was last updated on September of 2018.