CAC 40 (index)
The CAC 40 is the benchmark index of the Paris Bourse (stock exchange), comprising the 40 largest and most actively traded stocks. Using a base value of 1,000 at December 31, 1987, it is weighted by the stock market capitalization of each of its constituent companies. The Conseil Scientifique des Bourses de Valeurs decides which companies to include in the index, based on a number of criteria, including liquidity and economic weight of the sector in which the companies operate. CAC stands for “Cotation Assistée en Continu”.