The MERVAL is a major stock market index which tracks the performance of large companies based in Argentina. It is a basket weighted index. The market value of a stock portfolio is selected according to the market share in the Buenos Aires Stock Exchange, number of transactions and quotation price. The index has a base value of $0.01 as of June 30, 1986.. This page provides - Argentina Stock Market (MERVAL) - actual values, historical data, forecast, chart, statistics, economic calendar and news. Argentina Stock Market (MERVAL) - actual data, historical chart and calendar of releases - was last updated on May of 2018.