The MERVAL Index tracks the performance of leading Argentinian companies listed on the Buenos Aires Stock Exchange (23 companies as of 2023). It was launched in 1986 with a base value of $0.01. MERVAL is a price-weighted index, and as such it's calculated as the market value of a portfolio of stocks selected according to their price, market share, and number of transactions. Investors working with the Argentinian stocks pay close attention to MERVAL as a powerful tool to keep track of where the Argentina stock market is heading.