The IDX Composite index, also known as the Jakarta Stock Exchange index, tracks the performance of all stocks traded on the Indonesia Stock Exchange (IDX). The number of companies listed on the exchange is always growing, and so is the number of the index components, which has reached 864 in 2023. Watching IDX Composite lets investors assess the performance of one of the fastest growing market in Asia, so maybe it's time to start following this index before it's mainstream?