The S&P/TSX Composite Index is the benchmark Canadian stock market index representing roughly 70% of the total market capitalization on the Toronto Stock Exchange. Having replaced the TSE 300 Composite Index on May 1, 2002, as of September 20, 2021 the S&P/TSX Composite Index comprises 237 of the 3,451 companies listed on the TSX. The index reached an all-time closing high of 22,185.25 on April 1, 2024 and an intraday record high of 22,220.91 on March 28, 2024. Wikipedia