The S&P/TSX Composite Index is the benchmark Canadian index, representing roughly 70% of the total market capitalization on the Toronto Stock Exchange (TSX) with about 250 companies included in it. The Toronto Stock Exchange is made up of over 1,500 companies. It replaces the earlier TSE 300 index.On January 23, 2020, the S&P/TSX Composite Index reached an all-time closing high of 17,621.31. Standard & Poor's | Americas S&P Dow Jones Indices is the world's largest, global resource for index-based concepts, data and research. Home to iconic financial market indicators, such as the S&P 500 and the Dow Jones Industrial Average, S&P Dow Jones Indices has over 120 years of experience constructing innovative and transparent solutions that fulfill the needs of institutional and retail investors.