As is the case with every major stock exchange, the Toronto Stock Exchange has a benchmark index. In the case of the Toronto Stock Exchange that is the TSX Composite Index. This index gives investors exposure to a basket of stocks representing approximately 250 companies that comprise about 70% of the market capitalization of the exchange. The index is rebalanced quarterly in March, June, September, and December.
The TSX Index replaced the TSE 300 Index which was launched in 1975 with a base level of 1,000. The index closed at an all-time high of 21,768.53 on November 12, 2021, and the intraday record high of 21,796.16 was made just a few days later on November 16, 2021.