The largest stock exchange in Canada, the Toronto Stock Exchange is the main Canadian exchange for trading large-cap equity securities. In 1997, the exchange moved from traditional floor trading to electronic trading. In 2000, it demutualized to become a for-profit corporation. It is a leader in the oil, gas, and mining industries, with more such companies trading on it than on any other exchange in the world. The Toronto Stock Exchange is also home to all of Canada’s “Big Five,” which are what? Discuss