Which entity is responsible for the regulation of securities in Canada?

The Canadian Securities Administrators (CSA) is the correct entity responsible for the regulation of securities in Canada. The CSA is an umbrella organization of Canada's provincial and territorial securities regulators, which work together to coordinate and harmonize regulation across the country. This organization sets regulatory policies, enforces compliance, and strives for uniformity in securities regulation among the provinces and territories, ensuring that the market operates in a fair and efficient manner.

The Bank of Canada primarily focuses on monetary policy and financial system stability, rather than directly regulating securities markets. The Investment Industry Regulatory Organization of Canada (IIROC) regulates investment firms and trading activities in the markets, but it operates under the broader framework established by the CSA. Lastly, the Toronto Stock Exchange is a marketplace for trading securities and does not have regulatory authority over securities transactions. Thus, the CSA is entrusted with overseeing and regulating securities to protect investors and maintain orderly markets.