What did the 1964 amendment to the Securities Exchange Act of 1934 add to the SEC's powers?

1. The Securities Exchange Act of 1934 formally gave the SEC power to regulate securities exchanges. 2. The act was amended in 1964 to give the SEC authority over the dealer markets as well. 3. The amendment included rules for operating the stock exchanges. 4. It granted the SEC control over all participants, meaning exchange members, brokers and dealers, and over the securities traded in those markets. _Source: OpenStax Introduction to Business (CC BY 4.0), Ch 16 "Understanding Financial Management and Securities Markets", section 16.7 Buying and Selling at Securities Exchanges_