Final answer:
Rule 5130 applies to common stock because it is an equity security. The rule ensures fair access to new equity issues and does not apply to debt securities like bonds.
Step-by-step explanation:
The provisions of Rule 5130 apply to the distribution of new issue securities, specifically focusing on equity securities such as common stock. Rule 5130 is designed to prevent certain practices in the allocation and distribution of new equity issues, ensuring fair access to trading and investment opportunities.
When considering the types of securities, common and preferred stocks are equity securities, whereas municipal bonds and corporate bonds are debt securities. Therefore, the correct answer is a) Common stock.