The corporate certificate issued to an investor who has loaned money to a corporation or government is called a bond. Here's why:
1. Bonds are debt instruments that represent a loan made by an investor to a borrower (which can be a corporation or a government entity).
2. When an investor buys a bond, they are essentially lending money to the issuer (corporation or government) in exchange for periodic interest payments and the return of the bond's face value at maturity.
3. Bonds come with a predetermined interest rate and maturity date, offering a fixed income stream to the investor.
4. Unlike stocks, which represent ownership in a company, bonds represent a form of debt owed by the issuer to the bondholder.
Therefore, in the context of the question, the correct answer is (D) bond, as it accurately describes the corporate certificate issued to an investor who has provided a loan to a corporation or government.