What are the four main types of debt securities?
Common types of debt securities include commercial paper, corporate bonds, government bonds, municipal bonds, and treasury bills/bonds.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: What are the four main types of debt securities?
### Input: 
### Response: Common types of debt securities include commercial paper, corporate bonds, government bonds, municipal bonds, and treasury bills/bonds.