### Question
How does the law define investment-grade rating?


### Answer
Under *23 U.S.C. § 601*, **investment-grade rating** is defined as:

> a rating of BBB minus, Baa3, bbb minus, BBB (low), or higher assigned by a rating agency to project obligations

#### Citation:
  - *23 U.S.C. § 601*
  - Heading: **CHAPTER 6-INFRASTRUCTURE FINANCE**

