### Question
How is the term investment-grade rating defined?


### Answer
The term **investment-grade rating** is defined in *23 U.S.C. § 181* as the following:

> a rating category of BBB minus, Baa3, or higher assigned by a rating agency to project obligations offered into the capital markets

#### Citation:
  - *23 U.S.C. § 181*
  - Heading: **CHAPTER 1-FEDERAL-AID HIGHWAYS > SUBCHAPTER II-INFRASTRUCTURE FINANCE**

