Final answer:
The bond rating Baa3 is not a High Yield Rating; it is the lowest investment-grade bond rating. Ratings such as Ba1, B1, and Caa1 are considered high yield, offering higher interest due to higher risk.
Step-by-step explanation:
The bond rating that is NOT considered a High Yield Rating is Baa3. This rating is the lowest investment-grade bond rating, just above non-investment grade or 'junk' bonds. High yield ratings, also known as non-investment grade or junk bonds, typically offer higher yields due to potentially higher risks and include ratings from Ba1 to below. Therefore, Baa3 remains within the investment-grade category, whereas ratings such as Ba1, B1, and Caa1 fall into the high yield category because they are associated with higher borrower risk compared to the federal government and safe corporate borrowers with AAA ratings.