A bond rating is a letter-based credit scoring scheme used to judge the quality and creditworthiness of a bond. These ratings typically assign a letter grade to bonds that indicates their credit quality. A Triple B or BBB rating indicates medium-grade quality bonds, with adequate protection, that represents a relatively low-risk bond or investment. A BBB rating is the lowest rating a bond can have and still be considered investment-grade, being only two grades above junk bond ratings. This rating means that the obligator has adequate capacity to meet its financial commitments, however, adverse economic conditions or changing circumstances, these bonds are more likely to lead to a weakened capacity to meet its financial commitments.