Their specialists look into a company's scenario and determine a bond score for the business. Every score service has its own formula for determining threat and its own type of rating scale. Normally, ranking scales are spelled out in letter grades, where an AAA ranking designates a safe, low-risk bond, and a D score designates a high-risk bond.government bonds, are typically low-yield bonds. You can depend on getting a payment but that payment will be little. what is a bond finance quizlet. On the other side of the spectrum, you have what's not-so-affectionately referred to as, which are low-rated, high-risk bonds. In order to attract financiers into buying these risky scrap bonds, the issuing business assure high yields.