Their experts look into a company's circumstance and figure out a bond score for the company. Every score service has its own formula for measuring risk and its own kind of ranking scale. Usually, score scales are defined in letter grades, where an AAA rating 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 however that payout will be little. which of these describes a bond personal finance. On the other side of the spectrum, you have what's not-so-affectionately known as, which are low-rated, high-risk bonds. In order to lure financiers into purchasing these risky scrap bonds, the providing companies guarantee high yields.