Ratings and creditworthiness Loan

Specific bond debts owed by both governments and private corporations is rated by rating agencies, such as Moody's, Fitch Ratings Inc., A. M. Best and Standard & Poor's. The government or company itself will also be given its own separate rating. These agencies assess the ability of the debtor to honor his obligations and accordingly give him a credit rating. Moody's uses the letters Aaa Aa A Baa Ba B Caa Ca C, where ratings Aa-Caa are qualified by numbers 1-3. Munich Re, for example, currently is rated Aa3 (as of 2004). S&P and other rating agencies have slightly different systems using capital letters and +/- qualifiers.
A change in ratings can strongly affect a company, since its cost of refinancing depends on its creditworthiness. Bonds below Baa/BBB (Moody's/S&P) are considered junk- or high risk bonds. Their high risk of default (approximately 1.6% for Ba) is compensated by higher interest payments.
Bad Debt is a loan that can not (partially or fully) be repaid by the debtor. The debtor is said to default on his debt. These types of debt are frequently repackaged and sold below face value. Buying junk bonds is seen as a risky but potentially profitable form of investment.