Agency bonds are not quite as safe as Treasury issued bonds, but they are often safer than corporate bonds. They’re issued by government-sponsored companies. They are not backed by the “full faith and credit” of the U.S. government like Treasurys.
Municipal bonds, or Munis, as they’re commonly known, are issued by states, cities and local governments to fund various projects. Municipals aren’t subject to federal taxes, and if you live where the bonds are issued, they may also be exempt from state taxes. Some municipal bonds are more credit-worthy than others, though some munis are insured. If the issuer defaults, the insurance company will have to cover the tab.
Corporate bonds are bonds issued by companies. Corporate debt can range from extremely safe to super risky.
- Sound Mind Investing articles on bond investing. This is a list of very well-written and easy to understand articles. You can delve as deeply into the subject as you want at this site.
- Wall Street Journal personal finance pages - http://guides.wsj.com/personal-finance/investing/what-is-a-bond/