Every investment carries some level of risks along with it. Some people opt for high-risk investments because it offers a higher return in success, but of course, it is not guaranteed. To be on the safe side, one must have a thorough knowledge of which investment type typically carries the least risk. Type Of Investments Treasury Bonds The United States federal government provides its people with a low-risk investment option. It usually lasts from 20-30 years. The Treasury bond (T-bond) is like any other interest-bearing bond, but the difference lies in the point that the U.S Treasury Department issues it.