Not all headaches represent migraines, and migraine is not the only condition that can cause severe and debilitating headaches. For example, cluster headaches are very severe headaches that affect one side of the head in a recurrent manner (occurring in a cluster over time).
The United States government is the largest issuer of debt securities, and its bonds are considered the safest fixed-income investments available to your customer.
The Major Holders of the National Debt. The information presented in our chart above is preliminary, as the U.S. Treasury typically revises its foreign entity debt ownership data in March of each year. Overall, U.S. entities own just 65.8% of all debt issued by the U.S. federal government.