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.
Again, governments could help accommodate these portfolio shifts by increasing their debt issuance. How much public debt is too much? There is no straightforward answer. However, it seems that many countries may be able to afford to have significantly higher ratios of government debt to national income.