Markets tend to look at the yield curve in order to find clues as to what the expectations are about future economic growth and inflation. The yield curve is essentially the current yield on government Treasury bonds from 3-month maturities to 30-year maturities. At the end of May, the 1, 2, 3, 6 month and 1-year notes all yielded more than the benchmark 10-year bond. When shorter term bonds are yielding more than longer term bonds, it is known as an inversion or inverted yield curve.
Economically sensitive copper and oil prices fell in May, perhaps signaling weaker global growth activity. Such dynamics in the commodities market tends to push yields lower internationally. Some analysts believe that a continued escalation of trade disputes with countries in addition to China will crimp global economic growth and force the Federal Reserve to lower interest rates.
Total global debt as of the end of 2017 was $184 trillion, as monitored by the International Monetary Fund (IMF). Global bond yields fell in May with an estimated $10.6 trillion worth of debt now in negative yielding territory, the highest since 2016.
Some fixed income analysts are projecting lower yields later this year due to slowing economic expansion, continued demand for U.S. government debt, and an increasing probability that the Fed will eventually lower rates.
Sources: IMF, Treasury Dept., Federal Reserve