The energy component of the widely followed S&P Goldman Sachs Commodity Index (GSCI) fell 41% from the start of 2015.
This was a larger decline than the industrial metals, grains, and precious metals components, which declined 24%, 19%, and 11%, respectively, in 2015.
Weakness in global economic growth contributed to the overall decline in commodity markets in 2015, but unique supply-side factors within certain commodity markets also affected prices.
