- In December 2015, the Bord Gáis Energy Index fell 13% as wholesale prices for Brent crude oil, UK gas, European coal, and Irish electricity all recorded losses. The index stood at another record low of 79.
- Prices continued to decline across the board, with oil falling 19% to close below $38/barrel for the first time in a decade due to oversupply and weak demand. Other fuels like UK gas and European coal also recorded losses.
- The euro strengthened against the US dollar and British pound over the month, exacerbating losses in the energy index which is adjusted for currency movements.