Coal and the Global Energy Crisis
Indonesia’s coal reference price (HBA), which combines three international indices (the Newcastle Export, Global Coal Newcastle, and Platts) and the Indonesia Coal Index (ICI), increased sharply to $161.63 per ton.
"The sky is the limit" is the appropriate idiomatic expression to describe the current increase in coal prices, which are continuing to skyrocket. It is not easy for anyone to predict at what level the coal prices will stop.
Coal prices this month surpassed the highest level in the last 13 years, or US$190.95 per ton in early July 2008.