Indonesian coal

Has seen prices rise from $100 per ton in April 2021 to around $300 (it was $400 a bit ago). It started a while ago, before the Ukraine war, but has been effected by Europe's new energy issues.

The government of Indonesia requires coal producers to sell 25% in Indonisia at prices it decides ("domestic market obligation"), and the companies are making a good profit off the rest on the open market.