The data displays the market capitalization of the four of the leading United States coal companies from 2011 to 2016. Peabody Energy had a market capitalization worth 19.7 billion USD in 2011, and by 2016 it had decreased to 30 million USD.
Peabody Energy | 19700 | 7000 | 30 |
Arch Coal | 6000 | 1000 | 6 |
Walter Energy | 8200 | 1000 | 6 |
Alpha Natural Resources | 10700 | 1600 | 3 |