Shares of some top coal companies are down at noon:
Arch Coal fell $1.58 or 8.7 percent, to $16.57.
Consol Energy fell $2.58 or 8.1 percent, to $29.13.
Massey Energy fell $1.59 or 9.9 percent, to $14.42.
Peabody Energy fell $2.42 or 8.9 percent, to $24.67.