Shares of some top coal companies are down at 10 a.m.:
Arch Coal fell $1.01 or 5.6 percent, to $17.14.
Consol Energy fell $1.82 or 5.7 percent, to $29.89.
Massey Energy fell $.78 or 4.9 percent, to $15.23.
Peabody Energy fell $1.17 or 4.3 percent, to $25.92.