 Coal miner stocks are falling, in the wake of the Supreme Courts ruling that restricts the U.S. governments reach in controlling emission from coal-fired power plants. Shares of Peabody Energy Corp.s stock BTU, -6.97 sank 7.1 in morning trading, Arch Resources Inc. ARCH, -6.65 dropped 5.7 and Warrior Met Coal Inc. HCC, -5.18 slid 5.2. 