Flooding in Australian coal mines and power outages in South African ones led coal producers in those countries to halt or slow production, particular exports to asia, leading to spikes in prices.
Due to lower coal prices, Arch Coal posted lower-than-expected profits, hurting investor confidence and lowering shares.
Shares soar as Arch Coal announces that it will begin searching for new acquisitions, fueling investor confidence in the company's future ability to reduce competition.
Stock prices flatline as investor confidence is shaken, due to company expectations of share prices lower than analyst estimates.