So where do you see Arch's stock price in January? I wrote some January $35 covered calls against some of my positions. I still think that in two years from now Arch will be over $50. Arch could easly be bought out at $50 which is still only a $7 billion market cap. The economic possibility of a liquid coal in the future will keep a lower cap on the stock.
I think Arch's price will be comfortably different from the beginning of January to the expiration date in January. Lots of bets placed in January, with many portfolios being rebalanced and lots of bets put on energy. I expect plenty of buying in January for the entire market with a lull into earnings and possibly beyond, except for energy which tends to do well in late winter.