My last article on Achillion offered my opinion that ACHN might be more of a trading stock than an investment.
http://seekingalpha.com/article/1548562-it-looks-like-it-is-time-to-consider-achillion?source=feed
http://seekingalpha.com/article/1548562-it-looks-like-it-is-time-to-consider-achillion?source=feed
