"The movement down on news probably has to do with the short interest" There's only a miniscule amount of short interest here: "Short Selling Data Short Interest 132,400 (100%) Oct 31, 2011 Significant Failures to Deliver No" http://www.otcmarkets.com/stock/CAMS/company-info More likely the movement down on news is due to the fact that it's entirely obvious that this is a rather poorly constructed pump and dump campaign.