Lets speculate then...What could the negative news be?
La Casona? The November NR has oil and gas showings in all 4 zones, with producing light oil at 1,200 bopd choked at 20/64 inch choke. I dont think La Casona is an issue since it is an oil discovery. Maybe the length of time to confirm the full results is causing the issue.
I looked at Page 25 of the Corporate Presentation and the only remaining news for Q1 is the 2012 Year-End Reserve Report. I dont think this will be negative either as the results have been pretty much released already.
I think this is profit taking and a downward drift in SP until more news is released.