Take a read through this post from Kentboy on the AVB thread,...

Take a read through this post from Kentboy on the AVB thread, content originally came from Croc on the CDU thread.

They have been researching short selling and other instruments being used, outcomes alledge collussion detrimental to shareholders and companies.

http://hotcopper.com.au/post_threadview.asp?fid=1&tid=1960827&msgno=9149605#9149328

The executive summary in this link explains outcomes from the research (same link as provided by Croc via Kentboy)
http://www.scribd.com/doc/129258881/7-1-Research-Findings-in-Relation-to-CDU-LYC-BBG-and-EGP?in_collection=4167210