Just as a point of interest MMX has issued the following notice regarding their OPR stake...
http://www.abnnewswire.net/press/en/67904/Murchison_Metals_Limited_(ASX:MMX)_Response_To_Media_Articles_Regarding_Oakajee_Port_And_Rail_Investment.html
They state that selling all or part of their stake in OPR is a potential option...
Confirms the reason for IP acquisition