Columbia - i think the opposite would occur as UMC's announcements are typically much lower profile and conservative.
I think post JORC there will be an initial buy on rumour sell on fact pull back but the price will rise in stepwise steady fashion from there as we get to prefeasibility.
The fact is I am reasonably assured that UMC ore will get sold, the same cannot be said for most CID's when FMG has CID coming out of their ears.
UMC Price at posting:
0.0¢ Sentiment: Buy Disclosure: Held