It is no secret that Nyrstar will take out IBG at some point. It...

It is no secret that Nyrstar will take out IBG at some point. It make commercial sense to do so and secure unfettered and exclusive access to resources for their Europe based smelting plants. The dilemma for Nyrstar executives is when and at what price.
If they wait over the summer and the price falls back then they achieve a lower takeover price. However, with the resource in Greenland proving to be bigger than Ben Hur, the share price is rising to reflect this.
Should another investment company start building a stake then Nyrstar will have to deal with it as well as Glencore's 13% stake. IBG must be attractive to such investment companies now as it presents a potential quick profit.
If the final results of the summer drilling indicate a much larger resource, open at any side, it will be hard for other zinc miners to ignore the potential. So other zinc miners might look to take a stake with a view to sharing the resource with Nyrstar.
The potential is there for all who get on board.
My prediction is that Nyrstar will move sooner rather than risk any of the above. The option of waiting seems to have disappeared with share price doubling in the past few months and moving ahead strongly.