Looks to me like some profit taking and investors not understanding the assay results. I picked up this tidbit on the ASW Stockhouse forum. Thought you all might be interested:

I just talked to the IR about the drilling results. He told me that the result is spectacular. The co. expect the copper to be 1.03%, but it come out as 1.5%. They expect the grade on gold is 0.5%, but the result is 1.5%. If they get 1% of copper, the reserve is worth 5.6 billion dollars. Now they have more than that, so the reserve should worth even more than that. Most investors think of the project as gold project, but in fact it is only part of it. This is a multi metal project. The one vein of gold alone worth 300 million dollars, but the copper, silver, moly and others combined worth 5.6 billion dollars. The IR expected the share price to go to the roof to $1 after the news release, but instead it dropped like a rock. He is stunned by the investors response and the share price went to the oppositive direction. He realized maybe the assay results is difficult to read by most investors. He has already suggested the management explain the results in a more easy to read format, but he does not know whether they will do it or not.
He said all it takes is some investors mis-interpret the news, think the good news are bad news and started the selling, the others who can not understand the technical terms and started to sell when they saw other selling. The herd psychology just make it worse. If anyone care to know what it really means in the news instead of guessing and follow the wrong crowd, should call the IR to explain the news, hear from the horse's mouth

The IR firm: Mr. Jim Foy 1-847-945-2222
or Jeff 1-888-221-0915