RE: Huge insider buying in Septmber!johminus, I don't think there is so much to understand yet. Insiders have bought because they feel confident about the near term future. They might understand where Lindero is going, or that majors are knocking on the door. Or it might be Rio Grande.
Anyway, we can not expect the good things to happen within weeks. They might have bought for something that will play out over the next half a year. Also, the market doesn't react much because most people don't watch insider sales in MDR. Actually, most people don't even know MDR. You just need to wait and see what happens with Lindero and Rio Grande.
Also, I would say that the market did react a bit. We are at 4 dollars now.
MDR hasn't moved much this year, so it should be ripe for a large movement some time in the not too distant future, I think.
Cheers.