Managing company is apperantly in a deep hole. And it got everyone blindsided. I doubt the government is going to bail them out too, so all that's left is hope - hope that it is all just market manipulation.
In addition, check out EMB - for live update on the value of the emerging markets bonds market. It is pretty ugly there too, so on the fundumentals there's reason for AWF to fall - but not 20% on a day. The 20% is from the uncertainty regarding AB.