The conventional wisdom is that interest in USA is on its way up.
$A is considered is a resource currency.
With China slowing and the big drop in commodity prices the $A is predicted to drop further.
I think the sell down is from a big oversea(US) funds to protect themselves from the drop of $A.
MXUPA has not missed a single interest repayment and Brookfield is doing well with 200 billion under managment
Just my opinion