BC I think we generally understand that normal algo accumulation...

BC I think we generally understand that normal algo accumulation and divestment by large holders has been successful for many years and normally ensures a stable market without pushing up or down; sticking to the VWAP

It is predatory algorithms that scan the market for the vanilla algorithms being executed, that are the cause of the trouble. Predatory algos will jump in front of normal fund accumulation programs, pushing stock higher or lower. These then can be lumped in with HFT because they will also us HFT execution as part of their operation.
I think this survey will give all of us a good voice when delivered to ASX and ASIC as PPR is intending to do.
R