zinc up over 4% over night, page-16

I suspect those no-price discovery dumps are being done by someone who has sold a lot of stock at higher prices and are now trying to do as much damage to sentiment and the share price as possible to try to trigger other holders into dumping their stock at 20c or below.

Normally the ASX would query dumps like that with no price discovery but this 'seller' seems to have some protection because it has been going on for a long time.
Maybe they are in the finance industry to be able to get away with that sort of behaviour? They are probably on the OVR threads. See everyone is still buying or holding. Yet dozens of 'long term' 'investors' with 'Buy' sentiment have gone missing from these threads in recent weeks. Quality stuff.