It appears Lowes' address may have had something to do with it: http://www.rba.gov.au/speeches/2015/sp-dg-2015-03-05.html Story hit at 12:32: No idea how to explain it though.
Week 46 Wrap: Copper hits 2mth low as Trump threatens net zero pace; US rally fades; HotCopper’s picks
AN1 CuFe sells its Crossroads gold royalty to Northern Star for $4M cash; says better than waiting for mine launch