Ann: Altium Technology & Business Strategy Presentation, page-55

Longer term holders aren't worried about growth or yield on cost, for some who come on here it's more than a ten bagger, check out the chart, for you I guess it depends on your buy in price. There have been some rumours about a take over since Aconex got hit but that doesn't seem to have come to anything so that may have something to do with it, but really, 2.35% is nothing for a stock that's been going gang busters recently.

PS I'd like your portfolio if "ALU is the only one showing (what you consider) a significant decline (2.35%)." .