Wizard,
my guess is that the market maker is trying to take out some trailing stops....I never put stops on my stocks anymore, it has cost me short term sometimes, but if I stay long it usually come back up quickly after they have made their run at the stops and other weak hands panic at a drop and sell!
If I was more adept at trading in and out of certain stocks, I could probably be making more money, but I have found that if you have confidence in the stock and the management of the company, that you can profit just as much without a whole lot of the trouble and time that you have to put in doing the work. Especially with a stock like ARU that has only just started its story to the larger outside world of investors.
Best Regards...and just my thoughts,
Long for Cash