I don't think it was a mom and pop trade. The after hours jump from 1.20 to 1.25 was a cross-trade followed by a handful or larger trades (compared to the day's trading). See final trades below. By comparison, most trades today were 74 shares (dozens of them) and many more with smaller amounts, so bot trading for any one of several reasons. My guess (see article link) is that most of the post 4pm trades were hedges: http://www.compareshares.com.au/expert_broker3.php