Many professionals were left behind in this round of rally, because they don't believe the rally may sustain since economy has still been in bad shape, and face a lot of uncertainties. Recently with good economic figures emerging, fund mangers believe the turnaround is really happening, and emerging market may has better chances than US. Then they start to grab the hiden gems in emerging market. ACTS has been insanely traded below cash and it is natually attracted the eyes of professionals. Once they buy, the price has to move big due to the size of their transactions. As small investors, we should ride this tide, hold or buy more on solid small caps in BRIC market.