I wondered the same thing. The volumes aren't that high...

I wondered the same thing. The volumes aren't that high (although higher than normal) so its hard to say and its relatively small trades, so doesn't look like pattern when an individual is trying to build up a stake. Doesn't really look like info has leaked either type of pattern. Perhaps its just people getting on board prior to FDA approval (I don't think the co has really indicated when in 2019 this will happen, but I had assumed it would be later in year). Otherwise Australian approval for respiratory kit. I thought it might also be traders who notice a price jump and then buy in anticipating further rise. To those of us who've been in this co for a while its ironic to see it rise on little news while previously it did nothing on good news for an extended period. That said I still don't think its overvalued.