No volume of consequence. It's just another fund buying in who isn't price sensitive for good trades. Action won't begin until >$48 when new 52 high reached ...or... Jan 1st where some can get in under the radar.
In other words, stay tuned. If ATHN puts another quarter of estimate beating results together, and that's a big IF, than we'll see action. Otherwise, too many naysayers against ATHN and Bush to get much speculative action other than a squeeze.