not considered insider trading and are legal because the companies announce in advance of the buy backs that they plan on doing so.
this. i dont think they technically have to announce it, but when the buy order is put out it's made public. As long as everyone knows about it, it's not inside information, it's just used as an indicator for the relative strength of the company. plus there are a ton of timing and quantity restrictions to prevent price manipulations like pump and dumps as well.
This post was edited on 12/13 at 2:49 am