It is my understanding that this is not improper.
Congressmen are allowed to call hearings, interview company officials for otherwise private insider trading information, and then place stock and/or bond trades based on that information.
That all is something that isn't bandied about too much. Wonder why?
“It is my understanding that this is not improper”
I think it is an ethics issue. It looks bad.
The fact that the investment is a small percentage of her assets is irrelevant.