In case one is blinded by partisan bias, remember than Hillary Clinton made a similar statement[0] against the pharmaceutical industry during her campaign, and likewise sent stocks temporarily falling.

[0]: https://www.thestreet.com/story/13684503/1/hillary-blasts-dr...

never under estimate the power of the "bully pulpit". If he gets people talking in the press about then it can bubble back up to Congress if not board rooms of companies looking to garner good will of the public