Trump tweets and the efficient market hypothesis
One of the greatest features of the American government is that even the executive has incredibly limited influence, both on government and society. It is encouraging that, even with a strong personality like President Trump, that holds true – the executive cannot simply bully his corporate enemies into submission. Of course, there is likely still a chilling effect based on the perception that President Trump has real influence on market caps, but at least it is simply rooted in perception and not reality.