You know, Trump still hasn't fully revealed the extent of his business and financial holdings, which are nominally managed by his idiot sons with a non-existent wall of separation between their business decisions and administrative decisions.
Suppose... for a moment, that Trump just wanted to make some money. Short the market right before tweeting about more tariffs, or something like that.
Funny thing about "conflict of interest" laws. There are no conflict of interest laws for presidents. Minor glitch in the legal code. As for insider trading, I don't know if it would apply, given that you can't not know about your own actions. That, of course, is why Trump was advised to divest and put his assets in a blind trust by literally every person in the country capable of explaining the concept of "ethics."
Still, he has the power to cause markets to drop with tweets. He has to know how to short the market, and what's the SEC gonna do to their boss?
Is he shorting the market before tweeting about tariffs? I don't know. However, if his idiot sons can't figure out how to make money off of this, then they're even dumber than I ever would have thought.