The easiest way to make money on the market is volatility and predictability. Seeing as how Trump is so easily manipulatable and has no filter and his stupid declarations have such massive effects on the market, I wouldn't be surprised if someone is seeding him shit just to play the markets
Every country does that when exporting military tech.
I imagine that countries that have purchased jets from the US have some of their own equipment they install post sale that the US does not officially know about.