$1 is worth BRL 10.
You buy $ 100 with BRL 1000. You tell your broker, you'll pay him back later the BRL, for a fee. That's a "short".
You package it in a bet that says "whatever the difference is in BRL when I pay you back, we will do it 10x". That's "leverage", alternatively also "insane stock market gambling nonsense".
The tariffs get announced. You can now get BRL 10.2 for $1, because that's how the stock market thinks it's should be. You pay back your debt in BRL with $98. The difference of $2 gets increased 10x because of that bet. Congratulations, You made $20 with insider trading.
Usually you try to hide these things among the general stock market noise and not trade so much money, that it makes a visible dent in the evaluation of an entire fucking currency. It's common place, but as usual with Trump, just more on the nose, more blatant and just more fuck you.
I got fired two weeks ago and it fucks me up pretty badly.
But the fact that i don't have to use Teams, at least for a while, is just such a relief. Fuck that shit.