Answer:
Step 0: Be rich
Step 1: Announce ridiculous tariffs
Step 2: Markets slump
Step 3: Buy cheaper shares etc.
Step 4: Cancel/Pause tariffs
Step 5: Markets recover
Step 6: Sell more valuable shares a couple of days after you bought them
Step 7: Be richer
It might not be Trump's idea but there are certainly people around smart enough to have him do this.
Edit: Since so many people are saying it I'll clarify. I'm not saying they're all out here making billion dollar trades. Even buying and selling a few million could net you enough to buy that car you saw in the auction booklet or get that watch, and for doing nothing. Are these people that pathetic? Of course. Trump won't pay contractors a few grand for a job. Of course they're gonna go "I want a new diamond Patek Philipe! Announce a tariff against Germany today then reverse it 5 days from now!"
我今天前也提出了相似的問題。