https://www.cnbc.com/2025/10/10/trump-trade-tariffs-china-software.html
He teased this announcement earlier in the day and the stock markets dropped by around 3%. Trump waited until the markets closed to make the full announcement. He also made the announcement on a Friday, the markets won’t reopen until Monday.
The funny thing about his initial post is that he says China is trying to control the world’s economy by sending them letters to impose trade restrictions, which is the exact thing that he did. Trump’s quote below
https://www.youtube.com/watch?v=jUW0gXTfrJA
I found a YouTube link in your comment. Here are links to the same video on alternative frontends that protect your privacy: