Devalue currency

what does the curriculum say about this?

i recall some part said a country could not because of several reasons like the country being just another player in the market and etc.

china came out and devalued and the market responded. But is this response rational?

No one is commenting bcuz they lost a lot of money today

im not following the news. so what exactly happened in the continued trade war between US and China?

there is a good chance that it went out of their control not intentional