system
Given the following post, respond as if you're commenting on Reddit:
human
What does a country need to do to be considered a currency manipulator? What countries are notorious manipulators past or present and has the US ever been a currency manipulator?
gpt
There's no clear definition in Economics. The whole idea comes from Politics.

Some countries have currency policies that other countries don't like. The other country (or countries) labels them a "manipulator".

Economists argue about which policies are best. But that doesn't make any of them more clearly problematic than any others.

There are certainly some policies that limit the freedom of people to do certain things. For example, capital controls which limit people's ability to take their money or capital across borders. But that's more an issue of general liberty and personal liberty.