The United States has put South Korea back on its monitoring list of major trading partners whose currency practices call for closer attention.

The U.S. Treasury Department added South Korea and six other economies to the list in its semiannual Report to Congress on Macroeconomic and Foreign Exchange Policies of Major Trading Partners of the United States.

The others were China, Japan, Taiwan, Singapore, Vietnam and Germany.

South Korea was removed from the list for the first time in seven years in November last year and remained off the June list before being added back this time. 

The U.S. Treasury Department evaluates the macroeconomic and exchange rate policies of its top trading partners. 

Countries that meet two of the department’s three criteria are designated as “watchlist” countries, and those that meet all three are considered potential currency manipulators that require “enhanced analysis.”