Key Currency
1. Key Currency
Without knowledge of the key currency, it's impossible to understand the political economy of the US and its peculiarities.
The country that issues the key currency has a current account deficit because it provides liquidity to the international economy.
Countries reserve the key currency as foreign exchange reserves.
There is a demand for the key currency, the US dollar, as a safe liquid asset in the world economy.
2. Trading Volume Share by Currency
The table and treemapping were made according to statistics from the BIS.
・Daily Trading Volume Share by Currency (2022) (PDF)