The ruble is not an international reserve currency. When countries implement the gold standard, gold has the function of the world currency, so gold is regarded as the international reserve currency. After World War II, an international monetary system centered on the US dollar was established. First, the US dollar, and later other freely convertible currencies in the West became the main targets for countries to reserve foreign exchange assets. But the ruble has not yet become an international reserve currency.

International reserve currency refers to the international monetary funds held by a government that can be directly used for international payments. It is a part of international liquidity, and the government can use it as an international reserve currency to pay for gold or intervene in the foreign exchange market at any time to maintain the exchange rate of its own currency.

According to the statistical standards set by the International Monetary Fund for member countries, a country's international reserve currency consists of the following parts:

① Currency gold reserves held by the government;

2 freely convertible currency held by the government;

③ Reserve position in the International Monetary Fund;

(4) Unused special drawing rights allocated to the country by the International Monetary Fund.

As an international reserve, the IMF must meet two conditions:

First, it belongs to the government and can be used freely;

Second, the liquidity is high, that is, these assets are internationally used, and the government can use them for international payments or intervene in the foreign exchange market at any time.