The so-called foreign exchange investors, in order to predict the rise and fall of the exchange rate, use spot, forward or forward trading channels to engage in large foreign exchange transactions with a small amount of margin. When the market is bullish, they buy first and then sell. When the market is bearish, they sell first and then make up their positions, earning the price difference in the middle with minimal fluctuations and making huge profits. Therefore, foreign exchange investors are often the main foreign exchange investors.

Foreign exchange is the creditor's rights held by the monetary management authorities (central bank, monetary management institutions, foreign exchange stabilization fund and Ministry of Finance) in the form of bank deposits, treasury bonds and long-term and short-term government securities. , which can be used when the balance of payments is in deficit.

Including foreign currency, foreign currency deposits, foreign currency securities (treasury bonds, treasury bonds, corporate bonds, stocks, etc.). ) and foreign currency payment vouchers (bills, bank deposit vouchers, postal savings vouchers, etc.). ).