Monetary sweatshirts are often used to exchange fixed-rate payments on debts for variable-rate payments; That is, debts for which payments can vary with the upward or downward movement of interest rates. However, they can also be used for fixed rate transactions for fixed rate and for variable rate transactions.  Nevertheless, monetary policy is not attractive to investors, especially when they want to return their profits to China, given that Zimbabwe is facing a currency shortage. These swaps are useful given the scale of trade between China and these nations. In 2017, trade between China and South Africa, Egypt and Nigeria amounted to $23.5 billion, $10.8 billion and $13.8 billion, respectively.