Abstract: A system and a method are disclosed for using a commodity-based exchange traded fund (ETF) to implement an electronic payment currency. The commodity-based ETF provides an inflation mirror using a basket of tradable commodities such as metals, energy, agricultural products, etc. Shares of the commodity-based ETF function as an electronic currency unit for use in transactions. A user may direct the system to transfer shares of the commodity-based ETF to a merchant in exchange for non-currency consideration such as goods and services.