The Poor Man's Commodities - Harris Carey

In the simplified sense, commodities are things of value produced by different producers, considered as equivalent and uniform in quality in the market. These are items that are grown or produced from land in different parts of the world and traded in the global market. In economics, commodities are a fungible market product used for human convenience. It has no qualitative differentiation across a market. The demand for one type can be different from other type but its price is determined as a function of its market value as a whole.