Bulk inventory refers to the material goods that can enter the circulation field, but not the retail link, and have the commodity attributes for industrial and agricultural production and consumption. In the financial investment market, bulk commodities refer to homogeneous and tradable commodities widely used as industrial basic raw materials, such as crude oil, non-ferrous metals, steel, agricultural products, iron ore and coal. Including three categories, namely energy commodities, basic raw materials and agricultural and sideline products.

Commodities can also be short, but the risk is greater.