Acommodity in which someone invests might include a

Commodities are tradable goods in the stock market. There are energy (oil, coal, natural gas), metals (copper, nickel, zinc, gold and silver) and food or inputs (wheat, corn or soybeans).

In times of economic instability, investments tend to move from the stock market to less risky products such as commodities, increasing their value as demand rises.

it would have to be gasioline