A supply of a commodity is owned by an investment vehicle. A sponsor of the investment vehicle receives a delivery application. A custodian stores the supply of the commodity as a collection of first physical units. A commodity dealer specializing in trading the commodity agrees to conduct trades with the sponsor to convert a first quantity of the supply for a second quantity of the commodity. A broker dealer trades shares of the investment vehicle. The delivery application is provided by a shareholder, and specifies a physical format for the second quantity of the commodity.