Return for the year of exchange certificates The review of the performance for the year of commodity-based certificates in the commodity exchange shows that these investment vehicles recorded significant returns in the period between November 4, 1404 and November 4, 1405. Bitumen with 417% and T9 van with 410% have the highest efficiency on this list. Then iron ore pellets with 229% and copper cathode with 213% are placed. The variety of underlying assets in commodity exchange certificates provided the opportunity to invest in a wide variety of commodities. 02154906.