The crude oil in the ICBC account corresponds to the futures price of crude oil in NYMEX (the New York Mercantile Exchange) of the United States, and the international crude oil is Brent crude oil in the futures exchange. Because the crude oil in the account corresponds to futures products, if it needs to be retained after maturity, the next product can only be purchased after the current product is settled, which is an extension business provided by ICBC.

Because there is a price difference between products in different periods, the cost held by customers will change during the transfer period, and it may be necessary to pay the price difference between them and increase the transaction cost. This is indeed a shortcoming of this product, but ICBC provides customers with tools to invest in crude oil products after all.

In addition, the price difference is not necessarily the extra cost paid by the customer during the exhibition period. In the first two extensions, because the price of the later products is lower than the price of the expired products, customers can still get benefits from the extension, which reduces the cost of the previous positions.