Positions in different commodities cannot be offset for the purpose of calculating the open positions as described in Paragraph CA-12.2.1 above. However, where two or more sub-categories⁷⁰ of the same category are, in effect, deliverable against each other, netting between those sub-categories is permitted. Furthermore, if two or more sub-categories of the same category are considered as close substitutes for each other, and minimum correlation of 0.9 between their price movements is clearly established over a minimum period of one year, the bank may, with the prior written approval of the CBB, net positions in those sub-categories. Banks which wish to net positions based on correlations, in the manner discussed above, will need to satisfy the CBB of the accuracy of the method which it proposes to adopt.

⁷⁰ Commodities can be grouped into clans, families, sub-groups and individual commodities. For example, a clan might be Energy Commodities, within which Hydro-Carbons is a family with Crude Oil being a sub-group and West Texas Intermediate, Arabian Light and Brent being individual commodities.