The terms "security," "security entitlement," and related terms are defined in Section 8-102, and the term "securities account" is defined in Section 8-501. The terms "commodity account," "commodity contract," "commodity customer," and "commodity intermediary" are defined in this section. Commodity contracts are not "securities" or "financial assets" under Article 8. See Section 8-103(f). Thus, the relationship between commodity intermediaries and commodity customers is not governed by the indirect-holding-system rules of Part 5 of Article 8. For securities, Article 9 [Maine cite Article 9-A] contains rules on security interests, and Article 8 contains rules on the rights of transferees, including secured parties, on such matters as the rights of a transferee if the transfer was itself wrongful and gives rise to an adverse claim. For commodity contracts, Article 9 [Maine cite Article 9-A] establishes rules on security interests, but questions of the sort dealt with in Article 8 for securities are left to other law.

The indirect-holding-system rules of Article 8 are sufficiently flexible to be applied to new developments in the securities and financial markets, where that is appropriate. Accordingly, the definition of "commodity contract" is narrowly drafted to ensure that it does not operate as an obstacle to the application of the Article 8 indirect-holding-system rules to new products. The term "commodity contract" covers those contracts that are traded on or subject to the rules of a designated contract market and foreign commodity contracts that are carried on the books of American commodity intermediaries. The effect of this definition is that the category of commodity contracts that are excluded from Article 8 but governed by Article 9 [Maine cite Article 9-A] is essentially the same as the category of contracts that fall within the exclusive regulatory jurisdiction of the federal Commodity Futures Trading Commission.

Commodity contracts are different from securities or other financial assets. A person who enters into a commodity futures contract is not buying an asset having a certain value and holding it in anticipation of increase in value. Rather the person is entering into a contract to buy or sell a commodity at set price for delivery at a future time. That contract may become advantageous or disadvantageous as the price of the