The ICE Futures Europe symbol for Brent crude futures is B. FINRA regulates trading in equities, corporate bonds, securities futures, and options. Enron traded in energy derivatives specifically exempted from regulation by the Commodity Futures Trading Commission. For a list of tradable commodities futures contracts, see List of traded commodities. The contracts were subject to review by the Commodity Futures Trading Commission. These contracts were similar to modern futures trading. They may, however, be subject to regulation by the Commodity Futures Trading Commission. Those that buy or sell commodity futures need to be careful. Jeczalik also embarked on a new career in trading in futures contracts. Storage costs are costs involved in storing a commodity to sell at the futures price. Options over grain futures are also traded. He also worked at Bloomberg Tradebook where he was a developer of futures trading software. Five tick failed breakouts are characteristic of the stock index futures markets. Other securities such as options futures, etc. Specifically, Shiller advocated for the creation of macro futures markets.