The knowledge point to be examined in analyzing this question is the financial futures contract. Futures trading refers to the trading of standardized futures contracts by both parties in a centralized exchange market through open bidding. Financial futures are futures trading based on financial instruments. According to the basic tools, there are three kinds of financial futures: foreign exchange futures, interest rate futures and stock futures. (1) Foreign exchange futures, also known as currency futures, are contracts based on foreign exchange, the first variety of financial derivatives, and are mainly used to avoid foreign exchange risks. (2) Interest rate futures, including bond futures and main reference interest rate futures. (3) Stock futures are futures contracts based on a single stock, stock portfolio or stock price index. So the answer to this question is ABCD.