Answer: A, B, C, D

The functions and effects of futures companies are: (1) Futures companies serve as a bridge between OTC traders and futures exchanges and ties, reducing transaction costs in the futures market. (2) Futures companies can reduce the degree of information asymmetry in futures trading. (3) Futures companies can efficiently realize the function of transferring risks and prevent the occurrence of systemic risks through the settlement process. (4) Futures companies can realize asset management functions through professional services.