The legality of CFD transactions has not been clearly defined. According to the Notice on Strengthening the Supervision of Bill Business to Promote the Healthy Development of Bill Market, the inquiry shows that at present, only certain financial products such as stocks, futures and foreign exchange are legal transactions, and CFD transactions are derivative transactions, involving price fluctuations in financial markets, including stocks, foreign exchange and commodities, but CFD transactions have not been clearly included in the legal scope.