Commodity futures, stock futures, foreign exchange futures, medium and long-term interest rate futures usually use physical delivery, while stock index futures and short-term interest rate futures usually use cash delivery. Representative short-term interest rate futures in the international market include 3-month Eurodollar futures, 3-month Eurointerbank interest rate futures and 3-month Pound interest rate futures. China Financial Futures Exchange is engaged in financial futures trading. At present, the main varieties are Shanghai and Shenzhen 300 stock index futures, 5-year treasury bond futures, 10-year treasury bond futures, SSE 50 stock index futures and CSI 500 stock index futures.