The contract months of the Shanghai and Shenzhen 300 stock index futures contracts are the current month, the next month and the next two quarters, with a total of four months. Seasonal months refer to March, June, September and 65438+February. As the current time is 2065438+March 28th, 2005, there are four contracts in the futures market: 1503, 15438+0504, 15438+0506, 15438. Of these four contracts, 1F 1503 and 1F 1504 are the contracts of the current month and the next month; 1F 1506, 1F 1509 are the next two quarterly contracts.