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Does the quarterly contract of stock index futures only refer to the next two consecutive months?
1, except for the current month, next month and the last two quarters. For example, it is February, and there are contracts in February, March, June and September. If it is March, there are contracts in March, April, June and September.

2. How to calculate the ups and downs on the first day of listing?

Based on the Shanghai and Shenzhen 300 Index ×300.