A: Hello, futures weighting is the weighted average of contracts in several specific months. The weighted average price of futures refers to the average price calculated by taking the futures quantity as the weight. Weight means that the weights used in the adjustment calculation are different due to the different precision of the measured values. The higher the accuracy, the greater the weight. "Weighting" means "multiplying by weight", which means "multiplying by coefficient".

I. If in the future

Futures IF: Shanghai and Shenzhen 300 Index is a constituent stock index compiled by selecting 300 A shares from Shanghai and Shenzhen stock markets as samples. The sample of the Shanghai and Shenzhen 300 Index covers about 60% of the market value of the Shanghai and Shenzhen markets, which has a good market representation. Contract name: IFAABB, if it is the Shanghai and Shenzhen 300 index futures, AA, contract expiration year, BB, contract expiration month.

Second, the weighting method

A set of data is given, in which 3 appears 6 times, 4 appears 3 times and 2 appears 1 time. 6,3 and 1 are called weights. This method is called weighting method. Generally speaking, the average is to add up all the numbers and divide them by the total. Expressed as: (p 1+p2+p3+? ..+pn)/n. However, some data records have some identical data. When calculating, when a number has several identical numbers, multiply this number by several. This number is called weight and weighting, which is multiplied by several and then added. The average is still divided by the total.

For example, when the school calculates the final grade, the mid-term exam accounts for 30%, the final exam accounts for 50%, and the homework accounts for 20%. If someone has a mid-term exam of 84, a final exam of 92 and a homework score of 9 1, if it is an arithmetic average, then it is (84+92+91)/3 = 89;

Then the weighted value is 84× 30%+92× 50%+91× 20% = 89.4, which is 30%, 50% and 20% when the weight is known. What if the weight is unknown? I want to know the weighted average of two classes. There are 50 students in class one, with an average of 80, and 60 students in class two, with an average of 82. The arithmetic average is (80+82)/2=8 1, and the weighted average is (50 * 80+60 * 82)/(50+60) = 8 1. Full score 10, 8 for experts, 6 for teachers and 7 for students, but you think the weight of experts and teachers and students should be 0.5:0.3:0.2, so the weighted value is 8*0.5+6*0.3+7*0.2=7.2, and the arithmetic average is (8+6+7.