中期协：5月全国期货交易市场成交量和成交额同比分别下降4.51%和1.55%

Group 1 - The core viewpoint indicates that the national futures market in China experienced a decline in trading volume and value in May compared to the previous year, with a decrease of 4.51% in volume and 1.55% in value [1] - Cumulatively, from January to May, the national futures market showed significant growth, with a trading volume increase of 15.61% and a trading value increase of 21.33% year-on-year [1] Group 2 - In May, the total trading volume reached 678,609,037 contracts, while the trading value amounted to 547,298.81 billion yuan [1] - The cumulative trading volume for the first five months was 3,336,834,307 contracts, with a total trading value of 2,869,344.22 billion yuan [1]