6月至7月中旬,CBOT农产品期货价格全线快速攀升,美玉米、美麦和美豆类等最大涨幅均超过40%,其中豆粕、大豆和玉米先后创历史新高,小麦则创11年来高位。7月下旬,CBOT农产品涨势趋缓,美豆类、美麦冲高回落,美玉米则维持高位运行。干热天气豆类涨势突出二季度至三季度是美国农作物的主要生长周期,而二季度以来美国中西部农作物的主产区天气持续干热,干热程度超过对农作物影响较大的1988年,而6至7月甚至可能成为1895年以来同期最干热时期之一(见图1、图2)。恶劣的天气引发农产品新作物年度单产下滑的预期,推升期价大幅走强。由于玉米抗旱差于小麦和大豆,因而近期涨幅居前;但从全年价格表现来看,美豆类仍旧领涨玉米在内的其它商品,为本年度最强商品品 From June to mid-July, the prices of CBOT agricultural futures surged rapidly across the board. The largest increase in the US corn, the United States and the United States reached more than 40%. Among them soybean meal, soybean and corn hit record highs in succession while wheat hit a record high in 11 years. In late July, the gains of CBOT agricultural products slowed down. The US beans, US wheat and wheat finished lower while the US corn maintained their highs. Dry and hot weather beans highlight the second quarter to the third quarter of the United States is the main crop growth cycle, and since the second quarter of the central and western regions of the United States continued to dry weather, the main producing areas of dry weather, dry heat degree of greater impact on crops in 1988 , While June-July may even be one of the warmest in the same period since 1895 (see Figure 1, Figure 2). Harsh weather triggered a crop of agricultural crops expected annual decline in output, pushed up the price of sharply stronger. As corn is far less drought-resistant than wheat and soybeans, its recent gains are among the highest. However, from the perspective of annual price performance, the US legumes are still leading other commodities, including corn. This is the strongest commodity of the year