2008年国际金融危机以来,国内玉米价格出现了大幅下滑,国家为保护农民利益,防止粮价过度下跌,2008年下半年在东北地区采取了临时收储政策,自此国内玉米市场呈现出以政策为导向的特征。由于国内玉米连续5年丰产,从2005年开始国内玉米市场一直处于供大于求的状态,2008年国 Since the international financial crisis in 2008, the domestic corn prices have dropped sharply. In order to protect the peasants’ interests and prevent the grain prices from falling excessively, the state adopted a temporary policy of purchasing and storing in the northeast region in the second half of 2008, Oriented feature. Due to the continuous high yield of domestic corn for 5 years, the domestic corn market has been in a state of oversupply since 2005. In 2008,