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On March 17, Mexico's President Claudia Sheinbaum signed a constitutional reform banning genetically modified corn cultivation. The step followed a December USMCA trade tribunal ruling against Mexico's 2023 decree restricting GM corn in tortillas.
Mexico rescinded three import-related provisions but kept the glyphosate phase-out, the import tracking protocol and the cultivation ban.
The constitutional ban makes restrictions on domestic GM corn planting more durable, while import rules are loosened, which supports continued US corn export demand to Mexico. The price effect is modest.
havanatimes.orgCircles Robinson2025年5月2日在过去 318 次看涨的政策事件之后，玉米 在 5 个交易日内中位数变动 -0.1%（48% 上涨；中间一半区间为 -1.4% 至 +1.5%），20 个交易日内为 -0.2%。
各商品基准价相对事件前最后收盘价的变动。历史数据汇总同类过往事件；仅描述已发生的情况，不代表未来走势。不构成投资建议。
