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An explainer on how USDA reports drove large corn and soybean price swings in 2020. Revisions to the 2020 corn yield and to ending stocks, including a 205 million-bushel cut, sent prices rallying past pre-pandemic levels.
The article frames the reports as a major source of market volatility.
Surprise USDA revisions can rapidly reprice corn and soybeans, so feed buyers should watch report dates and hedge around them. The article does not describe a new supply change.
在过去 2,389 次报告事件之后,大豆 在 5 个交易日内中位数变动 0.0%(50% 上涨;中间一半区间为 -1.6% 至 +1.9%),20 个交易日内为 +0.1%。
在过去 770 次中性的报告事件之后,玉米 在 5 个交易日内中位数变动 +0.2%(54% 上涨;中间一半区间为 -1.1% 至 +1.6%),20 个交易日内为 +0.7%。
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。