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A University of Maryland study uses more than 34,000 yield observations from 25 countries back to 1900 to examine simultaneous crop shocks in global breadbaskets. It finds that maize yield shocks hit at least three of nine breadbaskets at once 10.3% of the time.
Shocks across four or five breadbaskets were much rarer.
The findings show that climate-driven shocks in several major grain regions can coincide, which raises the risk of sharp global maize price spikes. The study is a historical analysis and does not signal an immediate price move.
essic.umd.eduCazzy Medley2023年2月2日在过去 445 次中性的天气事件之后，玉米 在 5 个交易日内中位数变动 +0.1%（52% 上涨；中间一半区间为 -1.4% 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。
