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Flooding on the Yangtze River slowed barges carrying grain from northern ports to southern China. Spot corn prices at major Yangtze ports rose 30 yuan to 1,800 yuan a tonne in a week.
Floods also disrupted hydropower generation.
Barge delays raise freight costs and tighten corn supply in central and southern China, supporting domestic corn prices and possibly increasing import demand. The effect on world prices depends on how long the disruption lasts.
reuters.com2017年7月4日在过去 1,465 次看涨的天气事件之后，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 -1.4% 至 +1.9%），20 个交易日内为 +0.9%。
历史可比事件尚不足，暂无法给出历史解读。
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。
