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USDA confirmed New World screwworm in a Texas calf, the first US case since 1966, after the pest moved north through Mexico. Feeder cattle futures initially dropped on consumer demand fears, then rallied more than 3%.
USDA says it believes the case can be contained.
A spreading outbreak could further shrink a US cattle herd already at its smallest in 75 years, tightening supplies and supporting feeder and live cattle prices. Losses of up to $1.8 billion are estimated for Texas if the pest spreads.
investing.com2026年6月4日在过去 122 次看涨的疫病事件之后，架子牛 在 5 个交易日内中位数变动 +0.4%（60% 上涨；中间一半区间为 -1.0% 至 +1.6%），20 个交易日内为 +2.0%。
在过去 148 次看涨的疫病事件之后，活牛 在 5 个交易日内中位数变动 +0.4%（62% 上涨；中间一半区间为 -0.5% 至 +1.2%），20 个交易日内为 +1.4%。
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。
Reuters reports feeder futures rallied more than 3% after an initial drop following the screwworm case, matching the size of the move via supply-risk repricing.
