10月20日烧碱与瓦楞纸商品比价指数为177.08，较昨日上升了4.71点，创下周期内的历史新高，较2021年03月08日低点48.69点上涨了263.69%。(注：周期指2017-01-01至今)
注：本站定义，比价指数为周期内上下游商品每日价格之比的定基指数化结果。
据本站数据，当天烧碱参考价为1785.00,自2021/5/23起，151天陆续上涨了290.164%。当天下游商品瓦楞纸参考价为4060.00,自2020/5/21起，518天陆续上涨了35.333%。
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