8月31日己二酸与pa66商品比价指数为53.37，较昨日下降了0.55点，较周期内高点76.47点（2019-10-11）下降了30.21%，较2019年01月01日低点46.56点上涨了14.63%。(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，当天己二酸参考价为10340.00,自2021/7/15起，48天陆续下降了7.348%。当天下游商品pa66参考价为40350.00。
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