简介：RareearthpriceroseagainassalesheatingupsinceNovember.Sufferedtheoversoldandexperiencedtherecentpositiveandconstantmultiplestimulus,rareearthindustryiswelcomingitsperiodic'turningpoint'.ItisunderstoodthatsomemanufacturersbegantooverhaulinNovemberandtheupstreamproductionwillbereducedcorrespondingly.However,demandsfrommagnetandotherdownstreamindustriesarerelativelystable.Drivenbyrestrictingoutputandnationalreserve,profitabilityofrareearthindustryisexpectedtoimprove.Securities'researchreportsshowthatnationalreserveposedasignificantsupporttorareearthpricesinrecentyears.

简介：Thispaperpresentsamethodofconstructingamixedgraphwhichcanbeusedtoanalyzethecausalityformultivariatetimeseries.Weconstructapartialcorrelationgraphatfirstwhichisanundirectedgraph.Foreveryundirectededgeinthepartialcorrelationgraph,themeasuresoflinearfeedbackbetweentwotimeseriescanhelpusdecideitsdirection,thenweobtainthemixedgraph.Usingthismethod,weconstructamixedgraphforfuturessugarpricesinZhengzhou(ZF),spotsugarpricesinZhengzhou(ZS)andfuturessugarpricesinNewYork(NF).Theresultshowsthatthereisabi-directionalcausalitybetweenZFandZS,anunidirectionalcausalityfromNFtoZF,butnocausalitybetweenNFandZS.更多还原