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QFII持股对股票收益波动性影响研究——以我国证券市场为例 摘要 本文通过研究QFII(合格境外机构投资者)持股对股票收益波动性的影响,以我国证券市场为例,探讨了QFII在我国证券市场的重要性。本文使用2010年至2019年的日常交易数据,采用多元回归分析法和ARCH模型,研究了QFII持股比例对股票收益波动性的影响。 研究结果表明,QFII持股比例和股票收益率之间具有正相关关系,但在控制其他因素的情况下,对股票收益波动性的影响不显著。然而,在使用ARCH模型进行进一步分析时,发现QFII持股比例对股票波动性具有显著影响。同时,本文还研究了QFII行业分布对股票波动性的影响,并探讨了QFII持股比例和股价间的关系。最后,我们得出结论:QFII持股对股票收益波动性具有显著影响,这对于我国证券市场的稳定性和发展具有重要意义。 关键词:QFII持股,股票收益,波动性,多元回归,ARCH模型,行业分布 Abstract ThisstudyexplorestheimpactofQualifiedForeignInstitutionalInvestor(QFII)holdingonstockmarketvolatilityinChina.Usingdailytradingdatafrom2010to2019,weemploymultipleregressionanalysisandARCHmodeltoexaminetherelationshipbetweenQFIIholdingandstockmarketreturnsvolatility. TheresultsrevealapositivecorrelationbetweenQFIIholdingsandstockreturns,buttheimpactonstockmarketvolatilityisinsignificantaftercontrollingforotherfactors.However,theARCHmodelanalysisindicatesthatQFIIholdinghasasignificanteffectonstockvolatility.Inaddition,weinvestigatetheimpactoftheindustrialdistributionofQFIIholdingsonstockvolatilityandtherelationshipbetweenQFIIholdingandstockprices. WeconcludethatQFIIholdinghasasignificantimpactonstockmarketvolatility,whichisimportantforthestabilityanddevelopmentofChina'ssecuritiesmarket. Keywords:QFIIholdings,stockreturns,volatility,multipleregression,ARCHmodel,industrialdistribution Introduction AsChina'ssecuritiesmarkethasgraduallyopeneduptoforeigninvestors,QualifiedForeignInstitutionalInvestors(QFII)havebecomeanimportantgroupofparticipants.QFIIreferstoqualifiedforeigninstitutionalinvestorswhoareallowedtoinvestinChina'sstockmarketwithincertainquotasandregulatoryrequirements.QFII'sentryintothemarkethasgreatlyenrichedtheliquidityofthemarketandplayedanimportantroleinpromotingChina'sfinancialopennessanddevelopment. QFIIholdingshavebothpositiveandnegativeeffectsonthestockmarket.Ontheonehand,QFIIholdingscanimprovetheliquidityofthestock,expandtheinvestorbase,andenhancethepricediscoveryfunctionofthemarket.Ontheotherhand,large-scaleQFIIholdingscanalsocausefluctuationsinthe