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1、Preface‘‘Thisisatimely—andexciting—book.Thetechnologyofextractingfinancialsentimentfromnewsfeedsandothersuchsourcesisonethathasbeenslowlygrowing,supportedbytheacceleratinginfrastructureprovidedbytheworldwideweb.Overthepasttenyearsorso,papershavebeenappearingshowingthat
2、usefulinformationcanbeextractedinthisway.Moreover,onecanlegitimatelyexpecttherateofprogresstogatherpace,asothersupportingwebtechnologiescontinuetodevelop.Thisbookisthefirsttoprovideacomprehensiveoverviewofthestateoftheart.Itwillattractalotofattention.Fromatechnicalpers
3、pective,theareapresentssomedeepandinterestingchallenges,whicharenicelycapturedhere.Oneisthecentralissueoffusingentirelydifferentkindsofinformation,fromquitedistinctsources,andwithverydifferentdegreesofreliability.Anotherisanissuewhichminingoflargeobservationaldatasetsha
4、stocontendwith,whateveritsareaofapplication,namelytheproblemofselectionbias:itisalltooeasytoextractadistorted,non-representativedataset,sothatanyanalysesbasedonitareatriskofmistakenconclusions.Overall,thistechnologyisstillinitsinfancy,butthepaperspresentedinthisvolume
5、provideaperfectlaunchpadforthefutureofnewsanalyticsinfinance.Justassocialstatisticsenablesusbothtodefineandmeasuretheaggregatephenomenathatdefinesociety,sotheworkdescribedinthisvolumewillenableustodiscernandquantifytheforceswhichsteerfinancialmarkets.’’ProfessorDavidJ.Han
6、d,ProfessorofStatistics,ImperialCollege,London;ChiefScientificAdvisor,WintonCapitalManagement;andPresident,RoyalStatisticalSociety‘‘Thiscuttingedgecollectionofwritingsoffersimportantinsightsintotheconnectionbetweennewsanalyticsandsentimentthatarerich,deep,andsystematic.
7、Investorsandacademicsalikehavemuchtolearnfromreadingthisfascinatingbook.’’HershShefrin,MarioL.BelottiProfesssorofFinance,SantaClaraUniversity,LeaveySchoolofBusiness‘‘Stopthepress!Atlast,wehaveasubstantivebookonfinancialnews.Thisscholarlytreatisereacheswaybeyondhowtorea
8、dthestockpagestoprovidemoderninsightsontherelationshipbetweennewsandpriceformation.’’PeterCarr,GlobalHeadofMarketModeling,Mo
