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Inanexternallyefficientmarket,informationisquicklyandwidelydisseminated,therebyallowingeachsecurity'spricetoadjustrapidlyinanunbiased ...,Theefficient-markethypothesis(EMH)isahypothesisinfinancialeconomicsthatstatesthatassetpricesreflectallavaila...。參考影片的文章的如下: