複選題
15. Which one of the following statements is true?
(A) Highly positive serial correlations are indicators of market efficiency.
(B)Abnormal returns limited to the announcement date are indicators of
market inefficiency.
(C)Studies seem to indicate stock markets are semistrong but not strong
form efficient.
(D)Insider trading does not offer any advantages if the financial markets
are weak form efficient.
(E) The mutual funds do not outperforming the market. This supports
weak form efficient.
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