Size Effect
Size Effect
Size Effect
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• Hypothesis:<br />
Abnormal Returns in<br />
Small Firm Portfolios<br />
– CAPM implies that any two assets with the same beta<br />
will have the same expected return.<br />
– Mean abnormal returns are zero.<br />
– According to CAPM, mean abnormal returns should be<br />
zero because all the portfolios have betas near one,<br />
which should approximate the return of the market as a<br />
whole.