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Erscheinungsjahr: 
2021
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[Journal:] Journal of Risk and Financial Management [ISSN:] 1911-8074 [Volume:] 14 [Issue:] 6 [Publisher:] MDPI [Place:] Basel [Year:] 2021 [Pages:] 1-22
Verlag: 
MDPI, Basel
Zusammenfassung: 
Financial crises, such as the Great Financial Crisis of 2007-2009 and the COVID-19 Crisis of 2020-2021, lead to high volatility in financial markets and highlight the importance of the debate on the Efficient Markets Hypothesis, a corollary of which is that in an efficient market it should not be possible to systematically make excess returns. In this paper, we discuss a new empirical measure - Excess Trading Returns - that distinguishes between market and trading returns and that can be used to measure inefficiency. We define an Inefficiency Matrix that can provide a complete, empirical characterization of the inefficiencies inherent in a market. We illustrate its use in the context of empirical data from a pair of model markets, where information asymmetries can be clearly understood, and discuss the challenges of applying it to market data from commercial exchanges.
Schlagwörter: 
behavioural finance
efficient market hypothesis (EMH)
excess trading returns
investor's behaviour
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