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On the construction of common size, value and momentum factors in international stock markets : a guide with applications
Schmidt, Peter S.; Arx, Urs von; Schrimpf, Andreas; … - 2011
A major obstacle for research in international asset pricing and corporate finance has been a lack of reliable and publicly available data on international common risk factors and portfolios. To address this gap, we provide a step-by-step description of how appropriately screened data from...
Persistent link: https://www.econbiz.de/10008798062
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Excess financial volatility explained by endogenous excitations revealed by EM calibrations of a generalized Hawkes point process
Wehrli, Alexander; Sornette, Didier - 2021
this paper, we offer an explanation for one of these anomalies, the “excess volatility puzzle”, i.e. the observation that … inefficient) excess component. The endogenously induced excess volatility is found to be substantial, largely stable at longer … time scales and thus provides a plausible ex-planation for the excess volatility puzzle. Furthermore, strong endogenous …
Persistent link: https://www.econbiz.de/10012518955
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The endo-exo problem in high frequency financial price fluctuations and rejecting criticality
Wheatley, Spencer; Wehrli, Alexander; Sornette, Didier - 2018
The endo-exo problem lies at the heart of statistical identi fication in many fields of science, and is often plagued by spurious strong-and-long memory due to improper treatment of trends, shocks and shifts in the data. A class of models that has shown to be useful in discerning exogenous and...
Persistent link: https://www.econbiz.de/10011900335
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Scale-, time- and asset-dependence of Hawkes process estimates on high frequency price changes
Wehrli, Alexander; Wheatley, Spencer; Sornette, Didier - 2020
The statistical estimate of the branching ratio η of the Hawkes model, when fitted to windows of mid-price changes, has been reported to approach criticality (η = 1) as the fitting window becomes large. In this study -- using price changes from the EUR/USD currency pair traded on the...
Persistent link: https://www.econbiz.de/10012219363