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Systemic Co-Jumps
(2016-10-10)
The simultaneous occurrence of jumps in several stocks can be associated with major financial news, triggers short-term predictability in stock returns, is correlated with sudden spikes of the variance risk premium, and ...
The Impact of Network Connectivity on Factor Exposures, Asset Pricing and Portfolio Diversification
(2016-10-01)
We show that property damages from weather-related natural disasters significantly weaken the stability of banks with business activities in affected regions, as reflected in lower z-scores, higher probabilities of default, ...
Systemic risk for financial institutions of major petroleum-based economies: The role of oil
(2017-11-05)
This paper examines the relationship between oil price movements and systemic risk of many financial institutions in major petroleum-based economies. We estimate ?CoVaR for those institutions and thereby observe the presence ...
A Modern Take on Market Efficiency: The Impact of Trump’s Tweets on Financial Markets
(2021-05-06)
We focus on the role of social media as a high-frequency, unfiltered mass information transmission channel and how its use for government communication affects the aggregate stock markets. To measure this effect, we ...
Market impact of government communication: The case of presidential tweets
(2021-10-06)
"We propose the ""President reacts to news"" channel of stock returns by studying the financial market impact of the Twitter account of the 45th president of the United States, Donald Trump. We use machine learning algorithms ...
Time-varying granger causality tests for applications in global crude oil markets: A study on the DCC-MGARCH Hong test
(2021-10-14)
Analysing causality among oil prices and, in general, among financial and economic variables is of central relevance in applied economics studies. The recent contribution of Lu et al. (2014) proposes a novel test for ...