Information Feedback in Temporal Networks as a Predictor of Market Crashes
Stjepan Begušić, Zvonko Kostanjčar, Dejan Kovač, Boris Podobnik, H. Eugene Stanley
Complexity,
September
2018
Abstract
In complex systems, statistical dependencies between individual components are often considered one of the key mechanisms which drive the system dynamics observed on a macroscopic level. In this paper, we study cross-sectional time-lagged dependencies in financial markets, quantified by nonparametric measures from information theory, and estimate directed temporal dependency networks in financial markets. We examine the emergence of strongly connected feedback components in the estimated networks, and hypothesize that the existence of information feedback in financial networks induces strong spatiotemporal spillover effects and thus indicates systemic risk. We obtain empirical results by applying our methodology on stock market and real estate data, and demonstrate that the estimated networks exhibit strongly connected components around periods of high volatility in the markets. To further study this phenomenon, we construct a systemic risk indicator based on the proposed approach, and show that it can be used to predict future market distress. Results from both the stock market and real estate data suggest that our approach can be useful in obtaining early-warning signals for crashes in financial markets.
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06.09.2018 • 17/2018
The Cyclical upswing in Germany continues, in spite of foreign demand losing momentum
In autumn 2018, the global economy continues to expand quite strongly. Whereas the cyclical upswing in the USA has gained even more strength, the economy in the Euro area has weakened somewhat. To a lesser extent, this also applies to the German economy. “According to this forecast, the growth rate of German real gross domestic product will be 1.8% in 2018 and 1.7% in 2019. The East German economy will expand by 1.5% this year and by 1.4% in 2019”, says Oliver Holtemöller, head of the Department Macroeconomics and vice president at IWH.
Oliver Holtemöller
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Kommentar: 30 Jahre DAX
Reint E. Gropp
Wirtschaft im Wandel,
No. 3,
2018
Abstract
Gerade ist der Deutsche Aktienindex DAX 30 Jahre alt geworden, und es gibt viel zu feiern. Preisbereinigt hätte ein Investment von 1 000 Euro, angelegt am DAX-Eröffnungstag 1. Juli 1988, heute einen Wert von über 6 000 Euro, hätte sich also versechsfacht!
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Market Power and Risk: Evidence from the U.S. Mortgage Market
Carola Müller, Felix Noth
Economics Letters,
2018
Abstract
We use mortgage loan application data of the Home Mortgage Disclosure Act (HMDA) to shed light on the role of banks’ market power on their presumably insufficient risk screening activities in the U.S. mortgage market in the pre-crisis era. We find that banks with higher market power protect their charter value. The effect is stronger for banks that have more information about local markets.
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Banks Fearing the Drought? Liquidity Hoarding as a Response to Idiosyncratic Interbank Funding Dry-ups
Helge Littke, Matias Ossandon Busch
IWH Discussion Papers,
No. 12,
2018
Abstract
Since the global financial crisis, economic literature has highlighted banks’ inclination to bolster up their liquid asset positions once the aggregate interbank funding market experiences a dry-up. To this regard, we show that liquidity hoarding and its detrimental effects on credit can also be triggered by idiosyncratic, i.e. bankspecific, interbank funding shocks with implications for monetary policy. Combining a unique data set of the Brazilian banking sector with a novel identification strategy enables us to overcome previous limitations for studying this phenomenon as a bankspecific event. This strategy further helps us to analyse how disruptions in the bank headquarters’ interbank market can lead to liquidity and lending adjustments at the regional bank branch level. From the perspective of the policy maker, understanding this market-to-market spillover effect is important as local bank branch markets are characterised by market concentration and relationship lending.
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19.04.2018 • 7/2018
Joint Economic Forecast Spring 2018: Germany’s Economic Experts Raise Forecast Slightly
Berlin, 19 April – Germany’s leading economic experts raised their forecasts for 2018 and 2019 slightly in their Spring Joint Economic Forecast released on Thursday in Berlin. They now expect economic growth of 2.2 percent for this year and 2.0 percent for 2019, versus 2.0 percent and 1.8 percent respectively in their autumn forecast. “The German economy is still booming, but the air is getting thinner as unused capacities are shrinking“, notes Timo Wollmershaeuser, ifo Head of Economic Forecasting. Commenting on the new German government’s economic policy, he adds: “It is precisely when the government’s coffers are full that fiscal policy should reflect the implications of its actions for overall economic stability and the sustainability of public finances. The extension of statutory pension benefits outlined in the coalition agreement runs counter to the idea of sustainability.”
Oliver Holtemöller
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21.03.2018 • 5/2018
What is holding back the banking union?
The European Commission wants to better regulate and monitor the European banking sector. In many EU Member States, however, the necessary directives are being implemented extremely slowly. Surprisingly, the reasons for this do not lie in politics and banking structures, but in the institutional framework conditions and existing regulations in the Member States, as argued by Michael Koetter, Thomas Krause and Lena Tonzer from the Halle Institute for Economic Research (IWH).
Michael Koetter
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15.03.2018 • 3/2018
Consistently strong economy, but risks are increasing
The global upswing continues in 2018. The German economy is cur-rently in a boom and is increasingly coming up against capacity limits. “According to our forecast, gross domestic product will expand by 2.2% in 2018; the general government surplus will amount to 1.1% in relation to gross domestic product. Economic growth in East Germany is likely to be slightly below the German growth rate”, says Oliver Holtemöller, head of the Department Macroeconomics and IWH vice president.
Oliver Holtemöller
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