ABSTRACT
This paper probes the relationship between geopolitical risks (GPR), WTI oil, and gold prices utilizing the time-varying causality and quantile regression approaches. The sample period spans from January 1986 to January 2022, comprising 433 monthly observations and representing the longest common period of data availability. The results show that there is no causality between the pairs of GPR–WTI, and GPR–gold prices for the full sample period, while the causality between gold and WTI is unidirectional, running from gold to WTI. Using the rolling causality test, however, the findings show that the dynamic causal relations strengthen over time. The Granger causality from the gold prices to GPR and WTI is stronger than the other way around, suggesting that the gold market dominates the other two variables in terms of strength of the lead-lag structure of causality. Besides, the findings reveal the strongest causation effects between GPR and WTI spot prices. Before 2009, the causal relationship between WTI and GPR is mostly unidirectional while also a bidirectional linkage emerges, coinciding with the crisis periods including the Dot-Com and 2007 US Subprime crises. During the causal periods, these variables respond negatively to changes in others. For the COVID19 period, the direction of causality considerably changes in favor of WTI for the GPR–WTI pair whereas it is unchanged for the WTI–gold pair. The results indicate that WTI has positive and negative predictive powers for GPR and gold while it receives negative and positive causation effects from GPR and gold during the pandemic, respectively. The results, in overall, may offer important insights for investors and regulatory authorities in building portfolio and risk management strategies as well as pricing and trading activities and constructing monetary policies over various market conditions. Copyright © 2022 Erkan Kara, Remzi Gökb. Published by Vilnius University Press.
ABSTRACT
This paper explores the relationship between inflation expectations and gold returns of monthly and annual maturities in Turkey from 2006 to 2020 with 177 monthly observations through the application of wavelet cohesion and causality tests. The findings reveal significantly negative cohesion in the short term and significantly positive cohesion in the long term, indicating that the hedging ability of gold prices exists only in the long term during crisis periods. Therefore, the findings provide evidence for the validity of the expected inflation effect hypothesis in Turkey. The ordinary least squares results, on the other hand, show that the ongoing COVID-19 pandemic is the most prominent factor in the movement of inflation and gold at all wavelet scales for the two types of maturities. The continuous wavelet transformation based Granger-causality test provides little evidence for out-of-phase and unidirectional causality running from the inflation expectations to gold returns in the higher and medium frequency bands. Furthermore, the QQR results show an asymmetrical impact on each other-implying a hedging effectiveness of gold against inflation expectations-and reveal that its size and magnitude change significantly under different economic conditions and data frequencies. The results have significant implications for portfolio and risk management during normal market conditions as well as hedging and speculation activities during crises in short term and long term periods, respectively.
ABSTRACT
We study the relationship between weekly and monthly observations of CDS, interest, and exchange rates (USDTRY) during 2005-2020 in Turkey. The findings suggest a positive relationship between the variables. The bivariate Granger Coherence approach indicates that the dynamic causal and reverse causal interactions mainly intensify in the short- and intermediate-term. Using a bootstrap time-varying causality approach with a fixed size of 37 weeks, the casual linkages are strong but not homogenous in both non-crisis and crisis periods. There is also a unidirectional causality running from interest rates to foreign exchange rates during the period of COVID-19, yielding important implications for investors and policymakers.