ABSTRACT

Stability of financial system has become very important not only for practitioners and policy makers but also for researchers, since lack of it can trigger to turmoil and bursts in global financial system. Besides, hazardous effects of financial instability states can quickly spread out globally thanks to financial connectedness and the last global financial crisis sets an example of this. Hence, there exist increasing number of studies in the literature which determine early warning indicators of financial instability states in order to avoid from their catastrophic effects into economy. In the light of this, empirical studies in the related literature constructed financial stress indexes in low frequency (weekly, monthly, quarterly or annually) or in high frequency (daily) in order to measure risks and fragilities of financial system. On the other hand, energy price shocks have detrimental effects into economies by different transmission channels due to energy dependency of emerging and developed countries. 1973 and 1979 oil price shocks set example of these effects since they harmfully affected both developed and emerging economies. Along with that, since oil usage consist of the greatest amount in total energy consumption, researchers investigated the impacts of oil price shocks on macro economies or financial systems of countries. In this study; in the first step, we identify systemic stress of financial systems of 9 countries (G-7, Norway and Turkey) with high frequency (daily) financial stress indexes which consists of daily financial market indicators. Graphical illustrations of financial stress indexes show that all indexes response effectively to well-known financial stress events. In the second step, the impacts of oil price shocks on financial stability are discussed for 9 net oil importer/exporter countries with an application of SVAR model. Finally, similarities/dissimilarities of impacts of oil price shocks on 9 net oil importer/exporter countries’ financial stabilities are analyzed.

MOTIVATION

RESEARCH QUESTIONS

CONTRIBUTION

LITERATURE REVIEW (DEFINITION OF FINANCIAL STABILITY)

LITERATURE REVIEW (EMPIRICAL STUDIES FOR FINANCIAL STRESS INDEXES)

High frequency (daily) financial stress index studies: Illing and Liu, 2006 (Canada); Holmfeldt et al, 2009 (Switzerland); Oet et al., 2011 (US); Lousiz and Vouldis, 2012 (Greece); Islami and Kurz-Kim, 2013 (17 countries in Euro area).

The indicators that are used in high frequency (daily) financial stress indexes are given in Table 1.

Table 1. High Frequency Financial Stress Index Indicators

Low frequency financial stress index studies:

Table 2. Weekly Financial Stress Index Indicators

The indicators that are used in monthly financial stress indexes are given in Table 3.

Table 3. Monthly Frequency Financial Stress Index Indicators

LITERATURE REVIEW (IMPACTS OF ENERGY PRICE SHOCKS ON FINANCIAL AND MACROECONOMIC INDICATORS)

METHODOLOGY (FINANCIAL STRESS INDEXES)

CISS is defined as below:

\[CISS_{t} = \sqrt{(w \circ s_{t})C_{t}(w \circ s_{t})^{'}}\] Where, \(w=(w_{1},w_{2},w_{3},w_{4},w_{5})\) is sub index weight vector, \(s_{t}=(s_{1},s_{2},s_{3},s_{4},s_{5})\) is sub-markets index vector, \(w \circ s_{t}\) is Hadamart product, \(C_{t}\) is the estimated correlation coefficients matrix \((\rho_{ij,t})\) across sub-market indexes i (i=1,2,3,4,5) and j (j=1,2,3,4,5) given as follows:

\[C_{t} = \begin{bmatrix} 1 & \rho_{12,t} & \rho_{13,t} & \rho_{14,t} & \rho_{15,t} \\ \rho_{21,t} & 1 & \rho_{23,t} & \rho_{24,t} & \rho_{25,t} \\ \rho_{31,t} & \rho_{32,t} & 1 & \rho_{34,t} & \rho_{35,t} \\ \rho_{41,t} & \rho_{42,t} & \rho_{43,t} & 1 & \rho_{45,t} \\ \rho_{51,t} & \rho_{52,t} & \rho_{53,t} & \rho_{54,t} & 1 \end{bmatrix}\]

Once the conditional correlations are estimated for each pair of sub-market indexes, the dynamic correlation coefficient matrix, ????_???? is constructed.

Finally, daily financial stress index (CISS) is obtained by the following equation:

\[CISS_{t} = \sqrt{(w \circ s_{t})C_{t}(w \circ s_{t})^{'}}\]

METHODOLOGY (IMPACTS OF OIL PRICE SHOCKS ON FINANCIAL STABILITY)

The structural shocks are defined to capture oil price changes, oil prices volatility changes and changes in financial stability/instability states with VAR model. As a consequence, we identify structural oil price shocks (oil price changes and oil prices volatility changes) and structural financial shocks. Therefore, the representation of SVAR model is given as follows:

\[B_{0}y_{t}=\beta+\sum_{i=1}^{p} \beta_{i}y_{t-i}+\epsilon_{t}\] where \(y_{t}\)???????? is (3×1) vector that includes financial stress index, daily oil price returns (logarithmic difference of oil prices) and daily oil prices volatility (obtained by \(GARCH(1,1)\), \(B_{0}\) is contemporaneous coefficient matrix, \(\beta\)???? is vector of constant terms and \(\epsilon_{t}\)???? represents vector of serially and mutually uncorrelated error terms (structural shocks).

Therefore, structural shocks can be estimated by the following reduced form errors:

\[e_{t}=B_{0}^{-1}\epsilon_{t}\] The reduced-form VAR can be obtained as follows:

\[\begin{bmatrix} u_{1t} \\ u_{2t} \\ u_{3t} \end{bmatrix} = \begin{bmatrix} 1 & 0 & 0 \\ b_{21} & 1 & 0 \\ b_{31} & b_{32} & 1 \end{bmatrix} \times \begin{bmatrix} \epsilon_{financial shock} \\ \epsilon_{oil price shock} \\ \epsilon_{oil price volatility shock} \end{bmatrix}\]

SVAR is estimated by using 30 lags of each variable to determine potential long run impacts of oil price shocks on financial stability.

DATA

The indicators that are used financial stress indexes are given in Table 4.

Table 4. Financial Stress Index Indicators

FINANCIAL STRESS INDEXES OF TURKEY, THE U.S. AND GERMANY

In this section, the financial stress indexes of Turkey, the U.S. and Germany are given

WELL-KNOWN FINANCIAL STRESS EVENTS

Well-known financial stress events are given below:

FINANCIAL STRESS INDEX OF TURKEY AND WELL-KNOWN FINANCIAL STRESS EVENTS

Daily financial stability for Turkey is measured by a financial stress index which is developed with an application of dynamic conditional correlation based CISS method. Next figure illustrates financial stress index for Turkey from 01/11/2005 to 11/17/2016.

Figure 1. Financial Stress Index of Turkey and Well-Known Financial Stress Events

FINANCIAL STRESS INDEX OF THE U.S. AND WELL-KNOWN FINANCIAL STRESS EVENTS

Daily financial stability for the U.S. is measured by a financial stress index which is developed with an application of dynamic conditional correlation based CISS method. Next figure illustrates financial stress index for the United States from 01/10/1993 to 11/18/2016.

Figure 2. Financial Stress Index of the U.S. and Well-Known Financial Stress Events

FINANCIAL STRESS INDEX OF THE GERMANY AND WELL-KNOWN FINANCIAL STRESS EVENTS

Daily financial stability for Germany is measured by a financial stress index which is developed with an application of dynamic conditional correlation based CISS method. Next figure illustrates financial stress index for Germany from 09/06/2004 to 11/29/2016.

Figure 3. Financial Stress Index of Germany and Well-Known Financial Stress Events

Dynamics of 9 Financial Stress Indexes from 2007/03/17 through 2016/11/17

THE IMPACTS OF OIL PRICE SHOCKS ON FINANCIAL STABILITY

Toda-Yamamoto approach is implemented in order to determine mean spillovers between the series.

DYNAMICS OF FSIS, OIL PRICES AND OIL PRICES VOLATILITY FROM 2007/03/17 THROUGH 2016/11/17

Dynamics of Financial Stress Indexes, Oil Prices and Oil Prices Volatility from 2007/03/17 to 2016/11/17

CORRELATION STRUCTURE OF FSIs, OIL PRICE AND OIL PRICES VOLATILITY (FROM 2007/03/19 THROUGH 2016/11/17)

CORRELATION STRUCTURE OF FSIs, OIL PRICES AND OIL PRICES VOLATILITY IN GLOBAL FINANCIAL CRISIS PERIOD (FROM 2007/08/01 THROUGH 2009/12/31)

TODA-YAMOMOTO TEST RESULTS

SVAR IMPULSE RESPONSES

CONCLUSIONS

*There exist an increasing trend in all financial stress indexes during the last global financial crisis period (08/2007-12/2009). And, all financial stress indexes reach their peak values during 2008 financial crisis.

REFERENCES