The impact of geopolitical risk on stock returns: Evidence from inter-Korea geopolitics

Jung, Seungho and Lee, Jongmin and Lee, Seohyun (2021): The impact of geopolitical risk on stock returns: Evidence from inter-Korea geopolitics.

Abstract

We investigate how corporate stock returns respond to geopolitical risk in the case of South Korea, which has experienced large and unpredictable geopolitical swings that originate from North Korea. To do so, a monthly index of geopolitical risk from North Korea (the GPRNK index) is constructed using automated keyword searches in South Korean media. The GPRNK index, designed to capture both upside and downside risk, corroborates that geopolitical risk sharply increases with the occurrence of nuclear tests, missile launches, or military confrontations, and decreases significantly around the times of summit meetings or multilateral talks. Using firm-level data, we find that heightened geopolitical risk reduces stock returns, and that the reductions in stock returns are greater especially for large firms, firms with a higher share of domestic investors, and for firms with a higher ratio of fixed assets to total assets. These results suggest that international portfolio diversification and investment irreversibility are important channels through which geopolitical risk affects stock returns.

• Item Type: MPRA Paper
• Language: English
• Keywords: Geopolitical risk, Textual analysis, Stock returns, Inter-Korean relations
• Subjects: D - Microeconomics > D8 - Information, Knowledge, and Uncertainty > D80 - General; G - Financial Economics > G1 - General Financial Markets > G10 - General; H - Public Economics > H5 - National Government Expenditures and Related Policies > H56 - National Security and War

References

Arellano, C., Y. Bai, and P. J. Kehoe (2012), “Financial frictions and fluctuations in volatility,” Federal Reserve Bank of Minneapolis Research Department Staff Report, No. 466.

Baker, M., and J. Wurgler (2006), “Investor sentiment and the cross-section of stock returns,” Journal of Finance, 61(4), 1645–1680.

Baker, M., and J. Wurgler (2007), “Investor sentiment in the stock market,” Journal of Economic Perspectives, 21(2), 129–151.

Baker, S. R., N. Bloom, and S. J. Davis (2016), “Measuring economic policy uncertainty," The Quarterly Journal of Economics, 131(4), 1593-1636.

Berkman, H., B. Jacobsen, and J. B. Lee (2011), “Time-varying rare disaster risk and stock returns," Journal of Financial Economics, 101(2), 313-332.

Bloom, N., S. Bond and J. Van Reenen (2007), “Uncertainty and investment dynamics,” The Review of Economic Studies, 74(2), pp.391–415.

Bloom, Nicholas (2014), “Fluctuations in uncertainty,” Journal of Economic Perspectives, 28(2), pp. 153-76

Byun, S.J. and Jo, S., (2018), “Heterogeneity in the dynamic effects of uncertainty on investment.” Canadian Journal of Economics/Revue canadienne d'économique, 51(1), pp.127-155.

Caldara, Dario and Matteo Iacoviello (2019), “Measuring geopolitical risk,” International Finance Discussion Papers 1222.

Choe, H., B. Kho, and R. Stulz (2005), “Do domestic investors have an edge? The trading experience of foreign investors in Korea,” Review of Financial Studies, 18(3), 795-829.

De Santis, G., and B. Gerard (1997) “International asset pricing and portfolio diversification with time-varying risk,” The Journal of Finance, 52(5), 1881–1912.

Dibboglu, Sel and E. I. Cevik (2016), “The effect of North Korean threats on financial markets in South Korea and Japan,” Journal of Asian Economics, 43(1), pp.18-26.

Dixit, A., and Robert S. Pindyck (1994), Investment under uncertainty, Economics Books, New Jersey: Princeton University Press.

French, K. R., Schwert, G., & Stambaugh, R. F. (1987). “Expected stock returns and volatility,” Journal of Financial Economics, 19 (1), 3-29.

Gerlach, J. R., and Y. Yook (2016), “Political conflict and foreign portfolio investment: Evidence from North Korean attacks,” Pacific-Basin Finance Journal 39, pp. 178–196.

Gilchrist, S., J. W. Sim, and E. Zakrajek (2014), “Uncertainty, financial frictions, and investment dynamics,” NBER Working Paper, No. w20038, National Bureau of Economic Research.

Ghosal, V. and Loungani, P. (2000), “The differential impact of uncertainty on investment in small and large businesses,” Review of Economics and Statistics, 82(2), pp.338-343.

Gulen, H., and Mihai Ion (2016), “Policy uncertainty and corporate investment,” Review of Financial Studies, 29(3), pp.523-64.

Ha, Jong-Rim, Seo-Hyun Lee, and In-Hwan So (2018), “Identifying uncertainty shocks due to geopolitical swings in Korea,” Bank of Korea Working Paper 2018-26.

Hau, Harald (2001), “Location matters: An examination of trading profits,” The Journal of Finance, 56(5), pp.1959-83.

Haugen, Robert A., Talmor, Eli, and Torous, Walter N. (1991) "The effect of volatility changes on the level of stock prices and subsequent expected returns," The Journal of Finance,. 46(3), pages 985-1007.

Huh, In, and Ju-Hyun Pyun (2018), “Does nuclear uncertainty threaten financial markets? The attention paid to North Korean nuclear threats and its impact on South Korea's financial markets,” Asian Economic Journal, 32(1), pp.55-82.

Kang, Jun-Koo, and Rene M. Stulz (1997), “Why is there a home bias? An analysis of foreign portfolio equity ownership in Japan”, Journal of Financial Economics, 46(1), 3-28.

Kim, B-Y., and Gerard Roland (2014), “How credible is the North Korean threat?”, Economics of Transition, 22(3), 433-459.

Kim, Hyunseob, and Howard Kung (2017), “The Asset Redeployability Channel: How Uncertainty Affects Corporate Investment”, The Review of Financial Studies, 30(1), pp. 245-280.

Kim, Y.H., and H. Jung (2014) “Investor trading behavior around the time of geopolitical risk events: Evidence from South Korea,” Bank of Korea Working Paper 2014-10.

Kim, Young-Sik, Keun-Jae Park and Oh-Byung Kwon (2019), “Geopolitical risk and trading patterns of foreign and domestic investors: Evidence from Korea,” Asian-Pacific Journal of Financial Studies, 48, 269-298.

Park, Cheol-Beom., and Su-Yeon Park (2020), “Rare disaster risk and exchange rates: An empirical investigation of South Korean exchange rates under tension between the two Koreas”, Finance Research Letters, 36, Article No.101314.

Solnik, Bruno H. (1974), “Why not diversify internationally rather than domestically?” Financial Analyst Journal, 30(4), 48–54.

Suh, Sangwon (2007), “The influence of foreigners’ stock investment on Korean stock prices and its implications”, Bank of Korea Economic Papers, Vol.9, No.2.