IMPACT OF INFLATION ON STOCK MARKET PERFORMANCE: A VECTOR AUTOREGRESSION APPROACH
Abstract
This study investigates the relationship between the inflation, as measured by Consumer Price Index (CPI), and the Nepalese stock market index, exploring both short-term and long-term dynamics. Using econometric tools such as the Vector Autoregressive (VAR) model and Johansen co-integration tests, including time series data, the study examines whether inflation has a significant impact on stock market performance in Nepal. The results reveal that there is no long-term relationship between CPI and the stock market index. It suggests that inflation does not lead to a sustained equilibrium or long-run connection with stock market performance. However, a significant short-term relationship is found, where higher inflation has a weak negative impact on the stock market index, indicating that rising inflation can pressure stock prices in the immediate term. Additionally, Granger causality tests show no clear causal direction between CPI and stock market movements, suggesting that while the two variables may move together in the short run, their relationship does not follow a direct cause-and-effect pattern. The study provides valuable insights for policymakers and investors, suggesting that a comprehensive approach addressing multiple economic factors is essential for stabilizing the stock market. Further research is recommended to explore additional variables and extend the analysis over a longer period to gain a deeper understanding of these dynamics.
References
Akaike, H. (1974). A new look at the statistical model identification. IEEE Transactions on Automatic Control, 19(6), 716–723. https://doi.org/10.1109/TAC.1974.1100705
Anjum, F., & Habib, B. (2025). Ekonomi. Journal of Ekonomi, 13(2024), 12–27.
Asaolu, T. O., Ogunmuyiwa, M. S., State, O., & State, O. (2011). An econometric analysis of the impact of macroecomomic variables on stock market movement in Nigeria. 3(1), 72–78. https://doi.org/https://www.airitilibrary.com/Article/Detail/20418752-201102-201508130016-201508130016-72-78
Bodie, Z., Kane, A., & Marcus, A. (2013). Ebook: Essentials of investments: Global edition. McGraw Hill.
Dahal, P., Puri, R., Dahal, P., & Budhathoki, B. (2024). An empirical assessment of factors impacting stock prices of Nepalese commercial banks. International Journal of Economics, Business and Management Research, 08(07), 46–60. https://doi.org/10.51505/ijebmr.2024.8704
Dickey, D. A., & Fuller, W. A. (1979). Distribution of the estimators for autoregressive time series with a unit root. Journal of the American Statistical Association, 74(366a), 427–431. https://doi.org/doi.org/10.1080/01621459.1979.10482531
Eldomiaty, T., Saeed, Y., Hammam, R., & AboulSoud, S. (2020). The associations between stock prices, inflation rates, interest rates are still persistent: Empirical evidence from stock duration model. Journal of Economics, Finance and Administrative Science, 25(49), 149–161. https://doi.org/10.1108/JEFAS-10-2018-0105
Engle, R. F., & Granger, C. W. J. (1987). Co-integration and error correction: Representation, and Testing. Econometrica: Journal of the Econometric Society, 55(2), 251–276.
Fama, E. F. (1981). Stock returns, real activity, inflation, and money. The American Economic Review, 71(4), 545–565. https://www.jstor.org/stable/1806180
Johansen, S. (1995). Likelihood-based inference in cointegrated vector autoregressive models. OUP Oxford.
Mohnot, R., Banerjee, A., Ballaj, H., & Sarker, T. (2024). Re-examining asymmetric dynamics in the relationship between macroeconomic variables and stock market indices: empirical evidence from Malaysia. The Journal of Risk Finance, 25(1), 19–34. https://doi.org/10.1108/JRF-09-2023-0216
Phillips, P. C. B., & Perron, P. (1988). Testing for a unit root in time series regression. Biometrika, 75(2), 335–346.
Poudel, R. B. (2019). Stock return and trading volume relation in Nepalese stock market: An ARDL approach. SEBON Journal-VIIMay, 46(12), 17. https://sebon.gov.np/uploads/uploads/X5rp6kG6JsAGPN7MvqHQ9YvEPF4MIeOmnRCwQ4SC.pdf#page=23
Pradhan, R. S., & Patna, B. (2019). Ownership structure, risk and performance in Nepalese banking sector. SEBON Journal, 7(May), 1–16. https://www.sebon.gov.np/uploads/uploads/X5rp6kG6JsAGPN7MvqHQ9YvEPF4MIeOmnRCwQ4SC.pdf#page=7
Schwarz, G. (1978). Estimating the dimension of a model The Annals of Statistics 6 (2), 461–464. URL: Http://Dx. Doi. Org/10.1214/Aos/1176344136.
Sengupta, S., Dutta, A., & Dutta, A. (2019). An empirical study of the effect of macro-economic factors on the stock market: An Indian perspective. Finance India, 33(1), 113–134.
Shahbaz, M., Rehman, I. U., & Afza, T. (2016). Macroeconomic determinants of stock market capitalization in an emerging market: fresh evidence from cointegration with unknown structural breaks. Macroeconomics and Finance in Emerging Market Economies, 9(1), 75–99. https://doi.org/10.1080/17520843.2015.1053820
Shanken, J., & Weinstein, M. I. (2006). Economic forces and the stock market revisited. Journal of Empirical Finance, 13(2), 129–144. https://doi.org/10.1016/j.jempfin.2005.09.001
Sims, C. A. (1980). Macroeconomics and reality. Econometrica: Journal of the Econometric Society, 1–48.
Suharsono, A., Aziza, A., & Pramesti, W. (2017). Comparison of vector autoregressive (VAR) and vector error correction models (VECM) for index of ASEAN stock price. AIP Conference Proceedings, 1913(January 2025). https://doi.org/10.1063/1.5016666
Thapa, K. B. (2023a). Examining the impact of GDP on the Nepalese stock market: Insights from Co-integration and Granger causality tests. Pravaha, 29(1), 192–199. https://doi.org/10.3126/pravaha.v29i1.71419
Thapa, K. B. (2023b). Macroeconomic Determinants of the Stock Market in Nepal: An Empirical Analysis. NCC Journal, 8(1), 65–73. https://doi.org/10.3126/nccj.v8i1.63087
Thapa, K. B. (2025). Macroeconomic determinants of stock index in the Nepalese capital market (Issue March). Tribhuvan University.
Thapa, K. B., & Chamlagain, G. P. (2025). Empirical analysis of macroeconomic determinants of stock market performance : Evidence from the Nepal stock exchange using an ARDL model. DRISHTIKON, 15(1), 89–97. https://doi.org/https://doi.org/10.3126/dristikon.v15i1.77123