The Relationship Between Stock Prices and Inflation in Qatar.

Abstract

The relationship between stock prices and inflation has remained one of the most debated issues in financial economics, with classical theory suggesting that equities provide a natural hedge against inflation through a positive long-run relationship. However, empirical findings across countries have frequently challenged this proposition, particularly in emerging and resource-dependent economies. This study investigates the dynamic relationship between stock prices and inflation in Qatar, a unique economy characterized by substantial hydrocarbon dependence, a fixed exchange rate pegged to the United States Dollar, and a relatively concentrated equity market. Quarterly data covering the period from 2005 to 2025 (84 observations) are analyzed using a comprehensive time-series econometric framework comprising Vector Autoregression (VAR), Johansen cointegration analysis, Vector Error Correction Model (VECM), and Autoregressive Distributed Lag (ARDL) bounds testing. Prior to estimation, stationarity, serial correlation, and heteroskedasticity diagnostics are performed using Augmented Dickey–Fuller (ADF), Kwiatkowski–Phillips–Schmidt–Shin (KPSS), Breusch–Godfrey LM, and White tests to ensure model reliability. The empirical findings reveal a statistically significant negative impact of inflation on stock returns, with the VAR(4) model identifying a significant fourth-quarter inflation effect (β = −1.2627, p < 0.001), indicating that inflationary shocks reduce stock market performance with a delayed transmission mechanism. The enhanced VAR specification demonstrates considerably greater explanatory power (R² = 0.387) than the baseline model (R² = 0.142). Forecast Error Variance Decomposition further indicates that oil price shocks account for 68.42% of inflation variability by the fourth forecast horizon, highlighting the central role of energy markets in Qatar’s macroeconomic dynamics. Johansen cointegration and VECM results confirm a stable long-run equilibrium relationship between the variables. Overall, the findings reject the Fisher hypothesis for Qatar and instead support the proxy hypothesis, suggesting that inflation functions as a macroeconomic risk factor rather than an effective hedge for equity investors, with important implications for portfolio management, monetary policy, and financial market stability...