This study investigates the short-run dynamic relationship between Brent crude oil prices and the stock returns of Korean Air and Air Busan by applying a Vector Autoregression model and impulse response analysis. The results show that oil-price shocks do not exert a statistically significant direct effect on the stock returns of either airline during the sample period. However, Korean Air exhibits a significant short-term reversal pattern, indicating that positive stock returns in one period may be followed by negative adjustments in the next period. Brent crude oil prices also display strong short-run persistence, as current movements are significantly influenced by their previous values. The impulse response results further indicate that oil-price shocks generate only weak and temporary responses in the two airline stocks, while shocks originating from the airlines do not significantly affect oil prices. These findings suggest that the impact of oil-price volatility may be partially absorbed by airline-specific risk-management strategies, pricing decisions, and investor expectations. The study provides preliminary evidence on the dynamic interaction between energy-market shocks and airline stock performance in South Korea.
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ABSTRACT Ⅰ. INTRODUCTION Ⅱ. Literature review 2.1 Cost Pass-through Theory 2.2 Oil price and aviation industry Ⅲ. Research method 3.1 Data Description 3.2 Empirical approach Ⅳ. Results 4.1 Results of Unit Root Test 4.2 VAR Model Analysis 4.3 Impulse Response Analysis Ⅴ. Discussion 5.1 Theoretical Implications 5.2 Practical Implications Ⅵ. Limitations and future research References