Jindal, K. 2026. COVID-19 as a Structural Break in Indian Stock Market Volatility: An ARIMAX–Interrupted Time Series Analysis of the NIFTY 50 (2013–2024). International Journal of Social Science Research and Review. 9, 3 (Feb. 2026), 409-419. DOI:https://doi.org/10.47814/ijssrr.v9i3.3315.