“Research on the Time-Varying Mechanism of Market Sentiment of Artificial Intelligence Industry Stocks Based on Multi-Factor PCA-HMM Framework”, J. Sci. Innov. Soc. Impact, vol. 1, no. 2, pp. 18–23, Dec. 2025, Accessed: Jan. 15, 2026. [Online]. Available: https://sagespress.com/index.php/JSISI/article/view/48