With the development of China's stock market, emotions play an important role in stock price fluctuations. This paper selects the monthly data of the investor sentiment composite index and the closing price of the CSI 300 Index from January 2017 to November 2022, uses the least squares method to study the long-term and short-term relationship between investor sentiment and stock market prices, and then analyzes the dynamic relationship between the two based on the VAR model by using the impulse response function. The study found that investor sentiment and stock market prices have a stable equilibrium relationship in the short and long term, and in the short term, the two will produce a positive impact on each other, but this positive impact will not last long.

Senyun Chen. Investor sentiment and stock prices. Academic Journal of Business & Management (2023) Vol. 5, Issue 22: 105-116. https://doi.org/10.25236/AJBM.2023.052215.

[1] Xiao Qi, Shen Huayu. Media attention, investor heterogeneous belief and stock price synchronization [J]. Finance and Trade Research, 2021, 32 (10): 99-110. 

[2] Liu Eping, Mo Fan. Media attention: Information effect or the hype effect? [J]. Journal of Xi'an Jiaotong University (Social Science Edition), 2022, 42 (03): 141-152. 

[3] Luo Huan, Ma Xinsong. A Study on the Relationship between Investor sentiment and stock price movements [J]. China Management Informatization, 2022, 25 (01): 124-127. 

[4] Wang Li, Yao Yuqing. Research on the Development Trend of China's Stock market based on the perspective of investor sentiment and stock prices [J]. Journal of Science, 2021, 41 (08): 15-21. 

[5] Yi Zhigao, Mao Ning. Measurement of investor sentiment in China: The Construction of CICSI [J]. Financial Research, 2009 (11): 174-184. 

[6] Ma Yong, Yang Wenwei, Jiang Yiqing. How does investor sentiment affect companies' share prices? [J]. Financial Forum, 2020, 25 (5): 57-67. 

[7] Li Xiang, Tian Lu, Wang Qian, et al. Research on the impact of investor sentiment on stock investment returns [J]. Practice and understanding of mathematics, 2020, 50 (18): 258-268. 

[8] Li Yuan, Wu Feifei. Study on the price difference of investor sentiment trait risk and A + H shares [J]. Research on Financial Regulation, 2020 (12): 50-63. 

[9] Zhang Derong, Yu Pan. An investigation on investor sentiment indicator construction [J]. Cooperative Economy and Technology, 2019 (5): 67-69. 

[10] Yao Yuan, Zhong Qi, Yao Beibei. Research on the relationship between investor sentiment and stock market volatility—Based on the relationship between noise trading and irrational volatility of stock market price [J]. Price theory and Practice, 2019(02): 92-95. DOI: 10. 19851/j. cnki. Cn 11-1010/f. 2019. 02. 026. 

[11] Wang Chun, Zhang Wei. Research review on the impact of investor sentiment on the stock market [J]. Financial Theory and Practice, 2012 (08): 98-102. 

[12] Zhang Jihai. The impact of investor sentiment on stock prices from the perspective of behavioral economics [J]. Social Science Front, 2019 (12): 235-239.