ISSN: 2056-3736 (Online Version) | 2056-3728 (Print Version)
Tzu-Pu Chang, Yu-Wei Chan and Ping-Huang Wang
Correspondence: Tzu-Pu Chang, changtp@yuntech.edu.tw
Department of Finance, National Yunlin University of Science and Technology, Taiwan.
pdf (426.22 Kb) | doi: https://doi.org/10.47260/bae/1027
The existing literature have used media messages as a proxy variable for investor sentiment, but they mainly classify sentiment into positive or negative categories based on the words used in news articles, without much attention to the degree of affirmative or doubtful conveyed by the words used. Thus, in addition to classifying news content into positive or negative sentiment, this study also measures the degree of affirmative or doubtful expressed in the news articles in order to achieve more accurate predictive results. The study converts qualitative text to two quantitative scores (sentiment ratio and affirmative ratio) and investigates the predictive ability of these two variables on stock index returns and volatility in Taiwan’s case. The empirical findings indicate that only affirmative ratio exhibits a significant and negative impact on the one-day ahead returns of the Taiwan Stock Exchange Capitalization Weighted Stock Index (TAIEX) and the Taiwan Stock Exchange Index Futures (FITX). Additionally, the volatility of returns in both future and spot markets is significantly influenced by both sentiment ratio and affirmative ratio.
Investor sentiment, Text-mining, TAIEX, FITX, Affirmative ratio.
Audrino, F., Sigrist, F. and Ballinari, D. (2020). The Impact of Sentiment and Attention Measures on Stock Market Volatility. International Journal of Forecasting, 36, 334-357.
Baker, M. and Stein, J.C. (2004). Market Liquidity as a Sentiment Indicator. Journal of Financial Markets, 7, 271-299.
Baker, M. and Wurgler, J. (2000). The Equity Share in New Issues and Aggregate Stock Returns. Journal of Finance, 55, 2219-2257.
Baker, M. and Wurgler, J. (2006). Investor Sentiment and the Cross‐section of Stock Returns. Journal of Finance, 61, 1645-1680.
Brown, G.W. and Cliff, M.T. (2004). Investor Sentiment and the Near-term Stock Market. Journal of Empirical Finance, 11, 1-27.
Brown, G.W. and Cliff, M.T. (2005). Investor Sentiment and Asset Valuation. Journal of Business, 78, 405-440.
Chen, K.C., Lin, C.I. and Chen, H.M. (2021). Relationship between News Sentiment Indicator and the Taiwan Weighted Stock Index. Journal of Social Sciences and Philosophy, 33, 383-423. (in Chinese)
Fisher, K.L. and Statman, M. (2000). Investor Sentiment and Stock Returns. Financial Analysts Journal, 56, 16-23.
Garcia, D. (2013). Sentiment during Recessions. Journal of Finance, 68, 1267-1300.
Gillam, L., Ahmad, K., Ahmad, S., Casey, M., Cheng, D., Taskaya, T., de Oliveira, P.C.F. and Manomaisupat, P. (2002). Economic News and Stock Market Correlation: A Study of the UK Market. Workshop at the International Conference on Terminology and Knowledge Engineering.
Kumari, J. and Mahakud, J. (2015). Does Investor Sentiment Predict the Asset Vvolatility? Evidence from Emerging Stock Market India. Journal of Behavioral and Experimental Finance, 8, 25-39.
Li, F. (2010). The Information Content of Forward‐looking Statements in Corporate Filings - A Naïve Bayesian Machine Learning Approach. Journal of Accounting Research, 48, 1049-1102.
Liu, P., Smith, S.D. and Syed, A.A. (1990). Stock Price Reactions to the Wall Street Journal’s Securities Recommendations. Journal of Financial and Quantitative Analysis, 25, 399-410.
Loughran, T. and McDonald, B. (2011). When is a Liability not a Liability? Textual Analysis, Dictionaries, and 10‐Ks. Journal of Finance, 66, 35-65.
Tetlock, P.C. (2007). Giving Content to Investor Sentiment: The Role of Media in the Stock Market. Journal of Finance, 62, 1139-1168.