재무분야 감성사전 구축을 위한 자동화된 감성학습 알고리즘 개발

• 영문명: Developing the Automated Sentiment Learning Algorithm to Build the Korean Sentiment Lexicon for Finance
• 발행기관: 한국산업경영시스템학회
• 저자명: 조수지 이기광 양철원
• 간행물 정보: 『산업경영시스템학회지』제46권 제1호, 32~null쪽, 전체 1쪽
• 주제분류: 공학 > 산업공학
• 파일형태: PDF
• 발행일자: 2023.03.31

영문 초록

Recently, many studies are being conducted to extract emotion from text and verify its information power in the field of finance, along with the recent development of big data analysis technology. A number of prior studies use pre-defined sentiment dictionaries or machine learning methods to extract sentiment from the financial documents. However, both methods have the disadvantage of being labor-intensive and subjective because it requires a manual sentiment learning process. In this study, we developed a financial sentiment dictionary that automatically extracts sentiment from the body text of analyst reports by using modified Bayes rule and verified the performance of the model through a binary classification model which predicts actual stock price movements. As a result of the prediction, it was found that the proposed financial dictionary from this research has about 4% better predictive power for actual stock price movements than the representative Loughran and McDonald’s (2011) financial dictionary. The sentiment extraction method proposed in this study enables efficient and objective judgment because it automatically learns the sentiment of words using both the change in target price and the cumulative abnormal returns. In addition, the dictionary can be easily updated by re-calculating conditional probabilities. The results of this study are expected to be readily expandable and applicable not only to analyst reports, but also to financial field texts such as performance reports, IR reports, press articles, and social media.

목차

1. 서론

2. 재무 분야 감성 분석 연구

3. 자료 및 방법론

4. 결과 및 해석

5. 결론

키워드

Text Mining Analyst Report Classification Modified Bayes Rule Sentiment Extraction