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  4. Evaluating the rationales of amateur investors
 
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Evaluating the rationales of amateur investors

Journal
The Web Conference 2021 - Proceedings of the World Wide Web Conference, WWW 2021
Pages
3987-3998
Date Issued
2021
Author(s)
Chen C.-C
Huang H.-H
HSIN-HSI CHEN  
DOI
10.1145/3442381.3449964
URI
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85106428185&doi=10.1145%2f3442381.3449964&partnerID=40&md5=71ee5c115519d959d158fe4aecd97fd7
https://scholars.lib.ntu.edu.tw/handle/123456789/581357
Abstract
Social media's rise in popularity has demonstrated the usefulness of the wisdom of the crowd. Most previous works take into account the law of large numbers and simply average the results extracted from tasks such as opinion mining and sentiment analysis. Few attempt to identify high-quality opinions from the mined results. In this paper, we propose an approach for capturing expert-like rationales from social media platforms without the requirement of the annotated data. By leveraging stylistic and semantic features, our approach achieves an F1-score of 90.81%. The comparison between the rationales of experts and those of the crowd is done from stylistic and semantic perspectives, revealing that stylistic and semantic information provides complementary cues for professional rationales. We further show the advantage of using these superlative analysis results in the financial market, and find that top-ranked opinions identified by our approach increase potential returns by up to 90.31% and reduce downside risk by up to 71.69%, compared with opinions ranked by feedback from social media users. Moreover, the performance of our method on downside risk control is comparable with that of professional analysts. ?? 2021 ACM.
Subjects
Semantics; Sentiment analysis; Social networking (online); World Wide Web; Downside risks; Law of large numbers; Opinion mining; Semantic features; Semantic information; Social media; Social media platforms; Wisdom of the crowds; Risk assessment
Type
conference paper

臺大位居世界頂尖大學之列,為永久珍藏及向國際展現本校豐碩的研究成果及學術能量,圖書館整合機構典藏(NTUR)與學術庫(AH)不同功能平台,成為臺大學術典藏NTU scholars。期能整合研究能量、促進交流合作、保存學術產出、推廣研究成果。

To permanently archive and promote researcher profiles and scholarly works, Library integrates the services of “NTU Repository” with “Academic Hub” to form NTU Scholars.

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開放取用是從使用者角度提升資訊取用性的社會運動,應用在學術研究上是透過將研究著作公開供使用者自由取閱,以促進學術傳播及因應期刊訂購費用逐年攀升。同時可加速研究發展、提升研究影響力,NTU Scholars即為本校的開放取用典藏(OA Archive)平台。(點選深入了解OA)

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