政大機構典藏-National Chengchi University Institutional Repository(NCCUR):Item 140.119/114289

政大機構典藏-National Chengchi University Institutional Repository(NCCUR):Item 140.119/114289

English | 正體中文 | 简体中文 | Post-Print筆數 : 27 | Items with full text/Total items : 113318/144297 (79%)
Visitors : 51068387 Online Users : 910

RC Version 6.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.

Scope

please add "double quotation mark" for query phrases to get precise results

please goto advance search for comprehansive author search

Adv. Search

Home ‧ Login ‧ Upload ‧ Help ‧ About ‧ Administer

Goto mobile version

政大典藏 > College of Informatics > Department of Computer Science > Theses > Item 140.119/114289

Please use this identifier to cite or link to this item: https://nccur.lib.nccu.edu.tw/handle/140.119/114289

Title:	財報文字分析之句子風險程度偵測研究 Risk-related Sentence Detection in Financial Reports
Authors:	柳育彣 Liu, Yu-Wen
Contributors:	蔡銘峰王釧茹 Tsai, Ming-Feng Wang, Chuan-Ju 柳育彣 Liu, Yu-Wen
Keywords:	文字探勘財務風險情緒分析機器學習 Text mining Financial risk Sentiment analysis Machine learning
Date:	2017
Issue Date:	2017-11-01 14:23:00 (UTC+8)
Abstract:	本論文的目標是利用文本情緒分析技巧，針對美國上市公司的財務報表進行以句子為單位的風險評估。過去的財報文本分析研究裡，大多關注於詞彙層面的風險偵測。然而財務文本中大多數的財務詞彙與前後文具有高度的語意相關性，僅靠閱讀單一詞彙可能無法完全理解其隱含的財務訊息。本文將研究層次由詞彙拉升至句子，根據基於嵌入概念的~fastText~與~Siamese CBOW~兩種句子向量表示法學習模型，利用基於嵌入概念模型中，使用目標詞與前後詞彙關聯性表示目標詞語意的特性，萃取出財報句子裡更深層的財務意涵，並學習出更適合用於財務文本分析的句向量表示法。實驗驗證部分，我們利用~10-K~財報資料與本文提出的財務標記資料集進行財務風險分類器學習，並以傳統詞袋模型（Bag-of-Word）作為基準，利用精確度（Accuracy）與準確度（Precision）等評估標準進行比較。結果證實基於嵌入概念模型的表示法在財務風險評估上比傳統詞袋模型有著更準確的預測表現。由於近年大數據時代的來臨，網路中的資訊量大幅成長，依賴少量人力在短期間內分析海量的財務資訊變得更加困難。因此如何協助專業人員進行有效率的財務判斷與決策，已成為一項重要的議題。為此，本文同時提出一個以句子為分析單位的財報風險語句偵測系統~RiskFinder~，依照~fastText~與~Siamese CBOW~兩種模型，經由~10-K~財務報表與人工標記資料集學習出適當的風險語句分類器後，對~1996~至~2013~年的美國上市公司財務報表進行財報句子的自動風險預測，讓財務專業人士能透過系統的協助，有效率地由大量財務文本中獲得有意義的財務資訊。此外，系統會依照公司的財報發布日期動態呈現股票交易資訊與後設資料，以利使用者依股價的時間走勢比較財務文字型與數值型資料的關係。 The main purpose of this paper is to evaluate the risk of financial report of listed companies in sentence-level. Most of past sentiment analysis studies focused on word-level risk detection. However, most financial keywords are highly context-sensitive, which may likely yield biased results. Therefore, to advance the understanding of financial textual information, this thesis broadens the analysis from word-level to sentence level. We use two sentence-level models, fastText and Siamese-CBOW, to learn sentence embedding and attempt to facilitate the financial risk detection. In our experiment, we use the 10-K corpus and a financial sentiment dataset which were labeled by financial professionals to train our financial risk classifier. Moreover, we adopt the Bag-of-Word model as a baseline and use accuracy, precision, recall and F1-score to evaluate the performance of financial risk prediction. The experimental results show that the embedding models could lead better performance than the Bag-of-word model. In addition, this paper proposes a web-based financial risk detection system which is constructed based on fastText and Siamese CBOW model called RiskFinder. There are total 40,708 financial reports inside the system and each risk-related sentence is highlighted based on different sentence embedding models. Besides, our system also provides metadata and a visualization of financial time-series data for the corresponding company according to release day of financial report. This system considerably facilitates case studies in the field of finance and can be of great help in capturing valuable insight within large amounts of textual information.
Reference:	[1] Y. Bengio, R. Ducharme, P. Vincent, and C. Jauvin. A Neural Probabilistic Language Model. Journal of Machine Learning Research, 3(Feb):1137–1155, 2003. [2] P. Bojanowski, E. Grave, A. Joulin, and T. Mikolov. Enriching Word Vectors with Subword Information. arXiv preprint arXiv:1607.04606, 2016. [3] J. L. Campbell, H. Chen, D. S. Dhaliwal, H.-m. Lu, and L. B. Steele. The Information Content of Mandatory Risk Factor Disclosures in Corporate Filings. Review of Accounting Studies, 19(1):396–455, 2014. [4] D. J. Denis and I. Osobov. Why do Firms Pay Dividends? International Evidence on The Determinants of Dividend Policy. Journal of Financial Economics, 89(1):62–82, 2008. [5] E. F. Fama and K. R. French. Industry Costs of Equity. Journal of Financial Economics, 43(2):153–193, 1997. [6] M. Faruqui, J. Dodge, S. K. Jauhar, C. Dyer, E. Hovy, and N. A. Smith. Retrofitting Word Vectors to Semantic Lexicons. arXiv preprint arXiv:1411.4166, 2014. [7] N. Jegadeesh and D. Wu. Word Power: A New Approach for Content Analysis. Journal of Financial Economics, 110(3):712–729, 2013. [8] A. Joulin, E. Grave, P. Bojanowski, and T. Mikolov. Bag of Tricks for Efficient Text Classification. arXiv preprint arXiv:1607.01759, 2016. [9] T. Kenter, A. Borisov, and M. de Rijke. Siamese Cbow: Optimizing Word Embeddings for Sentence Representations. arXiv preprint arXiv:1606.04640, 2016. [10] S. Kogan, D. Levin, B. R. Routledge, J. S. Sagi, and N. A. Smith. Predicting risk from Financial Reports with Regression. In Proceedings of Human Language Technologies: The 2009 Annual Conference of the North American Chapter of the Association for Computational Linguistics, pages 272–280. Association for Computational Linguistics, 2009. [11] T. Loughran and B. McDonald. When is a Liability not a Liability? Textual Analysis, Dictionaries, and 10-ks. The Journal of Finance, 66(1):35–65, 2011. [12] T. Mikolov, K. Chen, G. Corrado, and J. Dean. Efficient Estimation of Word Representations in Vector Space. arXiv preprint arXiv:1301.3781, 2013. [13] T. Mikolov, I. Sutskever, K. Chen, G. S. Corrado, and J. Dean. Distributed Representations of Words and Phrases and Their Compositionality. In Advances in Neural Information Processing Systems, pages 3111–3119, 2013. [14] N. Rekabsaz, M. Lupu, A. Baklanov, A. Hanbury, A. D¨ur, and L. Anderson. Volatility Prediction Using Financial Disclosures Sentiments with Word Embedding-Based IR Models. arXiv preprint arXiv:1702.01978, 2017. [15] W. F. Sharpe. Capital Asset Prices: A Theory of Market Equilibrium Under Conditions of Risk. The Journal of Finance, 19(3):425–442, 1964. [16] M.-F. Tsai, C.-J. Wang, and P.-C. Chien. Discovering Finance Keywords via Continuous-space Language Models. ACM Transactions on Management Information Systems (TMIS), 7(3):7, 2016. [17] C.-J. Wang, M.-F. Tsai, T. Liu, and C.-T. Chang. Financial Sentiment Analysis for Risk Prediction. In Proceedings of the 6th International Joint Conference on Natural Language Processing., pages 802–808, 2013. [18] S. Wang and C. D. Manning. Baselines and Bigrams: Simple, Good Sentiment and Topic Classification. In Proceedings of the 50th Annual Meeting of the Association for Computational Linguistics: Short Papers-Volume 2, pages 90–94. Association for Computational Linguistics, 2012.
Description:	碩士國立政治大學資訊科學學系 104753035
Source URI:	http://thesis.lib.nccu.edu.tw/record/#G1047530352
Data Type:	thesis
Appears in Collections:	[Department of Computer Science ] Theses

Files in This Item:

File	Size	Format
035201.pdf	2705Kb	Adobe PDF2	33	View/Open

All items in 政大典藏 are protected by copyright, with all rights reserved.

社群 sharing

著作權政策宣告 Copyright Announcement

1.本網站之數位內容為國立政治大學所收錄之機構典藏，無償提供學術研究與公眾教育等公益性使用，惟仍請適度，合理使用本網站之內容，以尊重著作權人之權益。商業上之利用，則請先取得著作權人之授權。
The digital content of this website is part of National Chengchi University Institutional Repository. It provides free access to academic research and public education for non-commercial use. Please utilize it in a proper and reasonable manner and respect the rights of copyright owners. For commercial use, please obtain authorization from the copyright owner in advance.

2.本網站之製作，已盡力防止侵害著作權人之權益，如仍發現本網站之數位內容有侵害著作權人權益情事者，請權利人通知本網站維護人員(nccur@nccu.edu.tw)，維護人員將立即採取移除該數位著作等補救措施。
NCCU Institutional Repository is made to protect the interests of copyright owners. If you believe that any material on the website infringes copyright, please contact our staff(nccur@nccu.edu.tw). We will remove the work from the repository and investigate your claim.

DSpace Software Copyright © 2002-2004 MIT & Hewlett-Packard / Enhanced by NTU Library IR team Copyright © - Feedback