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Sentiment analysis, or opinion mining, is the field of study that analyses people\u2019s opinions, moods and evaluations using written text on Web platforms. In recent research, a substantial effort has been made to develop sophisticated methods with which to classify sentiments in the financial domain. However, there is a lack of approaches that analyse the positive or negative orientation of each aspect contained in a document. In this respect, we propose a new sentiment analysis method for feature and news polarity classification. The method presented is based on an ontology-driven approach that makes it possible to semantically describe relations between concepts in the financial news domain. The polarity of the features in each document is also calculated by taking into account the words from around the linguistic expression of the feature. These words are obtained by using the \u2018N_GRAM After\u2019, \u2018N_GRAM Before\u2019, \u2018N_GRAM Around\u2019 and \u2018All_Phrase\u2019 methods. The effectiveness of our method has been proved by carrying out a set of experiments on a corpus of 1000 financial news items. Our proposal obtained encouraging results with an accuracy of 66.7% and an F-measure of 64.9% for feature polarity classification and an accuracy of 89.8% and an F-measure of 89.7% for news polarity classification. The experimental results additionally show that the N_GRAM Around method provides the best average results.<\/jats:p>","DOI":"10.1177\/0165551516645528","type":"journal-article","created":{"date-parts":[[2016,5,11]],"date-time":"2016-05-11T21:51:56Z","timestamp":1463003516000},"page":"458-479","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":58,"title":["Feature-based opinion mining in financial news: An ontology-driven approach"],"prefix":"10.1177","volume":"43","author":[{"given":"Mar\u00eda del Pilar","family":"Salas-Z\u00e1rate","sequence":"first","affiliation":[{"name":"Universidad de Murcia, Spain"}]},{"given":"Rafael","family":"Valencia-Garc\u00eda","sequence":"additional","affiliation":[{"name":"Universidad de Murcia, Spain"}]},{"given":"Antonio","family":"Ruiz-Mart\u00ednez","sequence":"additional","affiliation":[{"name":"Universidad de Murcia, Spain"}]},{"given":"Ricardo","family":"Colomo-Palacios","sequence":"additional","affiliation":[{"name":"\u00d8stfold University College, Norway"}]}],"member":"179","published-online":{"date-parts":[[2016,5,1]]},"reference":[{"key":"bibr1-0165551516645528","first-page":"1083","volume-title":"Proceedings of the 4th International Conference on Language Resources and Evaluation","author":"Valitutti R","year":"2004"},{"key":"bibr2-0165551516645528","first-page":"2200","volume-title":"Proceedings of the Seventh International Conference on Language Resources and Evaluation","author":"Baccianella S"},{"key":"bibr3-0165551516645528","doi-asserted-by":"publisher","DOI":"10.1016\/j.eswa.2011.05.070"},{"key":"bibr4-0165551516645528","doi-asserted-by":"publisher","DOI":"10.1016\/j.eswa.2012.07.059"},{"key":"bibr5-0165551516645528","doi-asserted-by":"publisher","DOI":"10.1016\/j.proeng.2013.02.059"},{"key":"bibr6-0165551516645528","doi-asserted-by":"publisher","DOI":"10.1002\/asi.23533."},{"key":"bibr7-0165551516645528","doi-asserted-by":"publisher","DOI":"10.1016\/j.ins.2010.11.023"},{"key":"bibr8-0165551516645528","doi-asserted-by":"publisher","DOI":"10.1016\/j.csl.2013.04.001"},{"key":"bibr9-0165551516645528","doi-asserted-by":"publisher","DOI":"10.1016\/j.ipm.2010.11.003"},{"key":"bibr10-0165551516645528","doi-asserted-by":"publisher","DOI":"10.1016\/S2212-5671(15)00471-2"},{"key":"bibr11-0165551516645528","doi-asserted-by":"publisher","DOI":"10.1016\/j.eswa.2015.07.052"},{"key":"bibr12-0165551516645528","doi-asserted-by":"publisher","DOI":"10.1177\/0165551515585264"},{"key":"bibr13-0165551516645528","unstructured":"Fu G, Wang X. 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