@article{kralj2015analysis,
abstract = {Unstructured data, such as news and blogs, can provide valuable insights into the financial world. We present the NewsStream portal, an intuitive and easy-to-use tool for news analytics, which supports interactive querying and visualizations of the documents at different levels of detail. It relies on a scalable architecture for real-time processing of a continuous stream of textual data, which incorporates data acquisition, cleaning, natural-language preprocessing and semantic annotation components. It has been running for over two years and collected over 18 million news articles and blog posts. The NewsStream portal can be used to answer the questions when, how often, in what context, and with what sentiment was a financial entity or term mentioned in a continuous stream of news and blogs, and therefore providing a complement to news aggregators. We illustrate some features of our system in three use cases: relations between the rating agencies and the PIIGS countries, reflection of financial news on credit default swap (CDS) prices, and the emergence of the Bitcoin digital currency.},
archivePrefix = {arXiv},
arxivId = {1508.00027},
author = {Novak, Petra Kralj and Gr{\v{c}}ar, Miha and Mozeti{\v{c}}, Igor},
eprint = {1508.00027},
institution = {Jo{\v{z}}ef Stefan Institute, Ljubljana},
journal = {Working Paper arxiv 1508.00027},
keywords = {DOLFINS{\_}T3.1,DOLFINS{\_}WP3},
mendeley-tags = {DOLFINS{\_}T3.1,DOLFINS{\_}WP3},
number = {IJS-DP-11965},
title = {{Analysis of Financial News with NewsStream}},
url = {http://arxiv.org/abs/1508.00027},
year = {2015}
}

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