| Title | On the Importance of Text Analysis for Stock Price Prediction | 
  
  | Authors | Heeyoung Lee, Mihai Surdeanu, Bill Maccartney and Dan Jurafsky | 
  
  | Abstract | We investigate the importance of text analysis for stock price prediction. In particular, we introduce a system that forecasts companies stock price changes (UP, DOWN, STAY) in response to financial events reported in 8-K documents. Our results indicate that using text boosts prediction accuracy over 10% (relative) over a strong baseline that incorporates many financially-rooted features. This impact is most important in the short term (i.e., the next day after the financial event) but persists for up to five days. | 
  
  | Topics | Opinion Mining / Sentiment Analysis | 
  
  | Full paper  | On the Importance of Text Analysis for Stock Price Prediction | 
  
  | Bibtex | @InProceedings{LEE14.1065, author =  {Heeyoung Lee and Mihai Surdeanu and Bill Maccartney and Dan Jurafsky},
 title =  {On the Importance of Text Analysis for Stock Price Prediction},
 booktitle =  {Proceedings of the Ninth International Conference on Language Resources and Evaluation (LREC'14)},
 year =  {2014},
 month =  {may},
 date =  {26-31},
 address =  {Reykjavik, Iceland},
 editor =  {Nicoletta Calzolari (Conference Chair) and Khalid Choukri and Thierry Declerck and Hrafn Loftsson and Bente Maegaard and Joseph Mariani and Asuncion Moreno and Jan Odijk and Stelios Piperidis},
 publisher =  {European Language Resources Association (ELRA)},
 isbn =  {978-2-9517408-8-4},
 language =  {english}
 }
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