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Cited by 1,396

The DOI matches its Crossref record; 3 of the 3 references it cites were found in a registry or an index.

Yahoo! for Amazon: Sentiment Extraction from Small Talk on the Web

Das, Sanjiv R., Chen, Mike Y.·2007·Management Science

Abstract

Extracting sentiment from text is a hard semantic problem. We develop a methodology for extracting small investor sentiment from stock message boards. The algorithm comprises different classifier algorithms coupled together by a voting scheme. Accuracy levels are similar to widely used Bayes classifiers, but false positives are lower and sentiment accuracy higher. Time series and cross-sectional aggregation of message information improves the quality of the resultant sentiment index, particularly in the presence of slang and ambiguity. Empirical applications evidence a relationship with stock values—tech-sector postings are related to stock index levels, and to volumes and volatility. The algorithms may be used to assess the impact on investor opinion of management announcements, press releases, third-party news, and regulatory changes.

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Crossref · 10.1287/mnsc.1070.0704

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Metadata

Authors
Das, S. R., & Chen, M. Y.
Venue
Management Science
Published
2007-09
Volume
53
Issue
9
Pages
1375-1388
ISSN
  • 0025-1909 (ISSN-L)
  • 1526-5501
OpenAlex
W2048658075
Cited by
1,396
References
3
FWCI
35.07
Type
journal article
Language
en
Open access
closed

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