Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Investor Reaction to Financial Disclosures Across Topics: An Application
  of Latent Dirichlet Allocation   This paper provides a holistic study of how stock prices vary in their
response to financial disclosures across different topics. Thereby, we
specifically shed light into the extensive amount of filings for which no a
priori categorization of their content exists. For this purpose, we utilize an
approach from data mining - namely, latent Dirichlet allocation - as a means of
topic modeling. This technique facilitates our task of automatically
categorizing, ex ante, the content of more than 70,000 regulatory 8-K filings
from U.S. companies. We then evaluate the subsequent stock market reaction. Our
empirical evidence suggests a considerable discrepancy among various types of
news stories in terms of their relevance and impact on financial markets. For
instance, we find a statistically significant abnormal return in response to
earnings results and credit rating, but also for disclosures regarding business
strategy, the health sector, as well as mergers and acquisitions. Our results
yield findings that benefit managers, investors and policy-makers by indicating
how regulatory filings should be structured and the topics most likely to
precede changes in stock valuations.

5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
13
The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys