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Financial ratios and stock returns reappraised through a topological data analysis lens

Pawel Dlotko Orcid Logo, W. Qiu, Simon Rudkin Orcid Logo

The European Journal of Finance, Volume: 30, Issue: 1, Pages: 53 - 77

Swansea University Authors: Pawel Dlotko Orcid Logo, Simon Rudkin Orcid Logo

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Abstract

Firm financials are well-established predictors of stock returns, being the basis for both the traditional econometric, and growing Machine Learning, asset pricing literature. Employing topological data analysis ball mapper (TDABM), we revisit the association between seven of the most commonly studi...

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Published in: The European Journal of Finance
ISSN: 1351-847X 1466-4364
Published: Informa UK Limited 2024
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa59134
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Abstract: Firm financials are well-established predictors of stock returns, being the basis for both the traditional econometric, and growing Machine Learning, asset pricing literature. Employing topological data analysis ball mapper (TDABM), we revisit the association between seven of the most commonly studied financial ratios and stock returns. Upon outlining the methodology to the finance literature, this paper offers three key contributions to the study of asset pricing. Firstly, the characteristic space is visualised to showcase non-monotonic relationships in multiple dimensions that were as yet unseen. Secondly, the means through which neural networks and random forest regressions fit stock returns is also visualised, showing where Machine Learning is contributing to understanding. Finally, an initial application of TDABM for the segmentation of the cross-section is posited, with significant abnormal returns identified. Collectively these three expositions signpost the value of TDABM for financial researchers and practitioners alike. The scope for benefit is limited only by the availability of information to the analyst.
Keywords: Stock returns, anomalies, topological data analysis, data science, mispricing
College: Faculty of Humanities and Social Sciences
Funders: This work was supported by Max-Planck-Gesellschaft [Dioscuri Program], jointly managed with the National Science Centre (Poland), and mutually funded by the Polish Ministry of Science and Higher Education and the German Federal Ministry of Education and Research.
Issue: 1
Start Page: 53
End Page: 77