A Comparative Study of Evaluation Metrics for Long-Document Financial Narrative Summarization with Transformers
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Computer Science > Computation and Language
arXiv:2610.09529 (cs)
[Submitted on 7 Oct 2026]
Title:A Comparative Study of Evaluation Metrics for Long-Document Financial Narrative Summarization with Transformers
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Abstract:There are more than 2,000 listed companies on the UK's London Stock Exchange, divided into 11 sectors who are required to communicate their financial results at least twice in a single financial year. UK annual reports are very lengthy documents with around 80 pages on average. In this study, we aim to benchmark a variety of summarisation methods on a set of different pre-trained transformers with different extraction techniques. In addition, we considered multiple evaluation metrics in order to investigate their differing behaviour and applicability on a dataset from the Financial Narrative Summarisation (FNS 2020) shared task, which is composed of annual reports published by firms listed on the London Stock Exchange and their corresponding summaries. We hypothesise that some evaluation metrics do not reflect true summarisation ability and propose a novel BRUGEscore metric, as the harmonic mean of ROUGE-2 and BERTscore. Finally, we perform a statistical significance test on our results to verify whether they are statistically robust, alongside an adversarial analysis task with three different corruption methods.
| Comments: | 12 pages |
| Subjects: | Computation and Language (cs.CL) |
| Cite as: | arXiv:2610.09529 [cs.CL] |
| (or arXiv:2610.09529v1 [cs.CL] for this version) | |
| https://doi.org/10.48550/arXiv.2610.09529
arXiv-issued DOI via DataCite (pending registration)
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| Journal reference: | Natural Language Processing and Information Systems. NLDB 2023 |
| Related DOI: | https://doi.org/10.1007/978-3-031-35320-8_28
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View a PDF of the paper titled A Comparative Study of Evaluation Metrics for Long-Document Financial Narrative Summarization with Transformers, by Nadhem Zmandar and 2 other authors
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