Exploring the Impact of Corpus Diversity on Financial Pretrained Language Models

• URL: http://arxiv.org/abs/2310.13312v1
• Date: Fri, 20 Oct 2023 07:04:08 GMT
• Title: Exploring the Impact of Corpus Diversity on Financial Pretrained Language Models
• Authors: Jaeyoung Choe, Keonwoong Noh, Nayeon Kim, Seyun Ahn, Woohwan Jung
• Abstract summary: We show that financial language models (PLMs) are not pretrained on sufficiently diverse financial data. To address this issue, we trained the Financial Language Model (FiLM) on these diverse datasets. Our experimental results confirm that FiLM outperforms not only existing financial PLMs but also general domain PLMs.
• Score: 2.5749046466046903
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Over the past few years, various domain-specific pretrained language models (PLMs) have been proposed and have outperformed general-domain PLMs in specialized areas such as biomedical, scientific, and clinical domains. In addition, financial PLMs have been studied because of the high economic impact of financial data analysis. However, we found that financial PLMs were not pretrained on sufficiently diverse financial data. This lack of diverse training data leads to a subpar generalization performance, resulting in general-purpose PLMs, including BERT, often outperforming financial PLMs on many downstream tasks. To address this issue, we collected a broad range of financial corpus and trained the Financial Language Model (FiLM) on these diverse datasets. Our experimental results confirm that FiLM outperforms not only existing financial PLMs but also general domain PLMs. Furthermore, we provide empirical evidence that this improvement can be achieved even for unseen corpus groups.

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