MFMDQwen: Multilingual Financial Misinformation Detection Based on Large Language Model

Zhiwei Liu, Yuyan Wang, Yuechen Jiang, Yupeng Cao, Tianlei Zhu, Xiaorui Guo, Zhiyang Deng, Zhiyuan Yao, Xiao-Yang Liu, Jimin Huang, Sophia Ananiadou


Abstract
Financial misinformation poses significant threats to financial market stability and individuals’ investment decisions. The multilingual environment and the inherent complexity of financial information present substantial challenges for Multilingual Financial Misinformation Detection (MFMD). Existing LLM-based approaches for financial misinformation detection primarily focus on English and a single financial misinformation detection task, which limits their ability to capture multilingual contexts and complex features. In this paper, we propose MFMDQwen, the first open-source LLM designed for MFMD tasks. Furthermore, we introduce MFMD4Instruction, the first instruction dataset supporting MFMD with LLMs, covering English, Chinese, Greek, and Bengali. We also construct MFMDBench, a benchmark dataset for evaluating the MFMD capabilities of LLMs. Experimental results on MFMDBench demonstrate that our model outperforms existing open-source LLMs.
Anthology ID:
2026.mellm-1.7
Volume:
Proceedings of the 1st Workshop on Multilinguality in the Era of Large Language Models (MeLLM 2026)
Month:
July
Year:
2026
Address:
San Diego, United States
Editors:
Kaiyu Huang, Fengran Mo, Pinzhen Chen, Meng Jiang
Venues:
MeLLM | WS
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
75–82
Language:
URL:
https://preview.aclanthology.org/ingest-acl-workshops/2026.mellm-1.7/
DOI:
Bibkey:
Cite (ACL):
Zhiwei Liu, Yuyan Wang, Yuechen Jiang, Yupeng Cao, Tianlei Zhu, Xiaorui Guo, Zhiyang Deng, Zhiyuan Yao, Xiao-Yang Liu, Jimin Huang, and Sophia Ananiadou. 2026. MFMDQwen: Multilingual Financial Misinformation Detection Based on Large Language Model. In Proceedings of the 1st Workshop on Multilinguality in the Era of Large Language Models (MeLLM 2026), pages 75–82, San Diego, United States. Association for Computational Linguistics.
Cite (Informal):
MFMDQwen: Multilingual Financial Misinformation Detection Based on Large Language Model (Liu et al., MeLLM 2026)
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PDF:
https://preview.aclanthology.org/ingest-acl-workshops/2026.mellm-1.7.pdf