JURNAL TEKNOLOGI DAN OPEN SOURCE
Vol. 9 No. 1 (2026): Jurnal Teknologi dan Open Source, June 2026

Benchmarking IndoBERT and Multilingual BERT for Indonesian Financial News Sentiment Classification

Matius Ivan Bimasena (Institut Teknologi dan Bisnis STIKOM Bali)
I Kadek Yogi Prayoga (Department of Information Technology, Institut Teknologi dan Bisnis STIKOM Bali, Indonesia)
I Gusti Agung Putu Mahendra (Department of Informatic Engineering, Politeknik Negeri Bengkalis, Indonesia)
Purnama Sidik (Department of Information Technology, Institut Teknologi dan Bisnis STIKOM Bali, Indonesia)



Article Info

Publish Date
11 Jun 2026

Abstract

Financial news sentiment classification was important for understanding market narratives and investor perception, but Indonesian financial news remained challenging because it contained domain-specific terminology, numerical expressions, and imbalanced sentiment categories. This study benchmarked two transformer-based models, IndoBERT and Multilingual BERT, for classifying Indonesian financial news sentiment into negative, neutral, and positive classes. The dataset consisted of economic and financial news articles from Kontan, CNBC, and Bisnis.com during the first quarter of 2026. After preprocessing, 3,366 articles were used, consisting of 3,070 neutral, 184 negative, and 112 positive articles. The dataset was divided into training, validation, and testing sets using stratified splitting. Class weighting was applied to reduce the effect of class imbalance. The results showed that IndoBERT achieved the best overall performance, with 0.94 accuracy and 0.71 macro F1-score, while Multilingual BERT achieved 0.93 accuracy and 0.70 macro F1-score. These findings indicated that IndoBERT was more suitable for Indonesian financial news sentiment classification, although Multilingual BERT remained competitive, especially in detecting positive sentiment.

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Journal Info

Abbrev

JTOS

Publisher

Subject

Computer Science & IT

Description

Jurnal Teknologi dan Open Source menerbitkan naskah ilmiah. yang berkaitan dengan sistem informasi, teknologi informasi dan aplikasi open source secara berkala (2 kali setahun). Jurnal ini dikelola dan diterbitkan oleh Program Studi Teknik Informatika Fakultas Teknik, Universitas Islam Kuantan ...