Field	Value
Base Model	`ihsan31415/indo-roBERTa-financial-sentiment`
Architecture	RoBERTa (~125M params)
Language	Indonesian (Bahasa Indonesia)
Task	3-class Financial Sentiment Classification
License	MIT
Fine-tuned on	Google Colab T4 GPU

Label Mapping

⚠️ Non-standard label order — inherited from the base model.

Label ID	Sentiment
`0`	Positive
`1`	Neutral
`2`	Negative

Training Data

This model was fine-tuned on a combination of three datasets, augmented with synthetic data:

Source	Type	Samples
`intanm/indonesian-financial-sentiment-analysis`	HuggingFace Dataset	Primary source
CNBC Indonesia Stock News Sentiment	Kaggle (2024-2025)	9,819 headlines
IndoNLU SmSA	HuggingFace (IndoNLU)	~12,000 reviews

Data Augmentation

Three augmentation methods were used to balance class distribution:

Gemini Synthetic Generation (gemini-2.5-flash) — Generated structured financial news sentences targeting underrepresented classes
GPT-2 Prompt Completion (indonesian-nlp/gpt2-medium-indonesian) — Diverse paraphrasing from financial prompt templates
RoBERTa Masked Augmentation — Strategic token masking with protected financial keywords (tickers, directional terms)

Final Dataset Distribution

Split	Samples
Train	20,616
Test	5,155

Training Configuration

python

TrainingArguments(
    per_device_train_batch_size=64,
    gradient_accumulation_steps=4,       # Effective batch size: 256
    num_train_epochs=15,                 # With early stopping (patience=3)
    learning_rate=1e-5,                  # Lower LR for continued fine-tuning
    weight_decay=0.01,
    warmup_ratio=0.1,
    lr_scheduler_type="cosine",
    metric_for_best_model="f1",
    fp16=True,
)

Training Progress

Epoch	Train Loss	Val Loss	Accuracy	F1	Precision	Recall
1.0	0.8945	0.4876	0.7996	0.7998	0.8001	0.7996
2.0	0.4094	0.3435	0.8640	0.8634	0.8658	0.8640
3.0	0.2982	0.2725	0.8980	0.8979	0.8981	0.8980
4.0	0.2253	0.2469	0.9115	0.9113	0.9117	0.9115
5.0	0.1785	0.2418	0.9187	0.9186	0.9188	0.9187
6.0	0.1475	0.2384	0.9232	0.9231	0.9233	0.9232
7.0	0.1275	0.2450	0.9214	0.9213	0.9215	0.9214
8.0	0.1069	0.2452	0.9251	0.9251	0.9251	0.9251
9.0	0.0904	0.2465	0.9259	0.9258	0.9258	0.9259
10.0	0.0807	0.2460	0.9284	0.9284	0.9284	0.9284
11.0	0.0720	0.2548	0.9274	0.9273	0.9274	0.9274
12.0	0.0692	0.2570	0.9276	0.9275	0.9276	0.9276
13.0	0.0608	0.2612	0.9274	0.9273	0.9274	0.9274
13.0	0.0608	0.2460	0.9284	0.9284	0.9284	0.9284

Evaluation Results

Metric	Score
Accuracy	0.9284
F1 (weighted)	0.9284
Precision (weighted)	0.9284
Recall (weighted)	0.9284

Per-Class Performance

Class	Precision	Recall	F1-Score	Support
Positive	0.9405	0.9458	0.9432	2105
Neutral	0.9110	0.9090	0.9100	1407
Negative	0.9278	0.9227	0.9252	1643

Confusion Matrix

Usage

Pipeline API

python

from transformers import pipeline

classifier = pipeline(
    "sentiment-analysis",
    model="will702/indo-roBERTa-financial-sentiment-v2"
)

result = classifier("IHSG ditutup menguat 1.5% didorong aksi beli investor asing")
# {'label': 'LABEL_0', 'score': 0.98}  → Positive

Manual Inference

python

from transformers import AutoTokenizer, AutoModelForSequenceClassification
import torch

model = AutoModelForSequenceClassification.from_pretrained(
    "will702/indo-roBERTa-financial-sentiment-v2"
)
tokenizer = AutoTokenizer.from_pretrained(
    "will702/indo-roBERTa-financial-sentiment-v2"
)

text = "Rupiah melemah tajam terhadap dolar AS akibat sentimen global"
inputs = tokenizer(text, return_tensors="pt", truncation=True, padding=True)
outputs = model(**inputs)

label_map = {0: "Positive", 1: "Neutral", 2: "Negative"}
predicted = torch.argmax(outputs.logits, dim=1).item()
print(f"Sentiment: {label_map[predicted]}")

Improvements Over Base Model

Aspect	Base (v1)	This Model (v2)
Datasets	1 (intanm only)	3 (intanm + CNBC + SmSA)
Learning Rate	2e-5	1e-5 (preserves prior knowledge)
Scheduler	Linear	Cosine with warmup
Primary Metric	Accuracy	F1 (weighted)
Early Stopping	patience=2	patience=3

Limitations

Primarily trained on formal financial news — may underperform on very informal social media text or slang
Label mapping is non-standard (0=Positive) — ensure downstream systems account for this
Augmented data includes synthetic samples which may not perfectly reflect real-world distribution

Citation

bibtex

@misc{indo_roberta_fin_v2_2026,
  title        = {IndoRoBERTa Financial Sentiment v2},
  author       = {Gregorius Willson},
  howpublished = {\url{https://huggingface.co/will702/indo-roBERTa-financial-sentiment-v2}},
  year         = {2026},
  note         = {Fine-tuned from ihsan31415/indo-roBERTa-financial-sentiment with multi-source data and augmentation},
}

Acknowledgments

Original model by Khoirul Ihsan
Base architecture: w11wo/indonesian-roberta-base-sentiment-classifier
CNBC Indonesia dataset by triagungj
IndoNLU benchmark by indonlp