Romeo777777/Llama_Sentiment_Classifier

Llama Sentiment Classifier (QLoRA Fine-Tuned)

This repository provides a LLaMA-based financial sentiment classifier fine-tuned using QLoRA for 3-class sentiment classification on finance-domain text. The model is designed for downstream applications including sentiment-driven alpha signal generation and market-neutral trading strategies.

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Model Summary

• Backbone: Meta-LLaMA3-8B
• Task: Financial sentiment classification (3 classes)
• Fine-tuning method: QLoRA (4-bit quantization + LoRA adapters)
• Training framework: SWIFT (Scalable lightWeight Infrastructure for Fine-Tuning)
• Architecture: LlamaForSequenceClassification

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Labels

This model performs single-label classification into 3 discrete classes.

In the paper, the unified sentiment label space is:

• -1 = Negative
• 0 = Neutral
• 1 = Positive

Note: your Hugging Face config may show LABEL_0, LABEL_1, LABEL_2.

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Datasets

Part 1 — Fine-tuning datasets (4 sources), can be accessed through Romeo777777/FinLlaMa_Training_Dataset

Training uses 4 finance-domain sentiment datasets:

1. Financial PhraseBank v1.0

   • 4,840 manually annotated sentences
   • 3-class sentiment (positive/neutral/negative)

2. NASDAQ News Sentiment

   • synthetic sentiment dataset generated using GPT-4o
   • labeled into positive/neutral/negative

3. Twitter Financial News Sentiment

   • 11,932 finance-related tweets
   • original label encoding: 0 bearish, 1 bullish, 2 neutral

4. FIQA2018 (FiQA)

   • financial opinion mining dataset
   • sentiment score in [-1, 1] (continuous), then discretized

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Part 2 — Real-world news evaluation dataset

For downstream evaluation and trading strategy experiments, the paper uses a news + price dataset covering:

• 502 S&P 500 companies
• ~77,000 news headlines
• time range: 2024-01-01 to 2025-05-30

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Preprocessing

Label normalization (unified mapping)

All datasets are standardized into the unified label space: {-1, 0, 1}.

Mapping rules:

• Financial PhraseBank:
  "negative" → -1, "neutral" → 0, "positive" → 1

• FIQA2018 (score in [-1, 1]):
  < -0.2 → -1, > 0.2 → 1, otherwise 0

• Twitter Financial Sentiment:
  0 → -1, 2 → 0, 1 → 1

• NASDAQ News (0~5 score):
  <= 1 → -1, >= 4 → 1, otherwise 0

Tokenization

Uses the official LLaMA 3 tokenizer.

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Training Method

QLoRA fine-tuning

The model is fine-tuned with QLoRA, which keeps the backbone weights in 4-bit quantized form and trains LoRA adapters in higher precision.

The paper’s QLoRA setup includes NF4 quantization + double quantization for memory efficiency.

SWIFT training framework

Fine-tuning is orchestrated using SWIFT, a modular training framework that simplifies adapter integration and efficient training for quantized models.

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Hyperparameters (paper)

• LoRA rank r = 16
• LoRA alpha = 32
• LoRA dropout = 0.1
• learning rate 1e-4, optimizer AdamW
• batch size 8, epochs 1
• gradient accumulation 4
• gradient checkpointing enabled
• cosine learning rate schedule

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Evaluation Results (paper)

On a test set of 9,064 finance news samples, the fine-tuned model reports:

• Accuracy: 92.18%
• Micro-F1: 0.9218
• Macro-F1: 0.5787

Class-wise performance highlights strong Positive and Neutral performance, but weaker Negative performance due to class imbalance.

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Usage

from transformers import pipeline

clf = pipeline(
    "text-classification",
    model="Romeo777777/Llama_Sentiment_Classifier",
    tokenizer="Romeo777777/Llama_Sentiment_Classifier",
    return_all_scores=True,
)

print(clf("Bitcoin is pumping hard today!"))