Gemma 4 E4B — Quantitative Finance (LoRA)

Fine-tuné sur 24 exemples Q&A de finance quantitative via QLoRA (rank=32).

Erreurs du modèle de base corrigées

Erreur Correction
SABR attribué à HJM Hagan, Kumar, Lesniewski & Woodward (2002)
SABR vol avec mean-reversion GBM log-normal sans drift
Bergomi = CIR/Heston Forward variance curve ξᵗᵤ
Formule SABR inventée Formule exacte avec z, χ(z)

Entraînement

Paramètre Valeur
GPU RTX PRO 4500 (31.9 GB VRAM)
Méthode QLoRA 4-bit
LoRA rank 32
LoRA alpha 64
Dataset mo35/quant-finance-dataset
Epochs 10
Loss finale 2.5583

Utilisation rapide

from unsloth import FastModel

model, tokenizer = FastModel.from_pretrained(
    "mo35/gemma4-quantfin-lora", max_seq_length=4096, load_in_4bit=True
)
FastModel.for_inference(model)

inputs = tokenizer.apply_chat_template(
    [{"role": "user", "content": "Derive the SABR implied volatility formula."}],
    return_tensors="pt", add_generation_prompt=True
).to("cuda")
print(tokenizer.decode(model.generate(inputs, max_new_tokens=1024)[0][inputs.shape[-1]:],
                       skip_special_tokens=True))
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