金融时间序列建模新范式,高效处理长周期、多通道、缺失数据。
EXAONE Forecast for Finance
- 用线性时间操作替代自注意力,提升计算效率
- 在多资产金融基准上三项指标均达顶尖水平
- 专为金融数据设计,支持缺失值训练,适合量化研究
本技术报告介绍EXAONE Finance,一种针对金融预测的金融时间序列基础模型(TSFM)。现有时间序列基础模型虽在零样本场景表现优异,但主要面向通用领域,依赖自注意力结构,计算成本随序列长度和变量数呈二次增长。同时,它们假设输入完全可观测,且预训练语料无法捕捉金融市场的独特动态。这些限制使其难以应用于金融领域,该领域普遍存在长序列、多通道、间歇性缺失的数据。为此,EXAONE Finance采用无注意力架构,以两个高效线性运算取代自注意力:1)因果一维卷积用于时序混合;2)分组感知的MLP池化用于变量混合。此外,通过掩码上下文增强,使模型在训练中暴露于连续缺失片段,提升对金融数据中普遍存在的缺失问题的鲁棒性。模型在覆盖股票、外汇、大宗商品、加密资产、固定收益及宏观经济指标的大规模金融语料上进行预训练。在涵盖多种资产类别的金融预测基准FinVerse上,EXAONE Finance在点预测准确率、跨资产排序、组合盈利三个评估层级均排名第一,达到当前最优性能。
原文摘要 · Abstract (English)
This technical report presents EXAONE Forecast for Finance (EXAONE Finance), a financial time series (TS) foundation model (TSFM) tailored to financial forecasting. Recent TSFMs achieve strong zero-shot performance through large-scale pretraining. However, they are primarily developed for general-domain TS and largely rely on self-attention backbones whose computational cost grows quadratically with sequence length and variate count. Moreover, they assume fully observed inputs and are pretrained on corpora that fail to capture the unique dynamics of financial markets. These limitations hinder their applicability to finance, where long, many-channel, intermittently observed panels are common. To address these challenges, EXAONE Finance adopts an attention-free architecture, replacing self-attention with two simple yet effective linear-time operators: 1) a causal 1D convolution for temporal mixing and 2) a group-aware pooling multi-layer perceptron (MLP) for variate mixing. Furthermore, a masked context augmentation exposes the model to contiguous missing spans during training, improving robustness to the missingness pervasive in financial markets. EXAONE Finance is pretrained on a large-scale financial corpus covering not only equities but also foreign exchange, commodities, crypto-assets, fixed income, and macroeconomic indicators. On FinVerse, a financial forecasting benchmark covering diverse asset classes, EXAONE Finance attains state-of-the-art performance, ranking first across all three evaluation tiers---point-forecast accuracy, cross-sectional asset ranking, and portfolio profitability.
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