arXiv Machine Learning

Beyond Co-Movement: Locality by Exposures Enables a Joint Factor-Graph Framework for Portfolio Diversification

arXiv:2608. 06618v1 Announce Type: cross Abstract: Current portfolio construction methods are either agnostic to the effects of idiosyncratic shocks (standard factor models) or to the latent data structure driving systematic returns (recent graph-based approaches).

arXiv Machine Learning
Jun 26

A Generalization Theory for JEPA-Based World Models

arXiv:2606. 27014v1 Announce Type: new Abstract: Joint Embedding Predictive Architectures (JEPAs) have recently emerged as a promising paradigm for world modeling by learning predictive dynamics in a latent space rather than generating future observations at the input level.

By Jingyi Cui, Qi Zhang, Hongwei Wen, Yisen Wang
arXiv Machine Learning
Jun 30

Large and Deep Factor Models

arXiv:2402. 06635v3 Announce Type: replace-cross Abstract: We show that a deep neural network (DNN) trained to construct a stochastic discount factor (SDF) admits an additive decomposition separating nonlinear characteristic discovery from the pricing rule that aggregates them.

By Bryan Kelly, Boris Kuznetsov, Semyon Malamud, Yuan Zhang
arXiv AI
Sep 18

Cross-Sectional Asset Retrieval via Future-Aligned Soft Contrastive Learning

The paper introduces Future‑Aligned Soft Contrastive Learning (FASCL), a representation learning framework that uses pairwise future return correlations as continuous supervision to improve asset retrieval. FASCL’s soft contrastive loss aligns retrieved assets with correlated future returns, and the authors propose a new evaluation protocol to directly assess future trajectory similarity. Experiments on 5,631 US‑listed securities outperform 14 baselines in future return correlation, rank information coefficient, trend consistency, and gross Sharpe ratio across various retrieval depths and basket sizes.

By Hyeongmin Lee, Chanyeol Choi, Jihoon Kwon, Yoon Kim, Alejandro Lopez-Lira, Wonbin Ahn, Justin Xu, Srijan Sood, Qingsong Wen, Chun-Li Yang, Yongjae Lee
arXiv AI
Sep 2

Agentic Empirical Asset Pricing: Methodological Foundations

The paper introduces Agentic Empirical Asset Pricing (AEAP), a framework where autonomous LLM agents conduct the entire scientific discovery process for asset pricing. It outlines AEAP’s core components, critiques current evaluation methods that only test outputs, and proposes a new reference architecture with rigorous standards for factor discovery and out‑of‑sample backtesting. Using this framework, the authors evaluate SEADS against five baselines on US equity panels, finding no single metric consistently ranks the systems and highlighting the need for multi‑axis evaluation and rolling re‑execution to assess reliability of the discovery process.

By Yingjian Pan, Xiaowei Ding, Kay Giesecke