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Quant LetterNo. 123

December 2025, Week 3

93 items across 9 sections, as sent to readers on 19 December 2025. Paper titles open their ML-Quant page; ↗ goes to the source.

arXiv

Quantitative-finance and ML-for-finance preprints from arXiv.

14 items

Finance7

01

RL for Deep Hedging

The article describes a reinforcement-learning method for hedging equity index options that enhances risk-adjusted returns while managing turnover and costs.

2 sharesSource ↗

02

Interpretable Trading Validation

The authors introduce a walk-forward validation technique for algorithmic trading that focuses on interpretability and robust testing, offering modest gains and strong protection against losses.

2 sharesSource ↗

03

Static Framework for Pricing

This paper presents a model-free method for pricing fixed-income assets and replicating liabilities, linking no arbitrage with a positive discount curve to guide investment and regulatory approaches.

1 sharesSource ↗

04

Consensus-Bottleneck for Stock Predictions

The Consensus-Bottleneck Asset Pricing Model uses a neural network to mimic analyst reasoning, showing how investor beliefs influence asset prices and enhancing long-term predictions for U.S. stocks.

1 sharesSource ↗

05

Hybrid ML for Fast Option Pricing

A new algorithmic framework merges a smooth offset method with machine learning for quicker pricing of path-independent options, vastly speeding up evaluations compared to older techniques.

1 sharesSource ↗

06

SVLSTM for Volatility Forecasting

A combined model of Stochastic Volatility and Long Short Term Memory networks offers better volatility predictions for the S&P 500, outperforming traditional models for improved risk assessment.

1 shares2 citations todaySource ↗

Economics1

01

Aluminium Arbitrage in Global Trade

A study found that efforts to reduce carbon emissions in the aluminum industry have led to illegal trade practices, highlighting the need for new customs enforcement strategies.

1 sharesSource ↗

Miscellaneous4

01

Enhancing Parameter Estimation in SDEs

The SigMA neural architecture improves parameter estimation in stochastic differential equations using path signatures and self-attention, outperforming traditional methods across multiple datasets.

1 sharesSource ↗

02

Elicitability and Deep Learning for MV-FBSDEs

A new numerical method combines elicitability and deep learning for McKean-Vlasov stochastic equations, enabling efficient training of neural networks without expensive simulations, tested successfully on financial models.

1 sharesSource ↗

03

Smart Data Portfolios for AI Governance

The Smart Data Portfolio framework defines data governance in AI as a trade-off between information risk and fairness, creating a Governance-Efficient Frontier for optimal data allocation in AI services.

1 sharesSource ↗

04

Adaptive Learning for Stochastic Control

An adaptive reinforcement learning algorithm enhances learning in controlled diffusion processes by partitioning state-action spaces, providing theoretical guarantees and effective results in applications like portfolio selection.

1 shares1 citation todaySource ↗

Crypto & Blockchain1

01

Bitcoin ETF Approval: Changing Dynamics with Traditional Assets

Changing Dynamics with Traditional Assets: In January 2024, the approval of a Bitcoin Spot ETF boosted interest from big investors and made Bitcoin more closely linked to stock markets, while its connections to gold remained steady and its relationship with the U.S. Dollar stayed negative.

1 shares1 citation todaySource ↗

Historical Trending1

01

Reinforcement Learning in Finance

Reinforcement learning has potential to enhance financial decisions in market making, but needs simpler and clearer models that better match real-world industry challenges to be effectively used.

2 shares1 citation todaySource ↗

SSRN

Working papers in finance and economics from SSRN.

10 items

Financial10

01

Myopic Stock Pricing

US. stock analysts' short-term focus leads to inaccurate price predictions due to varying expectations over different time frames.

518 sharesSource ↗

02

Factor Return Cyclicality

Most of the 150 equity factors examined show positive returns but fail to deliver excess returns after accounting for risk, especially in downturns.

4,399 shares7 citations todaySource ↗

03

Romania's Finance Challenges

Romania struggles to attract sustainable investments because its major companies have low transparency and high greenhouse gas emissions.

152 shares3 citations todaySource ↗

04

Decarbonization Financing

The study highlights key financial tools in Romania, like green bonds and loans, which can help transition to a low-carbon economy, with banks playing a major role.

117 shares1 citation todaySource ↗

05

Option Volatility Expansions

A new method for analyzing financial data helps test for sudden volatility changes, with evidence from SP500 options indicating significant variation.

139 shares2 citations todaySource ↗

07

Factor Return Patterns

Most equity factors provide positive returns over time but have low market risk, with adjusted returns showing stronger performance, especially in downturns.

4,399 shares7 citations todaySource ↗

08

Romania's Green Finance Plan

Romania struggles to attract sustainable foreign investments due to its major companies offering low transparency as global sustainable finance regulations increase.

152 shares3 citations todaySource ↗

09

Decarbonization Finance in Romania

The research highlights financial tools in Romania that can facilitate a shift to a low-carbon economy, focusing on the importance of banks and green financing.

117 shares1 citation todaySource ↗

10

Asymptotic Expansions for Options

A new mathematical method is created to analyze price changes in SP 500 options, helping to identify instances of volatility spikes in financial data.

139 shares2 citations todaySource ↗

RePEc

Economics working papers from RePEc's NEP field reports.

30 items

Finance9

01

Efficient KSE-30 Allocation

The article uses machine learning to identify factors causing declines in the Pakistan Stock Exchange and suggests an optimal portfolio strategy focusing on volatility and market trends.

10 sharesSource ↗

02

Adaptive Trading in Emerging Markets

With the rise of algorithmic trading, a new Automated Adaptive Trading System helps manage risks in emerging markets while still allowing for market exposure during downturns.

9 sharesSource ↗

03

Risk Parity with Heavy Tails

This study shows that using expected shortfall for risk parity portfolio optimization can improve performance during market stress by better handling fat-tailed returns.

9 sharesSource ↗

04

Testing Market Hypothesis with Sharpe Ratio

The research finds that Sharpe Ratio-based trading strategies are more effective than buy-and-hold methods across global indices, supporting the Adaptive Market Hypothesis through identified market inefficiencies.

8 sharesSource ↗

06

Optimal Pension Strategies

The study introduces a method to manage pension plans by adjusting benefits and optimizing investments to enhance expected utility.

5 sharesSource ↗

07

Window Analysis for Trading Strategies

A new window analysis method improves efficiency evaluation for decision-making units, addressing shortcomings of traditional methods in foreign exchange and utility sectors.

5 sharesSource ↗

08

Early Exercise Risk Premiums in Options

The research explores how early exercise of American puts impacts their returns compared to European puts, highlighting changes in profitability for popular option strategies.

4 sharesSource ↗

Statistical3

Machine Learning5

02

Enhanced ML for Market Risk

Two deep learning frameworks are introduced to improve the estimation of Value at Risk and Expected Shortfall, boosting risk management for financial institutions.

6 sharesSource ↗

Deep Learning3

03

ML vs. Deep Learning for Oil Price Forecasting

The research contrasts machine learning and deep learning for oil price forecasting during crises, revealing that the LSTM deep learning method is more accurate and adaptable than traditional techniques.

4 sharesSource ↗

Historical Trending10

01

Predicting VIX Trends with ML

The CBOE Volatility Index (VIX) can be predicted more effectively using machine learning and economic indicators, with jobless claims data being particularly significant.

12 sharesSource ↗

02

Eurozone Banks: DL vs Traditional Models

DL vs Traditional Models: Traditional machine learning models achieve better results than deep learning models in predicting stock price movements for major Eurozone banks due to limitations in deep learning datasets.

7 sharesSource ↗

05

Profile of Young Informal Workers in EU

The study examines young informal workers in the EU27, exploring their roles, industries, and motivations to understand labor market shifts influenced by the Covid-19 pandemic.

2 sharesSource ↗

07

Retail Investor Protection

This study examines misleading design practices in retail investing and suggests regulatory measures using behavioral science and AI to protect investors.

1 sharesSource ↗

08

Bank Performance Determinants

A literature review on banking performance reveals ongoing research gaps, particularly regarding digital transformation and the influence of AI.

1 sharesSource ↗

09

AI Capability and Firm Performance

Research shows that AI capabilities boost firm performance, with a data-driven culture playing a key role in this relationship for sustainable development.

1 sharesSource ↗

Papers with code

Papers that shipped their code, from the Papers with Code feed (2023-25).

6 items

Trending3

01

StepGUI: Optimizing GUI Automation

Optimizing GUI Automation: A new training system boosts GUI automation by making it more efficient, accurate, and private for real-world use.

1,450 shares

02

AI Agents: Memory Research Overview

Memory Research Overview: The survey examines agent memory research, detailing its types, functions, and future research directions.

119 shares

Rising3

01

LitePT: Efficient 3D Model

Efficient 3D Model: LitePT is a 3D point cloud model that uses a combination of convolutions and attention to enhance efficiency.

27 shares

02

ErrorFree Attention: Optimized Language Model

Optimized Language Model: ErrorFree Linear Attention (EFLA) is a quick and dependable attention method that outperforms DeltaNet in language processing tasks.

21 shares

GitHub

Repositories the letter featured.

10 items

Finance5

01

UK AI Model Evaluation

Inspect provides a framework for assessing the performance of large language models.

1,574 shares

02

Volatility Workshop 2025

QuantMinds 2025 shares insights from a workshop on rough volatility in finance.

5 shares

03

AI Investment Agent

Agentic AI presents LangGraphGemini, a tool for analyzing U.S. stock market equity.

27 shares

04

Context Data Platform

Context Data Platform for Agents encourages users to participate in a community about data collaborations for agents.

1,943 shares

05

Olares: Open-Source Cloud

Open-Source Cloud: Olares is an open-source cloud solution that empowers users to take charge of their personal data.

3,611 shares

Trending5

01

KaijuEngine: Game Engine

Game Engine: A game engine designed for creating both 3D and 2D games, using Go and Vulkan, complete with its own built-in editor.

3,482 shares

02

Polymarket: AI Trading Tool

AI Trading Tool: An AI-powered server for Polymarket enabling users to trade in prediction markets, featuring enhanced monitoring and safety tools.

97 shares

03

MistralVibe: CLI Agent

CLI Agent: A lightweight coding agent for command-line interfaces developed by Mistral.

1,808 shares

04

JustHTML: HTML Parser

HTML Parser: A simple HTML5 parser written in pure Python, needing no extra dependencies or complicated setup.

753 shares

05

Dashy: Personal Dashboard

Personal Dashboard: A customizable personal dashboard that users can host independently.

23,351 shares

Podcasts

Episodes on markets, quant methods and economics.

10 items

Quantitative5

01

Risks in Nonbank Systems

Ian Harnett highlights that systemic risks are now more prevalent in nonbank financial institutions and stresses the importance of cash flow in evaluating financial vulnerability.

11 shares

02

Price Logic in Uncertainty

Alan and Mark explore how the Federal Reserve's uncertain actions influence systematic investing, debating the significance of market prices versus narratives in understanding risks.

8 shares

03

Risk Assessment in Derivatives

Kumaran Vijayakumar reveals that analytical tools are revolutionizing risk assessment in equity derivatives by leveraging data to better understand client flows.

7 shares

04

US Rate Strategies

US Rates Strategists Teresa Ho, Ipek Ozil, and Phoebe White examine how delays in economic data and new initiatives from the Fed affect market strategies.

5 shares

05

Evolving Macro Trading Strategies

Aahan Menon advocates for shorter trading horizons in systematic macro investing, noting a marked discrepancy between labor market performance and broader economic activity.

5 shares

Related5

01

Tech Bubble Insights with Jay Pelosky

Jay Pelosky analyzes how AI, defense, and climate spending impact global growth and examines the competitive dynamics between China and the US.

5 shares

02

Politics, Borders, and Hegemons

Gary Gerstle addresses the decline of neoliberalism and the rise of nationalism in the US and Europe due to economic stress and changing political landscapes.

4 shares

03

Risk Parity with Alex Shahidi

Alex Shahidi introduces risk parity as a strategy for creating resilient investment portfolios, highlighting the need for diversification beyond traditional methods.

4 shares

04

Scott Goodwin on Investments

Scott Goodwin shares his investment philosophy and insights on credit market opportunities, clarifying that his views may not represent Goldman Sachs' stance.

4 shares

05

Amelie Chowna on Fixed Income

Amelie Chowna reflects on her career at LampG, discussing challenges and trends in fixed income investing, particularly in merging private and public credit strategies.

3 shares

Blogs

Posts from quant and economics blogs and newsletters.

10 items

Quantitative5

02

Bond Pricing with Equity Options

A new approach is suggested for pricing zero-coupon bonds to better match equity options and enhance interest rate modeling.

12 shares

03

Adaptive Portfolio Optimization

Reinforcement learning is used to create a dynamic portfolio strategy that adapts to investor preferences over time.

12 shares

Related5

01

Volatility Benchmark

The VRP benchmark for options trading is performing well with a projected 20% annual growth over eight months despite market difficulties.

7 shares

02

VRP Update

The article discusses how the expenses of childcare affect family decisions about having children.

7 shares

03

Short Volatility Success

A weekly report reviews different market areas, covering country ETFs, fixed income, currencies, and commodities.

7 shares

04

Option Insights

Short volatility strategies have been financially successful recently, even in uncertain market conditions.

7 shares

05

Childcare Costs & Fertility

Daily profit and loss data show important changes in equity curves tied to option trading success.

7 shares

X / Twitter

Posts from quant researchers on X.

1 items

Miscellaneous1

01

AI in Investment Strategies: Insights from David Wright

Insights from David Wright: David Wright from Pictet explains how his team utilizes AI technology to create practical investment strategies, improving decision-making and enhancing investment performance.

3 shares

Reddit

Threads from r/quant, r/algotrading and friends.

2 items

Quantitative1

Rising1

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