AI-powered stock analysis & quantitative research

Machine learning models, backtesting frameworks, and data-driven trading strategies — from research to deployment.

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·13 min read

Triple-Barrier Labeling and Meta-Labeling in Python: A 2026 Implementation Guide

A practical Python guide to path-aware trade labels, secondary prediction filters, overlap controls, and reproducible evaluation for quantitative research.

methodologymachine-learningbacktesting
·9 min read

AI Markets Weekly: SEC Tokenized Stocks, AI Exposure, Agents

QuantBrainAI's AI-markets roundup separates audited facts from vendor claims across SEC tokenized-stock rules, an AI-exposure factor, and agent execution rails.

newsquantstock-analysis
·12 min read

OpenBB Open Data Platform Review 2026: Open-Sourced, AGPL, and What It Means for Quants

Desk-research review of the OpenBB Open Data Platform after its open-sourcing announcement, covering surfaces, pricing, licensing, and adoption verdicts.

tool-reviewquantdata-pipeline
·10 min read

Purged K-Fold Cross-Validation Python: Stop Label Leakage

Learn how purged k-fold cross-validation in Python removes overlapping-label leakage and why a trailing embargo matters for financial machine learning.

methodologymachine-learningbacktesting
·8 min read

NautilusTrader Review 2026: Best Open-Source Algo Engine?

An independent review of NautilusTrader, the open-source, Rust-native algorithmic trading engine, covering architecture, backtesting, adapters, and pricing.

tool-reviewquanttrading
·11 min read

How to Model Transaction Costs in a Backtest (Python)

How to model transaction costs in a backtest — build spread, commission and power-law impact into your Python simulator so your net results reflect real fills.

methodologybacktestingtrading