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Python in Excel 3: Advanced Financial Modeling with LLMs and CoPilot

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Reactive Publishing
In Python in Excel 3, Hayden Van Der Post returns with the most advanced guide yet, taking financial modeling into the age of AI. This isn’t just another Excel book—this is the future of finance, where Python, CoPilot, and large language models (LLMs) converge to automate, accelerate, and transform your entire workflow.

What You’ll Seamless Python Build and execute Python code directly inside Excel using Microsoft’s native Python-in-Excel engine.

LLM-Augmented Leverage GPT-style AI models to generate assumptions, scenarios, and even write DAX/Excel formulas.

CoPilot for Automate complex modeling with natural language, create dashboards in seconds, and scale analysis beyond human limits.

Real-World Dynamic cash flow models, valuation frameworks, Monte Carlo simulators, and FP&A dashboards, fully automated.

Risk, Return & Apply machine learning to model uncertainty, optimize decisions, and explain it all to your boss with clarity and charts.


Who This Is professionals, data-savvy CFOs, and financial analysts tired of manual grind

Quantitative Excel users who want to go beyond VBA

Startup founders, investment professionals, and anyone who wants to work 5x faster and 10x smarter


Why This Book 2025, your edge is not just technical, it’s augmented.
Let Excel talk to Python. Let CoPilot handle your grunt work. Let LLMs brainstorm your next model.

This book is your operating manual for that new financial reality.

753 pages, Kindle Edition

Published August 5, 2025

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About the author

Hayden Van Der Post

1,070 books5 followers

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