The Gallio Letters

Timeless letters on investing with patience and clarity. Learn the fundamentals of stocks, ETFs, compound interest, and long-term strategy.

Getting Started

What Is Investing?

Understand the fundamentals of investing and why regular people can build wealth by owning pieces of businesses.

What Is a Broker and How to Choose One

Understand what brokers do, the different types available, and what to look for when choosing one. A practical guide to finding the right broker for your investing.

Core Concepts

What Is Diversification?

Learn why diversification reduces risk, how to actually do it, and why most investors still get it wrong.

What Is an Index Fund?

Understand how index funds work, why they're simple, and how they fit into a straightforward investing approach.

Investor Mindset

On Stoic Investing

Focus on what you control, accept what you cannot, and build from there.

When to Sell

Understand when it actually makes sense to sell investments, and all the reasons you shouldn't (but think you should).

Why Investors Lose Money

Understand the behavioral and strategic mistakes that cause investors to underperform the market and lose wealth.

Long-Term Strategy

Practical Knowledge