Foundations of Investing for Early Retirement

The FIRE movement converged on a relatively simple investment philosophy: broad diversification through low-cost index funds, held for the long term, with an asset allocation calibrated to your timeline and risk tolerance. This apparent simplicity rests on a substantial body of evidence from financial economics. Understanding why this approach works — and what its genuine limitations are — helps you hold to it during the inevitable periods of market volatility and doubt. By the end of this course you will be able to explain the evidence base for passive index investing, describe the key characteristics of index funds and ETFs, and construct a rationally defensible asset allocation appropriate for a long-horizon early retirement goal. What you will learn: - Why passive index investing has outperformed active management over most long time horizons, and the research that established this finding - How index funds and ETFs work, including how they track an underlying index, their cost structure, and the difference between them - The role of total market funds versus sector or factor funds in a simple, FIRE-aligned portfolio - Asset allocation fundamentals: the risk-return trade-off between stocks and bonds and how it changes across an accumulation timeline - How to evaluate expense ratios and why even small cost differences compound dramatically over decades - Tax location: which assets belong in taxable accounts versus tax-advantaged accounts for maximum after-tax returns - Common portfolio structures used in the FIRE community — three-fund, two-fund, and target-date approaches — and the reasoning behind each - Behavioral risks in long-term investing: panic selling, market timing, and performance chasing, and why they destroy returns The course presents the investment concepts through worked numerical examples that show the compounding effect of costs, returns, and time across a 20- to 30-year accumulation period. Case studies illustrate how different portfolio choices play out across historical market conditions. Reflection prompts guide you to think through which principles apply most directly to your own situation. This course is designed for individuals new to investing or new to the FIRE investment philosophy who want a clear conceptual foundation before making portfolio decisions. No prior investment knowledge is required.