Investing 101: Foundational Rules for Building Long-Term Wealth.

There is limited financial education during medical training, despite physicians attaining high lifetime incomes and facing complex financial decisions. As a result, many radiologists enter practice with limited knowledge in personal investing and wealth management. This article presents a practical, evidence-informed framework for long-term investing tailored to physicians. We propose four core principles. First, limit exposure to higher risk assets such as individual stocks and cryptocurrencies to a small portion of the portfolio, given the risks of concentration and higher volatility and range of returns. Second, build the foundation of wealth using broadly diversified, low-cost index funds rather than actively managed funds, which have historically underperformed after fees. Third, select a reasonable asset allocation and maintain it consistently through market cycles, emphasizing simplicity and behavioral discipline. Fourth, prioritize a high and consistent savings rate, ideally at least 20% of gross income and begin investing early to maximize the benefits of compounding. Together, these principles emphasize that successful investing is driven less by security selection and more by disciplined adherence to simple, long-term strategies. The objective is not to maximize short-term returns, but to achieve durable financial independence and flexibility, enabling physicians to align professional activity with personal and financial goals.