
The Biggest Mistake Beginner Investors Make - and How to Avoid them
Sound Investing
The high-fee trap and its long-term cost
Jackie asks about fees; Paul quantifies how advisor fees and higher expenses compound into millions lost over decades.
In this practical and inspiring ETFatlas podcast episode, host Jack Lempart welcomes Paul Merriman for a return conversation focused on the biggest mistakes beginner investors makeâand how to avoid them.
The discussion reveals why most investing errors are emotional, not technical. Paul emphasizes that successful investing is usually simple, though almost never easy.
Paul Merriman draws on decades of experience as an educator, advisor, and founder of the Merriman Financial Education Foundation to spotlight key pitfalls:
- Trusting the wrong advice
- Starting too late with investing
- Letting emotions drive decisions
- Chasing recent performance
Paulâs conversation goes further, sharing actionable tips:
- How defensive investing and diversification protect you from major mistakes
- Practical ways to automate good habits and avoid behavioral biases
- Insights from both US and European market examples
Youâll also hear why academic research has shaped todayâs best investment practices. Paul strongly advocates:
- Automating decisions wherever possible
- Broad diversification
- Maintaining discipline during market turbulence
Listeners receive clear advice on keeping investing simple, avoiding high fees, and building portfolios designed to withstand uncertainty.
The episode closes with tips for further readingâincluding free educational resources and helpful linksâto support every investorâs learning journey.
Agenda
- Paul Merrimanâs journey from stockbroker to financial educator and foundation founderâ
- Introduction to the most costly mistakes for beginners and how they can affect lifetime wealthâ
- Why trusting the wrong advice is potentially the biggest error investors makeâ
- The importance of choosing academically sound, evidence-based sources over industry âexpertsâ or neighborsâ
- Analysis of how starting too late in investing can dramatically reduce future wealthâ
- The emotional traps beginners face and the impact of behavioral biases on decision-makingâ
- The problem of performance chasing and recency bias in investment choicesâ
- Automating investments and the value of regular, disciplined contributionsâ
- Why diversification is considered âthe only free lunchâ in investing by expertsâ
- Advantages of keeping portfolios simple with solutions like target-date funds and low-cost ETFsâ
- Examples illustrating the massive impact of investment fees over decadesâ
- The difference between defensive and offensive strategies in long-term market successâ
- Real-world lessons from market history, including US, Europe, and Japanâ
- How to avoid paralysis from choice overwhelm in a landscape of thousands of ETFsâ


