Short answer: for the vast majority of dentists, low-cost index funds outperform active stock-picking and most actively managed funds over time — not because indexing is clever, but because fees and human behavior quietly drag down active returns. It’s the boring answer, and decades of evidence keep confirming it.
What’s the difference?
An index fund simply owns everything in a market (say, the whole U.S. stock market) at rock-bottom cost. An active fund or stock-picker tries to beat the market by choosing winners — charging more to try. The question isn’t whether great active managers exist; it’s whether you can reliably identify them in advance and whether their edge survives their fees.
Why do index funds usually win?
- Fees compound against you — a percentage point of extra cost per year is enormous over decades.
- Most active managers underperform their benchmark over long periods, and past winners rarely repeat.
- Indexing is tax-efficient — less trading means fewer taxable gains in a taxable account.
- It removes the temptation to tinker, which is where many investors hurt themselves.
Does active investing ever make sense?
In narrow cases — certain less-efficient markets, specific tax situations, or a small “satellite” allocation an investor understands. But for the core of a dentist’s portfolio, a diversified, low-cost index approach is the sensible default. If you want the tax advantages of owning individual stocks without stock-picking, look at direct indexing rather than active management.
What actually matters more than this debate?
Two things bigger than fund selection: your asset allocation and your behavior. Staying diversified, keeping costs low, and not selling in downturns matters far more than picking the perfect fund. And for dentists specifically, diversifying away from the practice is the concentration risk worth solving.
Frequently asked questions
For most investors, yes, over long periods. After fees, the majority of active funds underperform their benchmark index, and identifying the few winners in advance is difficult. Low-cost index funds keep more of the market’s return, which is why they’re the sensible default for most dentists.
For most, no. Individual stock-picking underperforms a diversified portfolio for the vast majority of investors after risk and fees, and it adds concentration a dentist (already concentrated in a practice) doesn’t need. A diversified, low-cost portfolio is the better core.
Sources
Founder & Financial Planner · Investment Adviser Representative · Series 63 & 65
Ian McGinnis is the founder of Dental Wealth Partners and a fee-only financial planner dedicated to dentists. As an investment adviser representative (Series 63 and 65), he built the firm to give dentists coordinated, fiduciary advice across their practice, taxes, investments, retirement plans, and long-term goals — the whole picture in one strategy. A graduate of Belhaven University, Ian previously worked at Davis Private Wealth, MML Investors Services, and Northwestern Mutual, and is based in the Jackson, Mississippi area. He is the author of The Wealthy Dentist and hosts the Smiles & Cents podcast.
Keep reading
- How should a dentist invest?Most dentists build wealth with a boring, diversified, low-cost portfolio — after maxing tax-advantaged accounts and diversifying beyond the practice.
- How should a dentist set their asset allocation?Asset allocation — your split between stocks, bonds, and cash — drives most of your returns and risk. How dentists should set and maintain theirs.
- Direct indexing and direct investing for dentists, explainedDirect indexing lets you own the individual stocks of an index directly — capturing index-like returns plus tax-loss harvesting. When it fits a high-earning dentist.