After working with families who have accumulated substantial wealth, I’ve learned that the way you structure your portfolio matters as much as what’s in it.
The mutual fund versus individual stock question isn’t just about performance. Investors with significant assets need to figure in taxes, control, flexibility, and how efficiently their money compounds over decades.
Let me walk you through what actually matters when building portfolios at this level.
The Tax Reality That Changes Everything
Start with taxes, because this is where many investors leave money on the table.
According to research from Bernicke & Associates, mutual funds create tax liabilities you can’t control. When a fund manager sells appreciated stocks, all shareholders pay capital gains taxes proportionally, even investors who just bought in and never benefited from those gains.
You’re essentially paying taxes on someone else’s profits.
Individual stocks work differently. You decide when to sell. You control when capital gains get triggered. According to Finley Davis Private Wealth research, this control becomes particularly valuable for high-net-worth investors who can strategically time sales to minimize tax impact.
The step-up in basis at death eliminates tax on previously earned gains for your beneficiaries. That benefit applies to individual stocks held at death, not to mutual fund distributions you’ve already paid taxes on.
Cost Differences That Compound
According to the Investment Company Institute, the average actively managed stock fund charges 0.50% annually. Index funds average 0.06%.
Individual stocks held at most national brokerages cost nothing annually. Zero ongoing fees.
Over 20 or 30 years, that difference compounds significantly. For every $1 million invested, you’re paying $5,000 annually in a typical actively managed fund. That’s $100,000 over 20 years, not including market growth on those dollars.
The math matters when you have substantial assets.
Tax Loss Harvesting and Direct Control
According to BlackRock research on high-net-worth tax strategies, individual stock ownership enables ongoing tax-loss harvesting throughout the year.
You can sell positions showing losses to offset gains elsewhere in your portfolio. This shouldn’t be an annual exercise. It’s something you can do strategically whenever market conditions create opportunities.
Mutual funds don’t offer this flexibility. The fund manager makes all buy and sell decisions. You have no ability to harvest losses or control the timing of gains.
According to research from Finley Davis Private Wealth, direct indexing enables investors to purchase individual stocks that comprise an index while allowing customized tax management. You get diversification benefits plus the ability to harvest losses and manage capital gains more effectively than traditional index funds.
The Diversification Question
Mutual funds provide instant diversification. That’s their primary selling point.
According to financial experts at U.S. News & World Report, mutual funds are baskets of stocks that can include hundreds of different holdings, offering more diversification than individual stock picking.
The counterargument: financial experts recommend holding at least 15 individual stocks to achieve adequate diversification. With zero-commission trading and the ability to buy fractional shares, building a diversified portfolio of individual stocks is more accessible than ever.
There is now the ability to build a diversified portfolio of individual stocks without the barriers that existed in the past when commissions and minimum purchase requirements made this approach impractical for most investors.
Active Management Reality Check
According to Bankrate research, actively managed funds have typically underperformed passive funds over long time periods, despite charging higher fees.
The promise of active management is that professional fund managers will outperform the market through superior stock selection and timing. The reality doesn’t consistently support that promise.
According to data compiled by NerdWallet, even with the best expertise, actively managed investments rarely beat the market over the long term.
When Mutual Funds Make Sense
Mutual funds aren’t inherently wrong. They serve specific purposes effectively.
Mutual funds work well for investors who want fund managers to handle all research and management decisions, don’t have time to monitor individual stocks, and prefer a more hands-off approach to investing.
For retirement accounts like 401(k)s and IRAs, where tax consequences matter less, mutual funds provide an efficient way to gain diversified exposure.
The issue is using them in taxable accounts, where the tax inefficiency becomes expensive over time.
The Wealthy Investor Approach
According to research by Cerulli on high-net-worth markets, tax minimization is as important an objective for wealthy clients as wealth preservation.
BlackRock research on after-tax allocation strategies confirms that high-net-worth investors who hold most of their assets in taxable accounts need portfolios designed to deliver optimal after-tax returns.
What that typically means in practice:
Tax-advantaged retirement accounts can hold mutual funds or index funds. The tax protection of these accounts eliminates the primary disadvantage of mutual funds.
Taxable accounts benefit from individual stocks or tax-efficient ETFs. This is where you want maximum control over the timing of gains and the ability to harvest losses throughout the year.
Portfolios are usually structured to meet multiple goals, including long-term growth, capital preservation, tax efficiency, and estate planning.
Risk Management at Scale
High-income individuals often face marginal tax rates exceeding 37%, making every percentage point of tax efficiency meaningful.
Individual stocks allow you to be strategic about which positions you hold long-term and which you rotate based on market conditions and your tax situation in any given year.
Mutual funds make these decisions for you, regardless of whether the timing works for your specific tax circumstances.
The Liquidity Factor
According to Kiplinger’s analysis, stocks can be bought and sold at any time during market hours, providing greater liquidity. Mutual funds typically trade once daily at net asset value, making them slightly less flexible for immediate transactions.
When you need to raise cash or rebalance, individual stocks provide more precision and control.
Estate Planning Considerations
For investors focused on wealth transfer, the structure matters.
According to SmartAsset research, concentrated stock positions are common among wealthy individuals who built wealth through a single company, whether from founding a business or accumulating shares over years of employment.
These concentrated positions require specific management strategies. You can’t effectively manage concentrated positions inside mutual funds. You need the flexibility that comes with direct ownership.
Building Your Approach
Neither approach is universally better. The proper structure depends on your specific situation.
Consider individual stocks in taxable accounts if you have substantial assets, care about tax efficiency, want control over timing of gains and losses, and are willing to work with an advisor who actively manages these positions.
Consider mutual funds or index funds if you’re investing primarily in tax-advantaged retirement accounts, prefer a completely hands-off approach, or don’t have enough assets to make individual stock tax management worthwhile.
Many sophisticated portfolios use both. Mutual funds in retirement accounts where tax efficiency doesn’t matter. Individual stocks in taxable accounts are where every bit of tax savings compounds over time.
What This Means for You
According to BlackRock research, two-thirds of high-net-worth advisory teams highlight tax minimization as a key offering for their clients.
That emphasis exists for good reason. At significant asset levels, the difference between tax-efficient and tax-inefficient portfolio structures can mean hundreds of thousands of dollars over a lifetime.
The mutual fund versus individual stock decision isn’t about picking winners or timing the market. It’s about structuring your portfolio so you keep more of what you earn.
That requires understanding the tax implications, costs, and control factors that separate these approaches. It requires working with advisors who think beyond just performance numbers to consider after-tax returns.
Your investment approach should match your circumstances. At substantial asset levels, that means being strategic about where you use mutual funds and where individual stock ownership provides better long-term results.
Take the time to understand these differences. The structure of your portfolio will shape your results as much as the individual investments you choose.
This information is for educational purposes only and is not intended as investment, tax, or legal advice. Past performance is not indicative of future results. Investment advisory services offered through Summit Financial, LLC, a SEC Registered Investment Advisor.
Sources:
- Bankrate. “Mutual Funds Vs. Stocks: Which Should You Invest In?” April 28, 2025. https://www.bankrate.com/investing/stocks-vs-mutual-funds/
- U.S. News & World Report. “Mutual Funds vs. Stocks: Which Are Better Investments?” April 16, 2024. https://money.usnews.com/investing/articles/mutual-funds-vs-stocks-which-are-better-investments
- SmartAsset. “Pros and Cons: Mutual Funds vs. Stocks.” July 28, 2021. https://smartasset.com/investing/mutual-funds-vs-stocks
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