Managing your own investments can feel empowering — and for many people, it genuinely works well. But for those thinking about retirement or already living in it, DIY investing carries hidden risks that don’t always show up on your monthly statement. In a special Evergreen edition of The Tom Dupree Show, host Tom Dupree and portfolio manager Mike Johnson break down what the FINRA Investor Education Foundation and decades of real-world experience confirm: the biggest costs of doing it yourself are rarely the ones you can see.
Whether you’ve been successfully picking your own stocks for years or you’re simply rolling over old 401(k)s and hoping for the best, this conversation is worth your time — especially if no one has ever looked at the full picture of your retirement income strategy.
What the Data Says About DIY Investor Returns
Tom Dupree opened the episode with a statistic that catches most self-directed investors off guard. Research from DALBAR’s Quantitative Analysis of Investor Behavior shows that the average DIY investor significantly underperforms the S&P 500 over a 20-year period — not because of bad stock picks, but because of behavior.
“People aren’t gonna get it right all the time,” Tom said. “And when you’re doing all your own thinking, there may be times when you have to bounce it off of somebody else — and you may or may not have that person to do it with.”
The culprit isn’t ignorance. It’s the “committee of one” problem — making every buy, sell, and hold decision alone, without an outside perspective to catch emotional blind spots or structural weaknesses in the portfolio.
The Real Price of One Bad Decision
To make the math concrete, Tom walked through a straightforward example. If a retiree sold $300,000 at a market bottom and sat in cash for just 60 days, missing approximately 15% in recovery, that’s $45,000 in lost growth — not from a market crash, but from one reactive decision made at the worst possible moment.
The SEC’s Office of Investor Education has long cautioned against market timing for this exact reason. As Tom put it, “Fear or hope — neither one is a strategy.”
Miss the five largest single-day market gains in any given decade, and your annualized return drops from roughly 10% toward the 6–7% range. Miss the 20 largest moves, and your returns are barely better than bonds. That’s the cost of being reactive in a market that rewards patience and discipline.
The Concentration Trap: Why “Diversified” Portfolios Aren’t Always Diversified
Mike Johnson pointed to one of the most common patterns he sees when new clients come in from the DIY world: heavy concentration in a small number of stocks — often in a single sector.
“A lot of them have been concentrated in tech,” Mike said. “And that served them well, for the most part. But they’re heavily concentrated — not just in number of names, more specifically heavily concentrated in a particular sector. And when things turn in that sector, it’s painful.”
This matters more than most people realize. Even investors who believe they’re diversified by owning an S&P 500 index fund may be surprised to learn that the index is market-cap weighted — meaning the largest (and often most expensive) companies make up a disproportionate share of every dollar invested. Tom made a point worth sitting with: a single well-managed conglomerate like Berkshire Hathaway may actually offer more true diversification than an S&P 500 index fund, simply because of what it owns across unrelated industries.
The question isn’t how many stocks you hold. It’s how those holdings interact with each other — and whether your exposure is calibrated to your actual retirement income needs, not just the structure of an index.
Learn more about how Dupree Financial Group approaches this differently on our Investment Philosophy page.
What “Monitoring” Really Means — and What Most DIY Investors Miss
There’s a big difference between watching your account balance go up and down and actually monitoring a portfolio. Mike broke this down clearly.
“In their mind, monitoring is looking at the market value on a monthly basis,” he said. “Real portfolio monitoring is trying not to be reactive — but proactive.”
Proactive monitoring means tracking individual holdings, understanding why you own what you own, making calls to investor relations departments, and asking forward-looking questions about how a company will respond to interest rate changes, sector shifts, or earnings surprises. It means asking not just “what happened?” but “what might happen — and are we positioned for it?”
That level of ongoing research is what separates passive account-watching from actual portfolio management. It’s also what the team at Dupree Financial Group does every day on behalf of clients — including regular investor relations calls that the average individual investor simply doesn’t have the time, access, or framework to conduct.
You can follow their ongoing market insights in the Market Commentary archive.
The Spouse Problem Nobody Talks About
One of the most powerful — and most overlooked — conversations in this episode centers on what happens to a portfolio when the person managing it is no longer around.
Tom shared a real example from his career: a widow living in genuinely difficult financial circumstances, not because she lacked assets, but because her late husband had left her strict instructions never to sell their stock holdings — two positions that weren’t generating nearly enough income for her to live on. She had $300,000 in principle and was struggling to get by on dividend income that wasn’t meeting her basic needs.
“I thought it was kind of sad,” Tom said. “She had $300,000 in principle and was almost eating dog food. And it was because those stocks did not throw off enough income.”
It’s a story that repeats itself in different forms. The DIY investor — typically the husband — manages the portfolio with skill and care, but the spouse has little to no familiarity with what they own or why. When something happens, the surviving spouse inherits not just grief, but financial complexity they weren’t prepared for.
The solution Mike and Tom described isn’t complicated: bring your spouse to the meetings. Let them hear the explanations. Let them ask questions. Build the relationship with an advisor while both of you are still healthy and engaged, so that if and when the transition comes, it’s one less source of pain.
“The spouse being educated on what’s going on with their money makes that transition less painful,” Mike said. “It’s one less thing they have to worry about.”
The U.S. Department of Labor’s retirement planning resources emphasize shared financial literacy for exactly this reason.
Key Takeaways from This Episode
- The committee of one is a structural risk. Without a second perspective, emotional decisions — selling at the bottom, holding too long, missing a shift — are much harder to avoid.
- Concentration is the hidden risk in most DIY portfolios. Being heavily weighted in one sector, no matter how well it has performed, leaves a retirement portfolio exposed when that sector turns.
- Real monitoring is proactive, not reactive. Watching a balance go up or down is not portfolio management. Proactive management means understanding each holding and making decisions before the market forces your hand.
- Fees exist whether you see them or not. Mutual fund expense ratios, ETF fees, and most importantly — the cost of avoidable mistakes — are real costs even when they don’t appear as line items.
- The surviving spouse deserves a plan. A DIY portfolio has no continuity plan built in. A trusted advisor relationship creates one.
- A portfolio review costs you nothing but your time. Dupree Financial Group is fee-based with no commissions, which means an honest, impartial look at what you have — with no pressure and no sales pitch.
Frequently Asked Questions
What are the hidden costs of DIY investing in retirement?
The most significant hidden costs of DIY investing in retirement include emotional decision-making at market extremes, portfolio concentration in a single sector, missed recovery gains from reactive selling, and the absence of a continuity plan for a surviving spouse. Research from DALBAR shows that average DIY investors underperform the S&P 500 over 20-year periods, largely due to behavior rather than stock selection.
When should a DIY investor consider working with a financial advisor?
The right time to consider working with a financial advisor is when the stakes are higher — when your portfolio is larger, your timeline to retirement is shorter, and bad decisions have less time to recover. Other key triggers include approaching retirement, the death or illness of a spouse who handles finances, significant market volatility, or a portfolio that has grown heavily concentrated in one area.
What is portfolio concentration risk and why does it matter for retirees?
Portfolio concentration risk occurs when a significant portion of your investments is held in one stock, sector, or asset type. For retirees, this is especially dangerous because there is less time to recover from a downturn. A tech-heavy portfolio that performed well during a bull market can suffer severe losses when that sector rotates — and unlike younger investors, retirees may not be able to wait for a recovery.
Is a fee-based financial advisor different from a commission-based broker?
Yes — significantly. A fee-based, fiduciary advisor like Dupree Financial Group charges a management fee and earns no commissions from products sold. This eliminates the conflict of interest that exists when an advisor profits from recommending certain funds or products. The SEC’s guide to investment advisers explains the fiduciary standard and how it differs from the suitability standard applied to brokers.
Can a financial advisor help manage my 401(k)?
Yes. Dupree Financial Group can help clients evaluate and manage 401(k) accounts, not just personal brokerage or IRA accounts. If you have retirement accounts from multiple employers or are evaluating rollover options, a Personalized Portfolio Analysis can help clarify what you have, what it’s costing you, and whether it’s structured to generate the income you’ll need.
Ready to See What Might Be Missing?
If you’ve been managing your own portfolio and it’s working, that’s worth acknowledging. But if no one has ever looked at the complete picture — the structure, the income potential, the concentration risk, the plan for your spouse — you owe it to yourself to find out what you might be missing.
A complimentary portfolio review at Dupree Financial Group costs you nothing but your time. There are no products to sell, no commissions, and no pressure. Just 47 years of investment management experience applied honestly to your situation.
Call us at (859) 233-0400 or schedule your complimentary consultation online — and start knowing exactly what your money is doing and why.
Listen to more episodes and access the full Market Commentary archive at dupreefinancial.com/podcast.
Disclosure: Dupree Financial Group is an SEC-registered investment adviser. Registration does not imply a certain level of skill or training. The information contained in this blog post is for informational purposes only and should not be construed as personalized investment advice. Past performance is not indicative of future results. Investing involves risk, including the possible loss of principal. All examples and statistics referenced are for illustrative purposes only and do not represent actual client results. Please consult with a qualified financial professional before making any investment decisions. To learn more about Dupree Financial Group’s services, fee structure, and investment approach, visit dupreefinancial.com/about-us or contact our office directly.