Traders work on the floor of the New York Stock Exchange (NYSE) on April 4, 2025 in New York City.
Timothy A. Clary | AFP | Getty Images
Many investors remain obsessed with the so-called “Mag 7” and the tech-driven U.S. stock market. You may need to learn some history lessons to avoid being held back by the mistakes that sunk your portfolio in the early 2000s.
Although there are differences in today’s market, the stage we are in is similar in some important ways to the period before the dot-com bubble burst. During the dot-com heyday, many market participants were overly focused on the technology sector and ended up incurring large losses.
“People get caught up in the hype,” said Seth Hickle, chief investment officer at Mindset Wealth Management in Indianapolis, Indiana. Hickle said many investors overestimated their risk tolerance by buying into tech sectors after they had already made huge profits, ignoring valuations until they saw volatility in their portfolios.
Warnings are being issued every day. JPMorgan CEO Jamie Dimon told CNBC contributor Wilfred Frost on Monday that he would not buy the stock at such a valuation. (Mr. Dimon said he also doesn’t buy long-term government bonds.) Warren Buffett recently told CNBC’s Becky Quick: “It’s hard to find value when everyone likes to gamble.”
Financial advisors say the first step is to develop a strategy and recognize that chasing profits is not a strategy. Many investors in the dot-com era were satisfied with the latter. An investment strategy should be set before investing and should also include a plan to cash out a portion of your chips. Dan Sadit, a partner at Crew Advisors in Salt Lake City, says to mitigate bad decisions based on emotion, you need to know what you’re buying, why you’re buying it, and when to stop.
Financial advisers warn that investors are prone to repeating past mistakes. Technology is at the core of the stock market, and its role in future long-term growth will continue, but there are ways to gain exposure to technology high flyers without repeating the mistakes of the dot-com era.
S&P 500 funds are meaningful technology investments
One of the problems of the dot-com era was that investors’ portfolios became too technology-heavy. The same thing could happen today if people aren’t careful. AI is rapidly reshaping society, and many investors want to buy stocks and funds to benefit from the expected growth. But many investors already have the best-performing stocks in their core portfolios, and some don’t even realize it. Aaron Ulrich, owner of Integra Financial Planning in Prospect, Kentucky, said clients often ask him about high-performing stocks like Nvidia, Tesla and Apple without knowing they were part of his company’s diversified portfolio.
Investors need to diversify, rather than picking the next big winner or investing in single-sector ETFs. Shannon Saccocia, chief wealth investment officer at Neuberger Berman in New York, said that for many investors, owning core ETFs that track the S&P 500 index is a good starting point because they offer “meaningful technology exposure” and diversification. Outside of large-cap U.S. stocks, Saccocia said investors should invest a portion of their portfolios in small-cap stocks, international companies, emerging markets and energy companies.
Ulrich said a diversified strategy is better than trying to pick the next wonder. “We don’t know the next Nvidia. The idea that we can know one stock right now that’s going to go up 2x, 5x, or 10x over the next two to five years is impossible. Those same stocks could go down significantly,” Ulrich said.
Don’t buy what you can’t afford
While the prospect of making huge amounts of money investing in a particular sector is exciting, Ulrich discusses time horizons and risk appetite with clients to help them understand how much more they can invest than their daily needs. These decisions also take long-term goals into account.
When the dot-com bubble burst, many people lost large amounts of their savings that they could not afford to lose. At the time, Sudit lived near a retired couple who had lost a significant portion of their savings investing in dot-com stocks. Her husband had invested about half of the couple’s investable assets in technology, and when the losses started piling up, they had to downsize their home and tighten their budget, leaving them unable to afford the vacations they had dreamed of, buying a new car or helping with their grandchildren’s education. Sudit said people need to be careful not to let their excitement about a particular field get in the way of reason. “You may have to miss out on opportunities because you can’t afford to take big risks.”
Limit investments in thematic sectors to 20% of your stock portfolio
Some investors are drawn to investment themes. In that case, you can consider investing thematically, but only after you have built a core stock portfolio. Hickle said that about 80% of an investor’s equity exposure (this number depends on age, time horizon, risk tolerance and other factors) should be well diversified.
To get broad exposure, the core of your portfolio may include the following ETFs: S&P500 and small-cap stocks russell 2000. of Nasdaq 100 is also a popular core holding, which does not include financials and is focused on technology (as of June 30, nearly 70% of the fund’s portfolio is in the technology sector). However, there is quite a bit of overlap with the S&P 500, so be careful with your diversification goals.
Russell 2000 performance vs. S&P 500 in 2026.
Then, using the remaining 20% equity exposure, investors can choose investments that help represent the themes they are most interested in. Some customers do this by selecting individual stocks. Another option is to look at ETFs that focus on specific themes or sectors, such as the State Street Select Sector SPDR, which breaks down the S&P 500 into industries such as financials, health care, and energy. Hickle said when buying thematic ETFs, which often include funds targeting AI and other technological innovations (space stocks being a recent example), investors should try to avoid too much overlap with the core portfolio.
“I’m never going to own just one sector ETF because I could be wrong,” said Neil Ellis, founding partner and co-chief investment officer at Fidelis Capital in Dallas.
Those desiring additional exposure to high flyers may also consider options that limit exposure to the downside while providing some upside. For example, the JPMorgan Hedge Equity Ladder Overlay ETF (Hello), T. Rowe Price Hedge Stock ETF (THEQ) and parametric hedged stock ETFs (PHEQ).
Consider tax effects
Investors looking for exposure to high flyers often forget that they are growth investments, not income-producing investments, and therefore generate meaningful capital gains, Sudit said. Short-term capital gains are taxed according to your ordinary income tax bracket. If you own an investment for one year, it will be taxed at long-term capital gains rates.
It’s important to consider taxes, as selling a popular technology stock or fund can result in a hefty tax bill, but it may still be a wise move if you’re taking on the risk.
Sudit had a client during the dot-com era who invested $5,000 in expensive dot-com stocks without consulting an advisor. He hoped the growth would provide him with the funds to buy a sports car within the next year. He got a 10x return, but the stock price had risen so much that he would have made a huge capital gain if he sold. He didn’t take the chips off the table, and the company fell into disrepair. In this case, the customer may lose the initial investment but still make a paper profit, but investors should be careful, as this may not be the case for everyone.
There may be options to recover tax losses. This involves selling securities at a loss to offset capital gains or reductions in taxable income, thereby reducing your tax liability. Even with the tax burden, investments that are too risky may be worth selling, Ulrich said. “You don’t want to hold on to something that you know won’t work out. If you’re concerned about the level of risk within your portfolio, whether it’s up or down, it doesn’t make sense to hold on to it to effectively take on more risk.”

