Investors often feel as though the market has a personal grudge against them.

You finally decide to buy a stock, and it crashes the next day. Or you sell an investment you have held for years, only to watch it skyrocket a week later.

That experience leads to a common question: Is today a bad time to invest when the market is already this high?

Consider an extreme scenario. Imagine having the worst timing possible and investing in the S&P 500 on the exact day the market peaked before a major crash. Then, instead of selling, you simply held the investment.

From its October 2007 peak to its March 2009 trough, the S&P 500 fell approximately 57%.

That would have been painful. But over a sufficiently long holding period, even an investment made at an extraordinarily bad entry point eventually participated in the subsequent market recovery.

The lesson is important: finding the perfect time to invest may not be the hardest part of investing. Staying invested can be much harder.

That is one reason exchange-traded funds, or ETFs, can work well for long-term investors. The fund handles the underlying portfolio according to its stated methodology, reducing the need for the investor to continually decide which individual stocks to buy and sell.

But not every ETF should be treated the same way.

Some funds can potentially serve as long-term core holdings. Others concentrate on cyclical industries or emerging technologies and can experience much larger price swings.

The five ETFs examined here represent different parts of that spectrum:

• Vanguard S&P 500 ETF (VOO)
• Roundhill Memory ETF (DRAM)
• VanEck Semiconductor ETF (SMH)
• Tema Space Innovators ETF (NASA)
• Defiance Quantum ETF (QTUM)

The goal is not simply to find five ETFs with attractive growth potential. It is to identify funds that can play different roles without unknowingly turning the portfolio into five versions of the same investment.

The Five ETFs at a Glance

1. Vanguard S&P 500 ETF (VOO): The Portfolio Foundation

The Vanguard S&P 500 ETF (VOO) seeks to track the S&P 500 Index, providing exposure to roughly 500 of the largest U.S. companies. Vanguard currently reports 505 holdings and an expense ratio of just 0.03%.

Those companies are not held equally.

VOO is market-cap weighted, meaning larger companies receive substantially larger allocations than smaller companies. As a company’s market capitalization grows relative to other index members, its weight can rise. If it becomes a smaller part of the index, its weight can decline.

Investors therefore do not have to continually decide which large U.S. companies deserve larger or smaller positions.

That makes VOO particularly useful as a core portfolio holding.

Rather than being the most aggressive investment in the portfolio, its role is to provide a broad foundation that can make it easier to tolerate more concentrated growth investments elsewhere.

Recent 10-year performance for Vanguard’s S&P 500 index strategy has been roughly 15% annualized, depending on the exact measurement date and share class.

Why Hold VOO in a Taxable Brokerage Account?

For a long-term investor who expects to leave VOO largely untouched, a regular taxable brokerage account can provide flexibility.

That can be particularly relevant for someone pursuing early retirement. IRAs generally impose rules and potential penalties on withdrawals before age 59½, although exceptions and strategies—including substantially equal periodic payments under Section 72(t)—may apply.

A taxable brokerage account provides easier access to invested assets, although selling appreciated shares can create capital-gains taxes.

2. Roundhill Memory ETF (DRAM): A Concentrated Bet on AI Memory Demand

At the opposite end of the risk spectrum is the Roundhill Memory ETF (DRAM).

DRAM launched on April 2, 2026 and charges a 0.65% expense ratio. Roundhill designed the fund to provide targeted global exposure to companies involved in high-bandwidth memory, DRAM, NAND and related memory technologies.

Roundhill currently highlights companies including Micron, Samsung, SK Hynix, SanDisk and Kioxia among the fund’s major exposures.

That is very different from owning hundreds of companies through an S&P 500 ETF.

Why Memory Chips Matter to the AI Boom

Artificial intelligence infrastructure requires much more than processors.

Advanced AI accelerators require high-performance memory operating alongside them, and technologies such as HBM have become an important part of the AI computing supply chain.

The investment thesis behind DRAM is that memory demand could continue expanding as AI workloads become more data-intensive.

DRAM also provides global exposure to major Asian memory manufacturers that may not receive meaningful weights in a conventional U.S. large-cap index fund.

Memory Is a Cyclical Business

Semiconductor memory has historically been cyclical.

Demand can rise faster than supply, pushing pricing and profitability higher. Manufacturers can then increase capacity, supply catches up, and pricing can weaken.

Roundhill itself warns that memory companies are exposed to business cycles, pricing volatility, supply-chain disruptions, competition, rapid technological change and export-control risk.

Under the strategy described here, DRAM is therefore treated as a smaller tactical growth position rather than an automatic decades-long core holding.

3. VanEck Semiconductor ETF (SMH): A High-Conviction Semiconductor Growth Fund

The VanEck Semiconductor ETF (SMH) is the primary high-growth holding in this five-fund strategy.

SMH currently holds 26 positions, including cash, and charges a 0.35% expense ratio. The fund seeks to track the MVIS U.S. Listed Semiconductor 25 Index, which focuses on large and liquid companies involved in semiconductor production and equipment.

Current major holdings include companies such as:

• NVIDIA
• Taiwan Semiconductor Manufacturing
• Broadcom
• Micron
• AMD
• ASML

Unlike a broad technology ETF, SMH focuses specifically on the semiconductor ecosystem. It does not attempt to provide broad exposure to software, financial companies, healthcare, consumer staples or the rest of the economy.

That concentration creates both its appeal and its risk.

How SMH Handles Its Largest Holdings

SMH’s index methodology favors large, liquid semiconductor companies while applying weighting constraints during index construction and rebalancing.

That matters because a major semiconductor winner can become a very large part of a sector fund. Current portfolio data, for example, puts NVIDIA at more than one-fifth of SMH.

The Return Potential—and the Pain

SMH’s historical returns have been dramatic. VanEck reported a roughly 35.7% annualized 10-year NAV return for the period ending April 30, 2026.

But those returns came with significantly greater volatility than a diversified S&P 500 fund.

Semiconductor stocks can experience severe drawdowns when demand slows, inventories rise, valuations compress, capital spending changes or geopolitical risks intensify.

Under this particular strategy, SMH is treated as a long-term holding alongside VOO rather than a short-term semiconductor trade.

4. Tema Space Innovators ETF (NASA): Exposure Beyond the Usual Tech Portfolio

The Tema Space Innovators ETF (NASA) is fundamentally different from the other growth funds on this list.

NASA launched on March 30, 2026, currently reports 37 holdings, and charges a 0.75% expense ratio.

The actively managed ETF invests across the commercial space economy and can include both publicly listed businesses and a limited number of high-conviction pre-IPO companies.

Its portfolio can include businesses involved in:

• Launch services
• Satellites
• Satellite communications
• Space infrastructure
• Radio-frequency technology
• Commercial space services

Current issuer data shows SpaceX as the fund’s largest position and Rocket Lab as another major holding.

Its primary appeal within this five-ETF portfolio is different economic exposure.

Most of the other growth investments have substantial direct or indirect semiconductor exposure. NASA adds an industry that many conventional portfolios barely touch.

The Risk Is Substantial

The diversification benefit should not be confused with safety.

Commercial space remains an emerging industry. Many businesses require large amounts of capital, face execution and launch risks, rely on government or enterprise contracts, and may have limited or inconsistent profitability.

The ETF’s short operating history also means investors do not yet have a long fund-level performance record across multiple market cycles.

That explains why NASA receives only a small allocation in the sample portfolio.

5. Defiance Quantum ETF (QTUM): Diversifying the Quantum Bet

The final fund is the Defiance Quantum ETF (QTUM).

QTUM currently holds 89 companies and charges a 0.40% expense ratio. Its underlying index covers companies connected to quantum computing and machine learning, including quantum hardware, chips, superconducting materials, artificial intelligence and big-data technologies.

Individual holdings are generally much smaller than the largest positions found in SMH or DRAM.

That construction creates an interesting tradeoff.

No single company currently dominates the fund to the degree NVIDIA dominates SMH. But that also means a breakout winner has less ability to transform the entire portfolio by itself.

That can be useful in quantum computing because it remains uncertain which companies—or which technical approaches—will ultimately become dominant.

QTUM Isn’t Purely a Quantum-Computing ETF

One of the most important details is that QTUM should not be interpreted as a portfolio consisting exclusively of pure-play quantum-computing companies.

The BlueStar Machine Learning and Quantum Computing Index also includes businesses involved with machine learning, artificial intelligence, chips, data infrastructure and related technologies.

The portfolio also includes international securities, adding geographic exposure that a U.S.-only technology portfolio might not otherwise contain.

Given the technological uncertainty surrounding quantum computing, QTUM is another fund assigned a small position in the strategy.

ETF Overlap Matters More Than the Number of Funds You Own

Owning five ETFs does not automatically mean you have five independent investments.

ETF overlap is one of the most important issues in this strategy.

Several of these funds can hold the same semiconductor and technology companies. The question is therefore not simply whether two ETFs share a stock.

You also need to examine how much each ETF allocates to that stock.

That distinction is essential when evaluating whether another ETF genuinely adds diversification.

Why QQQ and QQQM Didn’t Make the List

The absence of the Invesco QQQ ETF (QQQ) or its lower-cost Nasdaq-100 counterpart QQQM may seem surprising in a high-growth portfolio.

Their exclusion is not based on poor historical performance.

The issue in this portfolio is duplication.

Current ETF Research Center data shows approximately:

• 53% overlap by weight between QQQ and VOO
• 38% overlap by weight between QQQ and SMH

Those figures are higher than the overlap measurements cited in the original transcript because ETF weights have changed.

VOO and SMH already form the backbone of this particular portfolio. Adding another large Nasdaq-100 allocation would therefore increase exposure to many companies already held elsewhere.

That question is more useful than simply asking whether an ETF has historically performed well.

Look Through the ETF and Find Your True Stock Exposure

Overlap becomes even more important when individual companies are examined.

NVIDIA, Micron and other semiconductor companies can appear across multiple funds in this portfolio.

An investor may therefore build a substantial company-level position without ever intentionally purchasing that company’s stock.

For example, an investor who owns VOO, SMH, DRAM and QTUM could receive Micron exposure through several different vehicles simultaneously.

Likewise, NVIDIA exposure can come from VOO, SMH and other technology-oriented funds.

The lesson is critical:

Your actual exposure is determined by the holdings inside your funds, not simply by the number of ETF names listed in your brokerage account.

How the Five ETFs Could Fit Together

The allocation described in the underlying strategy uses a simple $100 portfolio example:

The underlying structure, however, is noteworthy.

A full 80% of the example portfolio goes into VOO and SMH, the two investments intended to remain largely untouched.

The remaining 20% is divided among the three more specialized positions.

That creates a structural distinction between long-term holdings and themes that may require more active reassessment.

Expense Ratios and Track Records Should Influence Position Size

Another pattern emerges when comparing the five ETFs.

VOO has the lowest expense ratio in the group at 0.03%, while the younger thematic funds charge considerably more:

• VOO: 0.03%
• SMH: 0.35%
• QTUM: 0.40%
• DRAM: 0.65%
• NASA: 0.75%

Expense ratios are deducted from fund returns automatically. They therefore represent a persistent cost regardless of whether the ETF rises or falls.

The newer thematic ETFs also have shorter track records.

DRAM launched in April 2026, and NASA launched in March 2026. Their strategies may ultimately perform well, but investors do not yet have years of real-world fund behavior across multiple market environments.

Why Put Tactical Holdings in an IRA?

Under this strategy, VOO and SMH are treated as long-term taxable holdings, while DRAM, QTUM and NASA are treated as positions that may need to be adjusted as industries, valuations and investment theses evolve.

Buying and selling securities inside a traditional or Roth IRA generally does not create a current taxable capital-gains event each time the investment is changed.

That can make reallocation simpler from a current-tax perspective.

The Bigger Lesson: Don’t Buy ETFs by Their Names

The most important lesson from this five-ETF strategy is not necessarily that every investor should own these exact funds.

It is that ETF selection should happen at the holdings level.

Before buying a new fund, open its portfolio and examine what is actually inside.

Ask:

1. What companies does this ETF actually own?
2. How concentrated are the largest positions?
3. How much overlap exists with funds I already own?
4. What is my true company-level exposure after combining all ETFs?
5. What does the fund charge every year?
6. How long has the ETF existed?
7. What would make me sell or reduce the position?
8. Could I realistically hold it through a severe drawdown?

Five ETF names on a brokerage statement can look diversified while quietly concentrating a large percentage of your money in the same handful of stocks.

For this particular strategy, the portfolio is deliberately divided between two larger long-term holdings and three smaller thematic positions.

The core provides the structure. The smaller positions provide targeted exposure to memory chips, quantum-related technologies and commercial space.

That approach also addresses one of investing’s hardest challenges: not predicting exactly when the market will rise or fall, but constructing a portfolio you can realistically continue holding when volatility arrives.