Single Stocks in Your Portfolio: Are They Worth the Time and Risk?

Investing in the stock market can feel both exciting and overwhelming. With so many options available, from passively managed index funds to picking your own individual stocks,  the question every investor eventually faces is: should I buy single stocks, or stick to mutual funds and ETFs?

The honest answer depends on you. Your goals, your time, your risk tolerance, and your tax planning needs all play a role. But understanding the mechanics behind individual stocks is critical before you commit real money. 

This guide walks you through exactly when single stocks in your portfolio make sense, and when they don’t.

Key Takeaways Individual stocks can offer lower fees and greater tax flexibility than many mutual funds or ETFs. Building a well-diversified stock portfolio typically requires owning 20–100 companies across different sectors. Holding too few stocks increases exposure to unsystematic risk, which is company-specific risk that diversification can reduce. Modern portfolio theory suggests that combining assets with low correlation can help lower overall portfolio risk. Individual stocks require more research, monitoring, and ongoing management than passively managed funds. Emotional discipline is essential, as investors may be tempted to panic-sell during downturns or chase popular stocks during rallies. If you cannot achieve adequate diversification or do not have the time to manage individual holdings, broad-market ETFs or mutual funds are often a better starting point. For most investors, index funds provide a strong core portfolio, while individual stocks can serve as a complementary growth allocation.

What Are Individual Stocks and Why Do Investors Consider Them?

When you buy individual stocks, you purchase ownership shares in a specific company. Unlike mutual funds or exchange-traded funds (ETFs) which pool money from many investors to hold a diversified basket of securities , single stocks give you direct, company-level exposure.

Many investors are drawn to individual stocks because they want to give exposure to sectors they like, express conviction in specific companies, or simply feel in control of their investments. According to research from Gallup, approximately 58% of Americans report owning stock in some form, with individual stock picking remaining a popular strategy among self-directed investors.

But owning individual stocks is not the best option when you want to invest in the stock market by default. It is worth the time and risk only when you have the tools, temperament, and portfolio size to do it responsibly.

Modern Portfolio Theory and Why Diversification Is Your Number One Concern

Before evaluating individual stocks, it helps to understand the foundational concept behind smart investing: modern portfolio theory (MPT). Developed by Nobel laureate Harry Markowitz, MPT is built on a simple but powerful insight, you can maximize your return without adding too much additional risk by combining assets that behave differently from each other.

The goal is to reach the point at which you can combine different investments to minimize risk for the entire portfolio while getting maximum returns. MPT recommends that you buy stocks that have a low correlation to each other, meaning when one stock is up, others are down. 

This is the engine behind diversifying your unsystematic risk, the risk related to one specific stock or company, such as a bad earnings report, executive scandal, or supply chain failure. Systematic risk (market-wide events like recessions) cannot be diversified away. But unsystematic risk absolutely can and should be managed through a thoughtfully built portfolio.

How Many Stocks Do You Need for Adequate Diversification?

Research suggests you need to own between 20 and 100 stocks to achieve adequate diversification. Holding fewer leaves exposes you to the risk of placing all your eggs in one basket. The exact number depends on how well-chosen your holdings are and whether they span different industries and geographies.

If you don’t have the funds to build such a portfolio, you are probably better off starting with a mutual fund or ETF. Once you can build up a solid base of stocks across sectors, then individual stock picking becomes a viable strategy.

 Individual Stocks vs. Mutual Funds / ETFs: At a Glance

Factor	Individual Stocks	Mutual Funds / ETFs
Diversification	Requires 20–100 stocks	Built-in across hundreds
Fees	One-time trading commission only	Annual management fee (0.03%–1%+)
Tax Control	Full control over timing of gains/losses	Fund decides when to distribute gains
Time Required	High — ongoing monitoring needed	Low — professionally managed
Transparency	Complete — you know every holding	Varies; disclosed periodically
Minimum Investment	Price of 1 share (or fractional)	Often $1,000+ for mutual funds
Emotional Risk	Higher — easy to react impulsively	Lower — removes stock-picking urge
Potential Returns	Higher upside (and downside)	Market-rate returns, lower volatility

The Pros of Holding Individual Stocks in Your Portfolio

The advantages of holding individual stocks become clear when we look at the key benefits they offer to investors 

1. Reduced Fees and Lower Cost of Ownership

One of the strongest arguments for individual stocks is cost. When you invest through a mutual fund, you pay a fund company annual management fee, even for passively managed index funds, fees typically range from 0.03% to over 1% annually. These fees have a big impact on your return when compounded over decades.

With individual stocks, you generally pay a fee when you buy the stock and one when you sell it. Beyond those transactional costs, there are no additional costs. Many brokerages now offer commission-free trading, which makes this advantage even more pronounced. Over a 30-year investment horizon, reduced fees can translate to tens of thousands of dollars in additional wealth.

2. Complete Tax Control

Another major advantage: you understand what you own and have complete control of what you are invested in,  including when to realize gains or losses. It is easier to manage the taxes on your individual stocks because you control the timing of taking your gains or losses.

With a mutual fund, the fund determines when to take the gains or losses, and you are assigned your portion of gains even if you bought into the fund at the end of the year. This can result in unexpected tax bills. Individual stock investors can use strategic harvesting, selling losing positions to offset gains,  with far greater precision.

3. Transparency and Customization

When you own individual stocks, you have low fees and manage your own tax situation alongside something equally valuable: you know exactly what you own. If you have ethical concerns about certain industries, you can exclude them. If you believe strongly in renewable energy or AI, you can overweight those sectors,a level of customization no fund can replicate.

The Cons of Holding Individual Stocks in Your Portfolio

While individual stocks can offer several benefits, they also come with important drawbacks that every investor should carefully consider.

1. It Is Harder to Achieve Adequate Diversification

The most significant drawback is that it is harder to achieve diversification with individual stocks. You are subjecting yourself to more risk due to the lack of diversity unless you own quite a few stocks, somewhere in that 20 to 100 range mentioned above.

For most retail investors, assembling and managing a diversified portfolio of 30+ stocks requires real capital. If you are starting with a small amount, you are more exposed to company-specific blow-ups that could wipe out your bet on any one position.

2. It Requires More Time and Active Monitoring

Individual stock investing requires more time from you to monitor your portfolio. You need to stay current on whether the companies you have invested in aren’t having business problems. This means reviewing earnings reports, staying updated on monitor industry and economic trends, and regularly reassessing your thesis for each holding.

Think of it this way: you become your own portfolio manager. If you cannot spend the time to ensure you’re not holding a bad position, a passively managed fund is a far more practical choice. Most financial advisors suggest reassessing individual stock positions at least quarterly.

3. Emotional Risk Is Higher

Perhaps the most underestimated risk of individual stock investing is the emotional one. It is easier to sell a loser or buy a hot-tip stock when you can instantly log in and make the trade in minutes. That convenience is a double-edged sword.

Emotional trading is one of the largest destroyers of long-term investment returns. Panic-selling during a downturn can lock in losses. Those losses that are entirely avoidable by holding something a bit longer. Similarly, chasing momentum stocks can increase your fees for trading while degrading your actual returns.

Keeping your emotions in check is a skill that takes years to develop. Self-directed investors who struggle with emotional discipline often perform worse than simple index fund holders.

Is This Strategy Right for You? Key Questions to Ask

Financial advisors David Rubin and Andrea Travillian of Smart Step and Chip Stapleton of Aspirify consistently highlight the same framework when evaluating the efficacy of holding single stocks in your portfolio. Ask yourself:

• Do I have the time to monitor 20+ companies on a regular basis?
• Do I have enough capital to build up a solid base of stocks across multiple sectors?
• Can I keep my emotions in check when markets get volatile?
• Do I have specific tax planning needs that make direct stock ownership advantageous?
• Am I comfortable being my own portfolio manager?

If you answered no to most of those, it is probably better to have adequate diversification through low-cost index funds or ETFs and revisit individual stock picking once your financial foundation is stronger. 

When Individual Stocks Actually Make Sense

There is a real case for single stocks in your portfolio,  but only under the right circumstances. According to research published by Vanguard, investors who supplement a diversified core portfolio with selective individual stock positions (sometimes called a ‘core-satellite‘ approach) can achieve competitive returns while containing risk.

• You are well positioned to invest in individual stocks when you:
• Already have a diversified core, a mutual fund, ETF, or target-date fund,  as your foundation.
• Have enough capital to diversify across 20+ carefully selected individual positions.
• Can devote meaningful time (several hours per month) to research and monitoring.
•  Have specific tax planning needs that make direct ownership more efficient.
• Want to give exposure to sectors you like that your existing funds underrepresent.

The key is to think of individual stocks as a complement to a solid foundation, not a replacement for it. Even seasoned professional fund managers rarely outperform broad index funds over a 15-year period, which is one reason many investors favor index investing.  

Conclusion

There is no universal answer to whether individual stocks belong in your portfolio. The efficacy of holding single stocks depends almost entirely on your personal circumstances,  the amount of time you have to dedicate to investing, your capital base, your tax situation, and your emotional discipline.

If your number one concern should be diversification and you are not yet in a position to achieve it with individual stocks, mutual funds and ETFs are the smarter starting point. As your portfolio grows, consider layering in individual positions strategically,focusing on sectors you understand, maintaining low correlation between holdings, and always keeping an eye on your total cost of ownership.

Done right, individual stocks can enhance your returns, reduce your tax burden, and give you a deeper connection to the companies you believe in. Done without adequate preparation, they can expose you to far more risk than most investors realize.

Related Article:

• Preferred Stock: Reliable Income for Investors