Investing mistakes to avoid for teens

Teens 13–17 · Mistakes to avoid · Updated October 1, 2026 · LearnLife Editorial

Why do teens make investing mistakes?

Many teens make investing mistakes because investing involves new concepts about money and risk that take time to understand. Investing can seem exciting, confusing, or even overwhelming. For example, hearing about a friend’s success with a “hot” stock or a trending cryptocurrency can create pressure to jump in quickly, even without knowing the risks.

Teens might also feel the urge to make money fast or keep up with peers, which can lead to impulsive decisions. For instance, buying a stock right after it spikes in price or selling during a market drop out of fear are common mistakes. Another reason is not having a solid investing plan or enough knowledge about important basics like diversification, fees, and the value of time in investing.

Understanding these reasons helps you avoid similar pitfalls. Taking time to learn, asking questions, and investing patiently can set a foundation for smarter decisions.

What is a common mistake teens make by chasing quick gains?

Chasing quick gains means trying to make money fast by buying investments that are suddenly popular without proper research. Many teens want to jump on the latest trend, like a viral stock or cryptocurrency, hoping for quick profits.

For example, if you buy a stock just because it went up 20% last week, you might lose money when the price drops afterward. If you panic and sell at a loss, you lock in the loss instead of waiting for a possible recovery.

What to do instead:

• Avoid investing based solely on hype or “hot tips.”
• Research the company or investment to understand what makes it valuable.
• Choose diversified investments such as index funds, which spread your money across many companies.
• Focus on long-term goals and hold investments through market ups and downs.
• Remind yourself that building wealth usually takes time, not quick wins.

Why is ignoring fees and costs a problem for teen investors?

Many teens overlook fees, but even small costs reduce your investment growth over time. Fees can include trading commissions, fund expense ratios, account maintenance fees, or withdrawal fees. Over time, these fees subtract from your returns.

For example, if you invest $100 and pay a 2% annual fee, you lose $2 each year. This reduces the amount that can grow through compounding returns. Some investment apps offer commission-free trading, but funds might still have fees you don’t see at first.

What to do instead:

• Use apps that offer commission-free trades, popular among teen investors.
• Choose low-cost funds like index funds with expense ratios under 0.5%.
• Avoid frequent buying and selling, which can trigger fees and taxes.
• Read your account statements carefully to understand all fees.
• Ask questions if you’re unsure about charges.

How does not having a clear investing plan cause mistakes?

Investing without a plan is risky because it makes it easier to make impulsive or emotional decisions. Without goals, you might put all your money into one stock or switch investments too often, which increases risk and can reduce returns.

For example, if you invest your entire savings in one tech stock and it drops suddenly, you could lose a significant portion of your money. A plan helps you decide how much to invest, which investments to choose, and how long to keep them.

How to create a simple investing plan:

1. Define your financial goals (like saving for college, a car, or just learning investing).
2. Decide how much money you can invest regularly, even a small amount like $20 per month.
3. Choose investments that match your risk tolerance and timeline.
4. Diversify by spreading your money across different stocks or funds.
5. Set rules to avoid emotional decisions (e.g., “I won’t sell during a market dip unless my plan says so”).
6. Review and adjust your plan at least once a year.

Having a plan helps you make consistent decisions and avoid common mistakes.

What are the dangers of neglecting research before investing?

Not researching investments means you might put money into companies or funds that don’t fit your goals or have financial problems, leading to losses.

For example, buying stock in a company because you like its product but without checking how it earns money or whether it is financially stable could result in losing money if the company performs poorly.

How to research investments:

• Use trusted websites or apps that explain companies and funds in clear language.
• Read recent news, but be wary of hype or rumors.
• Look at financial basics: Is the company profitable? Does it have a lot of debt? Is it growing steadily?
• Learn about investment products through beginner guides like Investing 101 for teens and young adults.
• Ask a parent, guardian, or trusted adult to help review your research.

Research helps you make informed decisions and increases your chances of success.

Why is emotional investing a mistake, and how can teens avoid it?

Emotional investing means making decisions based on feelings like fear, excitement, or peer pressure rather than facts. This often leads to buying high during market excitement or selling low during fear.

For example, if you see a stock price falling, you might panic and sell to avoid further loss, even though the price might recover later. Or you might buy a stock just because everyone else is excited about it without understanding the risks.

How to avoid emotional investing:

• Stick to your investing plan, no matter market ups and downs.
• Set clear rules such as, “I will only sell if my plan says so.”
• Limit how often you check your investments to reduce emotional reactions.
• Remind yourself markets fluctuate normally.
• Only invest money you don’t need in the short term.
• Talk with a trusted adult if you feel unsure or stressed.

Learning to control emotions is key to long-term investing success.

What costs come from not starting early or saving regularly?

Starting to invest early gives your money more time to grow through compounding, which means you earn returns on your returns. Delaying investing or saving only occasionally means missing this advantage.

For example, if you start investing $50 each month at age 15, your money has more years to grow than if you wait until age 20 to start the same habit. The difference in growth can be significant over time.

How to build good investing habits:

• Begin investing as soon as you can, even with small amounts.
• Set up automatic monthly transfers to your investment account, making investing consistent.
• Treat investing like paying a monthly bill to stay on track.
• Track your investment growth to stay motivated.
• Adjust the amount you invest as your income or savings increase.

Consistent investing habits help avoid mistakes like procrastination and help build wealth steadily.

How can teens recover from investing mistakes?

Mistakes are normal when learning to invest. If you lose money or make a poor decision, don’t give up. Instead, use the experience to improve your approach.

Steps to recover:

1. Identify what went wrong—was it emotional selling, poor research, or ignoring fees?
2. Learn from the mistake by reading reliable guides or talking to adults.
3. Adjust your strategy to be more diversified or less risky.
4. Sell investments that don’t fit your goals or have weak prospects.
5. Keep investing regularly to rebuild and grow your portfolio.
6. Maintain good habits like following your plan and doing research.

Mistakes become stepping stones when you stay calm and committed to learning.

What habits help teens avoid investing mistakes?

Developing strong habits helps prevent common investing errors.

• Set clear, realistic goals for your investments.
• Do research before investing and verify information.
• Diversify your investments to spread risk.
• Avoid chasing trendy or “hot” investments without understanding them.
• Invest regularly, even small amounts.
• Keep emotions out of financial decisions.
• Review your plan at least once a year and adjust as needed.
• Seek advice from trusted adults or reliable resources.

These habits build confidence and help you invest wisely over time.

Where can teens learn more about investing safely?

Investing is a skill you improve with learning. Trusted resources like the U.S. Securities and Exchange Commission’s guides on Investing tips and tricks for teens and Investing questions to ask for teens explain key concepts in accessible ways. Also, Investing rules and regulations for teens helps understand legal basics.

Talking with parents, guardians, or educators about investing can provide helpful guidance. The more you learn, the better your investment decisions.

Frequently asked questions

Can teens invest in cryptocurrencies safely?

Cryptocurrencies are highly volatile and risky. Teens should approach them cautiously and only invest money they can afford to lose. It’s better to start with traditional investments like stocks or funds and learn the basics first.

What is a custodial account, and do teens need one?

Teens under 18 usually need a parent or guardian to open a custodial account to invest. The adult manages the account until the teen reaches adulthood. This lets teens learn investing while following legal rules.

How can I avoid emotional investing when markets drop?

Having a clear plan helps. Remind yourself that market dips are normal. Avoid checking your investments too frequently, and talk to a trusted adult if you feel stressed. Focus on long-term goals rather than short-term changes.

Should teens invest money they might need soon?

It’s best not to invest money you’ll need in the near future because investments can lose value temporarily. Keep short-term savings in safe accounts and invest funds you can leave invested for several years.

How often should teens review their investing plan?

Reviewing your investing plan once a year is a good habit. This helps you track progress, adjust goals, and change your investments if your situation or goals change.