I've made almost every mistake on this list. That's why I'm writing it — so you don't have to learn these lessons the expensive way. Here are the 10 biggest mistakes teen investors make, and how to dodge them.
1-3: The Emotional Mistakes
1. FOMO Trading
Your friend made 300% on a random stock/crypto. You throw money at it. By the time you buy, the hype is over and it crashes. Sound familiar?
Fix: If you're hearing about it from friends or TikTok, you're probably late. Stick to your investment plan.
2. Panic Selling
The market drops 15%. Headlines scream. You sell everything. Two months later, the market recovers and you missed the rebound. Every single market crash in history has been followed by a recovery.
Fix: Remember your time horizon. You have DECADES. A 15% drop is a speed bump, not a cliff.
3. Checking Your Portfolio Too Often
Looking at your portfolio 5 times a day creates anxiety and tempts you to make impulsive trades. Studies show investors who check less frequently get BETTER returns.
Fix: Check once a week max. Once a month is even better.
4-6: The Strategy Mistakes
4. Not Diversifying
Putting all your money in one stock is gambling, not investing. Even if you love Tesla, don't put 100% there.
Fix: Use ETFs for your core portfolio. Individual stocks should be the \"explore\" part — max 20%.
5. Trying to Time the Market
\"I'll wait for the crash to buy.\" Meanwhile, the market goes up 20% and you miss it entirely. Time IN the market beats timing the market.
Fix: Use dollar-cost averaging. Invest regularly regardless of what the market is doing.
6. Ignoring Fees
Some platforms charge $5 per trade or 1-2% annual management fees. On small amounts, these eat your returns alive.
Fix: Use low-cost platforms and ETFs with expense ratios under 0.20%. Check our platform guide.
7-10: The Knowledge Mistakes
7. Investing Money You'll Need Soon
Investing your concert ticket money or next month's car payment is a terrible idea. If the market dips right when you need the cash, you're stuck selling at a loss.
Fix: Only invest money you won't need for 5+ years. Keep short-term money in savings.
8. Following \"Gurus\" Blindly
That YouTuber with 500K subs doesn't know the future. Nobody does.
Fix: Learn the fundamentals yourself (that's what our modules are for) and make your own informed decisions.
9. Ignoring Taxes
Selling stocks after 11 months means short-term capital gains tax (higher rate). Waiting one more month could save you hundreds.
Fix: Hold for at least 1 year when possible.
10. Not Starting at All
The biggest mistake is waiting. Every day you don't invest is a day of compound interest you'll never get back.
Fix: Start with $5 today. Right now. The amount doesn't matter — the habit does.