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10 Most Common Mistakes New Investors Make

Everyone makes mistakes when they start with stocks. But some mistakes are so common — and so costly — that it is worth knowing them in advance. Here are the 10 most common traps new investors fall into.
📅 28. April 2026 👁️ 17 views 📂 Grunnleggende 🇳🇴 Les på norsk

Learn from others mistakes — not just your own

"The wise learn from everyone — from their own mistakes and from others. The unwise learn only from their own — and pay full price every time."— Florence Scovel Shinn

Mistake 1 — Starting without a plan

The most common mistake. Buy impulsively — with no plan for when to sell, how much to invest or what your goal is.

Mistake 2 — Putting everything on one stock

Putting everything on one stock is gambling — not investing. Even the best companies can go bankrupt.

Mistake 3 — Trying to time the market

Statistic: Missing just the 10 best days in the S&P 500 cuts your returns almost in half over 20 years!

Mistake 4 — Following tips blindly

When a stock is hot on social media it has already risen a lot. You buy late and are left with the loss.

Mistake 5 — Ignoring costs

Brokerage and management fees seem small — but over time they eat a huge portion of your returns.

Mistake 6 — Selling in panic

The stock market has always recovered after crises. Those who held on did. Those who sold in panic did not.

Mistake 7 — Investing with borrowed money

Rule: Never invest money you cannot afford to lose. Pay off expensive debt before investing.

Mistake 8 — Checking prices too often

Daily price fluctuations are noise — not information. Check monthly, not daily.

Mistake 9 — Forgetting about tax

Use a share savings account (ASK) — then you defer the tax. Outside ASK always set aside 38% for tax.

Mistake 10 — Giving up after the first loss

Perspective: Peter Lynch said if you are right 6 out of 10 times you are an outstanding investor. Mistakes are part of the journey.

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Make all these mistakes in BørsArena — without losing real money! Learn what happens. Then invest real money with experience and wisdom.

"Mistakes are not the enemy of success — they are the path to it."— Florence Scovel Shinn

Ready to try it in practice?

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