Bad investing advice circulates faster than good advice because it sounds exciting. “Double your money in six months” gets clicks. “Buy boring index funds and wait 30 years” gets ignored. Here are five investing myths that sound reasonable but consistently cost people real money.
Myth 1: You need to time the market to succeed
The idea that you should wait for a dip, buy low, sell high, and repeat sounds logical. In practice, nobody does this consistently. Not hedge fund managers, not Wall Street analysts, not anyone.
A study by Charles Schwab looked at five investing strategies over 20-year periods: perfect market timing (impossible to replicate, but as a benchmark), investing immediately, dollar-cost averaging, bad timing (investing at the worst possible moment each year), and staying in cash. The results? Even the investor with the worst timing every single year beat the one who stayed in cash. And perfect timing barely outperformed investing immediately.
The reason: markets trend upward over long periods. Every day you sit in cash waiting for a “better entry point” is a day your money isn’t growing. Missing just the 10 best trading days over a 20-year period can cut your total return in half. Those best days are nearly impossible to predict and often occur right after the worst days.
The lesson: invest regularly regardless of what the market is doing. Time in the market beats timing the market.
Myth 2: Renting is throwing money away
This isn’t strictly an investing myth, but it affects investment decisions because people pour money into homeownership assuming it’s always a better financial move than renting and investing the difference.
Homeownership has costs that are invisible until you’re writing the checks: property taxes (1% to 3% of home value annually), insurance, maintenance (budget 1% to 2% of home value per year), closing costs (2% to 5% of purchase price), and mortgage interest (which is mostly what you pay in the first several years of the loan). None of that builds equity.
If you rent for $1,500/month and the equivalent house costs $2,300/month in mortgage, taxes, insurance, and maintenance, investing that $800 monthly difference in an index fund can produce comparable or better long-term wealth than homeownership, depending on the local housing market, how long you stay, and how disciplined you are about investing the savings.
Owning a home is fine. Owning a home because you believe renting is “wasting money” without running the actual numbers is a mistake.
Myth 3: You should sell when the market drops
Every market crash triggers a wave of panic selling. People see their portfolios drop 20% to 30% and sell to “stop the bleeding.” The problem is that by the time you sell during a crash, you’ve already absorbed the loss. Selling just locks it in permanently.
The S&P 500 has recovered from every single crash in its history. The 2008 financial crisis saw a drop of roughly 50%. Within five years, the index had fully recovered and was hitting new highs. The March 2020 COVID crash dropped the market about 34%. It recovered in under six months.
Selling during a crash and buying back later requires you to be right twice: when to sell and when to buy back in. Almost nobody gets both calls right. Most people sell near the bottom and buy back after the recovery is well underway, capturing the loss and missing the rebound.
If your investment timeline is 10 or more years away, a crash is a buying opportunity, not a reason to exit. Keep investing through downturns. Your future self will thank you.
Myth 4: Higher risk always means higher returns
Risk and return are correlated, but not linearly. Taking on more risk increases the range of possible outcomes. It doesn’t guarantee higher returns. It just means both the upside and the downside get wider.
Penny stocks are high risk. Most lose money. Cryptocurrency is high risk. Some coins have gone to zero. Leveraged ETFs are high risk. Over time, they can decline even when the underlying index rises, due to the math of daily rebalancing.
The risk that gets rewarded over time is market risk, meaning the risk of owning a diversified portfolio of stocks through ups and downs. That’s why index funds work. You’re accepting the market’s volatility in exchange for the market’s long-term growth.
Concentrated risk, putting 50% of your portfolio into one stock or one sector, is a gamble, not an investment strategy. You might win big. You might also watch half your portfolio evaporate.
Myth 5: You need a financial advisor to invest
Financial advisors can be helpful for complex situations: estate planning, tax optimization, business owners, high net worth individuals with multiple account types. For someone starting out with $100 to $500 per month, a financial advisor is usually unnecessary and can be expensive.
Many advisors charge 1% of assets under management annually. On a $100,000 portfolio, that’s $1,000 per year. Over 30 years, that 1% fee compounds into roughly 25% to 30% less wealth compared to managing your own portfolio with low-cost index funds.
If your investment plan is “buy index funds, invest regularly, don’t sell during crashes, rebalance once a year,” you don’t need someone charging 1% annually to execute that. You can set it up in an afternoon.
If you do want guidance, robo-advisors like Betterment and Wealthfront charge 0.25% and automate the same process. That’s a quarter of the cost of a human advisor for a service that handles rebalancing, tax loss harvesting, and allocation automatically.
What actually works
Boring investing beats exciting investing almost every time. Buy diversified index funds. Invest consistently. Don’t try to predict the market. Don’t panic sell. Keep fees low. These five things account for most of the difference between investors who build wealth and those who don’t. No myths required.