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Common Stock Market Myths, Fact-Checked

Steven Levine, Founder of TickerPosts and OpenClassActions.com3 min read

A handful of stock-market "rules" get repeated so often they sound like common sense. Several are wrong, and a couple are the exact lines a promoter uses to push a bad trade. This is a plain-English fact-check of four of the most common ones.

Nothing here is investment advice. The point is to retire some bad mental shortcuts so a confident-sounding post has a harder time landing.

Myth: "A stock at a 52-week high is too expensive to buy"

Verdict: false. A share price, on its own, says nothing about whether a stock is expensive. A company at a fresh 52-week high might be fairly valued, overvalued, or still cheap relative to its earnings and growth — the price level alone does not tell you which. "It's at its high, so it must be expensive" confuses the share price with value. Whether a stock is expensive is a question about valuation (earnings, growth, the business), not about where the price sits in its yearly range.

Myth: "A penny stock is cheap, so it has more room to grow"

Verdict: false. A low price per share does not mean a company is cheap or has more upside. Value depends on the whole company (its market cap), not the price of one share, and a stock can issue more shares or do a split at any time. In practice, low-priced penny stocks tend to carry more risk, not more guaranteed upside: the SEC and FINRA flag them as more volatile and more prone to manipulation. "It's only a few cents, it could 10x" is one of the most common promotional hooks, and it does not follow from the price.

Myth: "If a lot of people online are buying it, it must be going up"

Verdict: false. Online activity is not a price predictor, and it is not even always real. The "everyone is buying this" feeling can be manufactured by a handful of coordinated accounts, which is the entire mechanism of a pump-and-dump. Even when the enthusiasm is genuine, a crowd of buyers today tells you nothing reliable about tomorrow. Treat a wave of online excitement as a reason to slow down and check, not as a signal to buy.

Myth: "A stock that dropped a lot is 'due' for a bounce"

Verdict: false. This is the gambler's fallacy applied to stocks. A stock that has fallen sharply is not "due" for anything; past price moves do not load the dice for future ones. A beaten-down stock can keep falling, recover, or go to zero, and which one happens depends on the business, not on how far it has already dropped. "It can't go any lower" is not a thesis.

The common thread

Each of these myths replaces actual research with a shortcut about the price or the crowd. The antidote is the same in every case: look at the company and the primary sources, not the share price or the noise around it. For how to do that, see How to Research a Stock Before You Buy, and for the promotional versions of these lines, see The Complete Guide to Spotting Stock Fraud and Pump Schemes.

Related reading

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