Three things to take away
- In the US, the SEC generally treats shares of small companies trading below $5 as penny stocks, many of which trade over the counter rather than on a major exchange.
- Thin trading and wide spreads mean you can lose money the moment you buy, and selling can be hard.
- Low prices and light disclosure make penny stocks a favourite target for pump-and-dump schemes.
How penny stocks work surprises many beginners, because the name suggests something cheap and harmless. A penny stock is a share in a small company that trades at a low price, and in the US the Securities and Exchange Commission generally uses the term for shares below $5. The low price is not the point. What sets these shares apart is where and how they trade, how little is known about many of the companies, and how easily their prices can be pushed around.
What counts as a penny stock
US rules define a penny stock as, broadly, a share of a small company trading at less than $5. Shares listed on a national securities exchange that meet its standards are generally excluded from the definition. In practice, the label is most often applied to shares traded over the counter (OTC), through dealer networks rather than on a major exchange.
Elsewhere, the phrase is used more loosely. In the UK, "penny shares" usually means shares priced below £1 or so, often on smaller growth markets. The details differ by country, but the risks are similar.
Where penny stocks trade
A company listed on a major exchange must meet standards on size, share price and financial reporting, and must keep meeting them. Many penny stocks do not. They trade on over-the-counter systems where a dealer quotes prices and where disclosure requirements can be much lighter, and in some cases minimal. Some companies are shells with little business at all.
That affects you directly: with less audited information, it is harder to know what the company owns, earns or owes, and easier for misleading claims to go unchallenged. Our stock market lesson explains how mainstream exchange listings work for comparison.
The spread problem: losing money on day one
Penny stocks are often thinly traded, meaning few shares change hands each day. Thin trading brings wide spreads. The figures below are illustrative.
A share is quoted at $0.38 to sell and $0.42 to buy. The spread is $0.04, which is 10% of the $0.40 midpoint. Buy 10,000 shares at $0.42 and you pay $4,200. Sell them straight back at $0.38 and you receive $3,800: a $400 loss, about 9.5%, before commission and without the price moving at all.
Selling can also be difficult. If you want to sell 10,000 shares and only a few thousand are bid, you may have to accept a lower price, or wait.
Dilution and reverse splits
Small companies often raise money by issuing new shares, which shrinks each existing shareholder's slice. As an illustration, if you own 1,000,000 shares of a company with 100 million in issue, you own 1% of it. If it issues another 50 million shares, your 1,000,000 are now 1,000,000 ÷ 150,000,000, about 0.67% of the company.
Companies whose price falls very low sometimes carry out a reverse split, merging shares to lift the price. In a 1-for-10 reverse split, 10,000 shares at $0.40 become 1,000 shares at $4.00. The value of the holding is unchanged at the moment of the split, but reverse splits often come at difficult times for a company.
Pump and dump
Low prices, light disclosure and thin trading make penny stocks easy to manipulate. In a pump and dump, promoters buy cheaply, then flood social media, chat groups, emails or paid newsletters with exciting claims: a breakthrough product, a takeover rumour, a "next big thing". New buyers push the price up, the promoters sell into that demand, and the price collapses, leaving late buyers with heavy losses. Identical schemes run with small crypto tokens, as the scam lesson explains.
Warning signs include unsolicited tips, claims of guaranteed or explosive gains, pressure to buy before a date, and a sudden surge in trading in a company that was previously quiet.
Why low prices attract beginners
A low share price feels affordable: $500 buys thousands of shares, and a move from $0.20 to $0.40 would double the money. But the price of one share says nothing about value on its own. A company's worth is the share price multiplied by the number of shares, and many penny stock companies have issued enormous numbers of them. A cheap share can still be an expensive company, or a company worth very little.
How to look at a penny stock critically
- Find the filings. Check whether the company files regular audited reports with its regulator. No filings means very little is known.
- Check where it trades and what disclosure that venue requires.
- Look at daily volume and the spread, and work out what you would lose buying and selling immediately.
- Count the shares in issue over time; steady increases mean ongoing dilution.
- Trace where the tip came from. If it reached you unsolicited, treat it as advertising at best.
- Size any holding as money you could lose completely.
Many brokers restrict OTC trading or add warnings and extra costs, which is itself a signal of the risk. The trading fees lesson covers commissions and spreads, and our platform checklist explains how to check the broker itself.
Quick answers
Is a $2 share always a penny stock?
Not necessarily. Under US rules, shares of companies listed on a national exchange that meet its standards are generally excluded, even at low prices. The label is mostly used for small companies trading over the counter.
Can penny stocks go up a lot?
Prices can rise sharply, which is what makes them attractive to promoters. They can fall just as sharply, and many companies fail. A large rise in the past says nothing about the future.
Why do brokers warn me before I trade penny stocks?
US rules require brokers to give customers specific risk information about penny stocks, and many brokers add their own restrictions because of the risks of thin trading and manipulation.
Sources
- US Securities and Exchange Commission, Exchange Act Rule 3a51-1 (definition of penny stock)
- US Securities and Exchange Commission, investor alerts on pump-and-dump schemes