Explainer · Risk, Costs & Protection
Investment scams: pump and dump and other red flags
A pump and dump scam turns other people's excitement into the fraudster's exit. The hype is the product, and the people who buy last are the ones who pay for it.
Quick answer
In a pump and dump, fraudsters spread false or misleading information to create a buying frenzy that pushes a stock's price up, then sell their own shares at the inflated price [1]. When they stop promoting, the price typically falls and investors lose money [1].
Key points
- Pump and dump schemes use false or misleading hype to lift a price so insiders can sell [1].
- Microcap stocks are especially vulnerable because little public information exists about many of them [1].
- FINRA says the selling and crash often happen very rapidly, sometimes in seconds [2].
- Group chats, social media and impersonated experts are common channels in recent SEC warnings [4].
- Promises of guaranteed returns are a red flag, because every investment carries some risk [3].
On this page
What is a pump and dump scam?#
The SEC's investor site describes the scheme in one sentence: fraudsters spread false or misleading information to create a buying frenzy that will pump up the price of a stock, and then dump their own shares by selling at the inflated price [1]. Once they have sold and stopped promoting, the stock price typically falls and investors lose money [1].
FINRA breaks these schemes into three core elements: the setup, the pump and the dump [2]. In the setup, fraudsters quietly buy up a large part of the shares available to trade, which makes the price easier to manipulate [2]. The pump draws the attention of other investors, who may buy the stock and drive the price even higher [2]. That rising price looks like proof the story is true, which is exactly what the promoters need.
Why are microcap stocks the usual target?#
Because it is hard to check the story. Investor.gov says microcap companies are particularly vulnerable to pump and dump schemes because there is often limited publicly available information about them [1]. FINRA says it has historically seen fraudsters target low-priced microcap stocks trading on over-the-counter (OTC) markets [2].
A larger company that files regular reports gives you something to compare a claim against. You can read its annual and quarterly reports, as our guide to SEC filings explains. When a pitch praises a company whose current financial information you cannot find from independent sources, Investor.gov says to be especially careful [3].
Where do pump and dump pitches show up?#
Almost anywhere people talk about money. Investor.gov lists social media, investment research websites, newsletters, online ads, email, chat rooms, direct mail, newspapers, magazines and radio [1]. A December 2025 SEC investor alert adds investment group chats, including on commonly used social media platforms [4]. FINRA adds that operators increasingly use texts and encrypted messaging apps [2].
That alert describes a pattern worth knowing. The person leading the chat may be a well-known figure who is being impersonated, sometimes with AI deepfake videos [4]. Fraudsters sometimes use group chats to run pump and dump schemes, making false and misleading statements to create a buying frenzy and then selling at investors' expense [4].
The table pairs each channel with an example pitch and the matching warning from the SEC sources cited on this page.
| Where it appears | What the pitch can look like | What the SEC says to watch |
|---|---|---|
| Group chats and messaging apps | A famous name promotes an AI stock-pick tool | Leaders may be impersonated, even with deepfakes |
| Social media and online ads | Posts praising a little-known company | Claims you cannot confirm from independent sources |
| Email, newsletters, direct mail | An unsolicited tip about a little-known stock | Unsolicited pitches are a reason for extra care |
Channels and warnings from Investor.gov [1] [3] [4]; messaging apps from FINRA [2].
How much can a late buyer lose?#
Everything gained on paper in the pump can disappear in the dump. FINRA notes that the selling and the resulting share price crash often occur very rapidly, sometimes in a matter of seconds [2]. A late buyer may not get a chance to sell near the price they paid.
- Price rise during the pump
- +700%$0.50 to $4.00, calculated
- Amount paid
- $4,0001,000 shares x $4.00, calculated
- Value after the dump
- $4001,000 shares x $0.40, calculated
- Loss
- -90%$3,600 of $4,000, calculated
A sudden jump in trading activity is not proof of fraud on its own. Our guide to volume and average volume shows how to read those numbers, and our explainer on stock market risk covers why small, thinly traded stocks can swing so far.
What are the red flags of investment fraud?#
Investor.gov lists warning signs that apply to pump and dumps and to most other scams [3]. If it sounds too good to be true, it is [3]. Guaranteed returns are a red flag because every investment carries some degree of risk [3]. The SEC's group chat alert puts it more bluntly: fraudsters often promise high guaranteed investment returns, but there is no such thing [4].
Watch the pressure as well as the promise. Scam artists often say an offer is once in a lifetime and will be gone tomorrow [3]. Pitches may stress that everyone is investing, so you should too [3]. A likeable, trustworthy manner can create a halo effect that blinds investors [3], and free seminars or lunches can be used to make you feel you owe a favor [3]. In group chat scams, a demand for a fee, tax or deposit before you can withdraw your profits is another warning sign [4].
How can you check a stock tip before you act?#
- Check who is pitching
Find out whether the salesperson who contacted you is licensed to sell securities in your state, and look up brokers on BrokerCheck and advisers on IAPD [3].
- Confirm it is not an imposter
Contact the professional through the phone number or website in the firm's Form CRS, not the one in the chat [4].
- Do not rely on the chat
The SEC says investors should never rely solely on information from group chats in making investment decisions [4].
- Report it
If something looks like fraud, report possible securities fraud to the SEC [4].
Mistakes beginners make with hot stock tips#
- Treating a rising price as proof
In a pump, new buyers push the price higher, which makes the hype look right until the dump [2].
- Trusting a famous name in a chat
Chat leaders can be impersonated, sometimes with deepfake videos [4].
- Buying because everyone else is
Investor.gov lists "everyone is investing in this" as a red flag, not a reason to buy [3].
- Paying a fee to get your profits out
A demand for a fee, tax or deposit before you can withdraw is a sign of a scam [4].
- Skipping the background check
Investor.gov tells you to check a broker on BrokerCheck and an adviser on IAPD before you invest [3]. Open a brokerage account at a firm you looked up yourself, not through a link someone sent you in a chat.
Frequently asked questions#
Is a pump and dump illegal?
Why do pump and dumps often involve tiny companies?
Can I sell in time if I spot the dump?
Do not count on it. FINRA says the selling and price crash often happen very rapidly, sometimes in a matter of seconds [2].
The bottom line#
A pump and dump runs on hype, speed and the hope that you will not check. Be wary of tiny stocks with little public information, pitches that promise guaranteed returns or push you to act now, and chat leaders you cannot verify. Check the seller, look for real filings, and report what looks like fraud. Before you buy anything, read our risk disclosure and our guide to stock market risk.
Sources
Education only. This page is not investment, tax or legal advice. Stocks can lose value. See our risk disclosure.
