Stock market scams: how to spot them before they find you

The Financial Conduct Authority received more than 57,000 reports of suspected investment fraud in 2023 alone. The total amount lost by UK investors to scams each year runs into hundreds of millions of pounds. If your first reaction to that figure is that it represents foolish people making foolish decisions with their money, that assumption is the first thing to correct. The people who lose money to stock market scams are not naive. They are experienced investors, business owners, retired professionals, people who read the financial pages and take their money seriously. The scams have evolved specifically to find those people.

The most common stock market scam, and arguably the oldest, is the pump and dump. The mechanics are simple enough. Someone acquires a large position in a small, illiquid stock for very little money, typically a micro-cap on AIM or a barely regulated overseas exchange. They then push out aggressively positive commentary about the company through whatever channel is most trusted at that moment. In the late 1990s it was email newsletters. In the 2000s it was spam. In the 2010s it was online bulletin boards. Today it is mostly WhatsApp groups, Telegram channels, and short-form video on TikTok and Instagram. The narrative is always the same shape: this company is about to do something extraordinary, and you need to get in before everyone else does.

The people running the scheme sell into the buying pressure they have created. By the time an ordinary investor notices the price moving and decides to act, the operators are already out. The stock collapses back to its starting level or lower. For the promoters, the exercise might have generated tens of thousands of pounds in a few days. For the investor who acted on the tip, there is nothing left but a position they cannot exit at anything close to what they paid.

Boiler room scams follow a different approach but lead to the same outcome. The term comes from the image of a room packed with people working phones, and that basic model has not changed much even as the technology around it has. Cold callers, often operating from offices in lower-regulation jurisdictions outside the UK, contact potential investors directly with an offer of shares in what is presented as a high-growth private company. The shares are either fictitious or wildly overpriced relative to what the operators originally paid for them. High-pressure tactics are standard. The pitch involves urgency and exclusivity. This is a one-time opportunity for a select group. There is a deadline. You need to decide now. None of that is true. What is true is that every pound you transfer is effectively gone.

The third major category is the investment scheme that presents itself as a legitimate managed fund or portfolio service. Ponzi schemes, named after Charles Ponzi, the fraudster who first made the technique infamous in the 1920s, pay early investors using the capital deposited by later investors rather than from any genuine returns. They need a constant flow of new money to survive. Bernard Madoff ran the largest Ponzi scheme ever uncovered, with approximately 65 billion dollars in client funds affected. His operation was only discovered when the 2008 financial crisis dried up the incoming capital he needed to keep paying existing clients. The victims included sophisticated institutional investors, major banks, and international charities. The lesson from Madoff is not that these schemes are obvious. It is that the appearance of legitimacy, a long track record, prominent clients, a regulated-looking structure, is not evidence of legitimacy.

Today the landscape has moved deep into social media. Influencer-led promotions of small stocks and cryptocurrencies operate on the same pump-and-dump logic as anything described in trading guides from 2010, but with far greater reach and a layer of personality that makes the recommendation feel personal rather than commercial. A creator with hundreds of thousands of followers talking enthusiastically about a coin or a stock they already hold is running a promotional exercise, whether or not they disclose the position. The FCA has been increasingly active in pursuing such cases, and several prosecutions have followed influencer-linked stock promotion schemes in the UK in recent years. The GameStop episode in 2021 illustrated how quickly coordinated buying can move a price and how quickly those who arrive late can be left with significant losses when the momentum reverses.

The most persistent misconception about investment fraud is that it succeeds because victims were greedy and should have known better. That framing lets the scammers off the hook and misrepresents how the most effective versions of these schemes actually work. Boiler room operators often spend weeks or months building a relationship with a target before asking for money. Fake managed funds produce credible documentation, professional-looking websites, and in some cases reference stolen or fictitious FCA registration numbers. Pump-and-dump promoters in social media communities build genuine trust over time before deploying it. The human impulse being exploited is not greed. It is the entirely reasonable desire to trust someone who appears to know more than you do. Greed might make you act quickly on a bad tip. Trust is what gets you in the door in the first place.

The practical defence begins with one habit. Whenever you are approached with an investment opportunity, by phone, email, social media, or a tip from someone you know, check the FCA Financial Services Register at register.fca.org.uk before taking any action. Any firm authorised to offer financial services in the UK must appear there. If the firm is not on the register, or if the details do not match what you have been told, walk away without further discussion. The FCA also maintains a ScamSmart warning list at fca.org.uk/scamsmart, which names firms and individuals flagged as operating without authorisation in the UK. It is updated regularly and takes about thirty seconds to check.

Beyond the register, the most useful principle is this: legitimate investment opportunities do not require you to decide today. Urgency is a sales tactic, not a feature of a sound investment. If someone is pressing you to commit quickly, treat that pressure as the reason to slow down entirely. The scams that catch the most people are the ones designed to make you feel as though you are taking decisive control of your financial future. In reality, you are being manoeuvred into position. Knowing that is most of the defence.

This article is for informational purposes only and does not constitute financial advice. The value of investments can go down as well as up, and you may get back less than you invest. Always do your own research before making any financial decisions.