These are also called investment schemes online. Criminals use these to try to manipulate securities prices on the market, for their personal profit. According to enforcement officials of the Securities and Exchange Commission, the 2 main methods used by these criminals are:
Pump-and-dump schemes
Main article: Pump and dump
False and/or fraudulent information is disseminated in chat rooms, forums, internet boards and via email (spamming), with the purpose of causing a dramatic price increase in thinly traded stocks or stocks of shell companies (the "pump"). As soon as the price reaches a certain level, criminals immediately sell off their holdings of those stocks (the "dump"), realizing substantial profits before the stock price falls back to its usual low level. Any buyers of the stock who are unaware of the fraud become victims once the price falls. When they realize the fraud, it is too late to sell. They lost a high percentage of their money. Even if the stock value does increase, the stocks may be hard to sell because of lack of interested buyers, leaving the shareholder with the shares for a far longer term than desired.
Short-selling or "scalping" schemes
This scheme takes a similar approach to the "pump-and-dump" scheme, by disseminating false or fraudulent information through chat rooms, forums, internet boards and via email (spamming), but this time with the purpose of causing dramatic price decreases in a specific company's stock. Once the stock reaches a certain low level, criminals buy the stock or options on the stock, and then reverse the false information or just wait for it to wear off with time or to be disproved by the company or the media. Once the stock goes back to its normal level, the criminal sells the stock or option at a profit.[citation needed]
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