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Indicators a stock is part of a pump and dump scheme?
Pump-and-Dump strategy is happening everywhere. Less so in developed market. I can tell an experience from Emerging Market perspective. Usually several securities brokers work together to pump several "penny" stocks (5 - 7 stocks). They conspire together and searching for several investors, who have money and willing to participate in this scheme. These investors will then agree to invest (usually with Margin from securities) to start pumping the stocks. The stocks will be pumped until several Research Analysts take interest in it. Once the news were spread out regarding these highly speculative stocks. The investors gradually dumps the stocks (with help of their brokers). The things that you need to keep an eye for: - Low trading volume in the previous 3 - 6 months (relative to their peers) - Low P/E ratio with unremarkable earning growth - No positive catalyst or material news regarding the company - Stocks have high momentum (observe on weekly rather daily returns) Pump-and-dump usually last between 3 months to 6 months.