Human: What is a "pump and dump" stock scam? Assistant: 
A "pump and dump" stock scam is a stock scam in which the perpetrators acquire a large position in a stock, then artificially inflate the price of the stock by spreading false rumors about the company. The perpetrators then sell their shares at the inflated price, making a profit. The perpetrators then spread false rumors about the company, causing the stock price to fall, and the perpetrators buy back their shares at the lower price, making a profit again. The perpetrators repeat this process until the stock price falls to a