A bear raid is a coordinated effort by a group of investors to short sell many shares of a company. When combined with a campaign of planted negative stories (such as rumors of financial difficulties), the intent is to trigger a major sell-off that drives down the price of a company’s stock, allowing the original group of short sellers to reap significant profits. A coordinated short selling campaign of this type is considered by the Securities and Exchange Commission to be market manipulation, and so is illegal. Also, spreading false rumors is classified as a fraudulent activity. Consequently, bear raids are illegal, but still occur when short sellers are careful to hide their activities from authorities.