Many penny stocks, particularly those that trade for fractions of a cent, are thinly traded. They can become the target of stock promoters and manipulators. These manipulators first purchase large quantities of stock, then drive up the share price through false and misleading positive statements; they then sell their shares at a large profit. This is referred to as a "pump and dump" scheme. The pump and dump is a form of microcap stock fraud. In more sophisticated versions of the fraud, individuals or organizations buy millions of shares, then use newsletter websites, chat rooms, stock message boards, press releases, or e-mail blasts to drive up interest in the stock. Very often, the perpetrator will claim to have inside information about impending news to persuade the unwitting investor to quickly buy the shares. When buying pressure pushes the share price up, the rise in price entices more people to believe the hype and to buy shares as well. Eventually the manipulators doing the "pumping" end up "dumping" when they sell their holdings.