Pump and dump (P&D) is a form of securities fraud that involves artificially inflating the price of an owned stock through false and misleading positive statements (pump), in order to sell the cheaply purchased stock at a higher price (dump). Once the operators of the scheme "dump" (sell) their overvalued shares, the price falls and investors lose their money. This is most common with small-cap cryptocurrencies and very small corporations/companies, i.e. "microcaps".
"Night wind hawkers" sold stock on the streets during the South Sea Bubble. (The Great Picture of Folly, 1720)
Anatomy of a scalping scheme
Stocks consist of all the shares by which ownership of a corporation or company is divided. A single share of the stock means fractional ownership of the corporation in proportion to the total number of shares. This typically entitles the shareholder (stockholder) to that fraction of the company's earnings, proceeds from liquidation of assets, or voting power, often dividing these up in proportion to the amount of money each stockholder has invested. Not all stock is necessarily equal, as certain classes of stock may be issued, for example, without voting rights, with enhanced voting rights, or with a certain priority to receive profits or liquidation proceeds before or after other classes of shareholders.
The 12.5% share of the Great Copper Mountain, dated June 16, 1288
Stock certificate for ten shares of the Baltimore and Ohio Railroad Company
A stockbroker using multiple screens to stay up to date on trading