pump-and-dump

pump-and-dump ▶adjective informal denoting the fraudulent practice of encouraging investors to buy shares in a company in order to inflate the price artificially, and then selling one's own shares while the price is high.

pump-and-dump

pump-and-dump ▶adjective informal denoting the fraudulent practice of encouraging investors to buy shares in a company in order to inflate the price artificially, and then selling one's own shares while the price is high.