Definition of pump-and-dump in English:

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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.
Example sentences
  • Instead of unwittingly getting inside information, Schwarz ran into the latest version of the classic "pump-and-dump" investment scam sweeping the nation.
  • Of course, recent announcements about new technology purchases seem to have gone nowhere, so it is increasingly sounding like a pump-and-dump type deal.
  • He allegedly cashed out his shares in this company at inflated prices - but not by dumping them on the public in the tried-and-true method of pump-and-dump schemes.
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