Manipulation
Definition: Dealing in a security to create a false appearance of active trading, in order to bring in more traders. Illegal.

Manipulation
Definition: Any planned operation, transaction, or practice that causes or maintains an artificial price. Specific types include corners and squeezes as well as unusually large purchases or sales of a commodity or security in a short period of time in order to distort prices, and putting out false information in order to distort prices.