Refers to deliberate actions to interfere with the free and fair operation of a market, such as price rigging or spreading false information.
Market manipulation is prohibited by law.
The authorities launched an investigation on suspicion of market manipulation.
A synonym also meaning market manipulation, but 市場操作 is more common in modern legal and financial contexts.
open market operation
Compound of 市場 (market) and 操作 (operation, manipulation).