noun
churning
Finance term for excessive trading by a broker to generate commissions, often at the client's expense.
証券会社が回転売買を行い、顧客に多額の手数料を負担させた。
The brokerage engaged in churning, imposing heavy commission costs on the client.
Compound of 回転 (rotation, turnover) and 売買 (buying and selling), literally 'rotational trading', referring to frequent buying and selling.