A house stock is a
stock
In finance, stock (also capital stock) consists of all the shares by which ownership of a corporation or company is divided.Longman Business English Dictionary: "stock - ''especially AmE'' one of the shares into which ownership of a compan ...
that the management of a
brokerage firm
A broker is a person or firm who arranges transactions between a buyer and a seller for a commission when the deal is executed. A broker who also acts as a seller or as a buyer becomes a principal party to the deal. Neither role should be con ...
or
boiler room has instructed all its brokers to promote. The brokerage firm or its owners might be receiving an undisclosed profit from the sale of the house stock.
Stock market
{{Econ-stub