to do something purely for the financial gain; selling your soul
English Idioms Dictionary
sell information or support The Bible tells us that Judas sold out to the bad guys.
Bloomberg Financial Glossary
Liquidation of a margin account after a customer has failed to bring an account to a required level by producing additional equity after a margin call. The selling of securities by a broker when a customer fails to pay for them. The complete sale of all securities in a new issue.