The Senior Credit Officer Opinion Survey on Dealer Financing Terms (SCOOS) is a quarterly survey providing information about the availability and terms of credit in securities financing and over-the counter (OTC) derivatives markets. The SCOOS is modeled after the long-established Senior Loan Officer Opinion Survey on Bank Lending Practices, which provides qualitative information about changes in supply and demand for loans to households and businesses at commercial banks. The SCOOS collects qualitative information on credit terms and conditions in securities financing and OTC derivatives markets, which are important conduits for leverage in the financial system. The survey panel for the SCOOS began by including 20 dealers and over time has been expanded. These firms account for almost all of the dealer activity in dollar-denominated securities financing and OTC derivatives markets. The survey is directed to senior credit officers responsible for maintaining a consolidated perspective on the management of credit risks.