This document provides an overview of mortgages and security interests. It defines key terms like secured vs unsecured loans and security interests. It describes different types of mortgages including conventional, adjustable rate, interest-only, balloon payment, and reverse mortgages. It explains the roles of Fannie Mae, Ginnie Mae, and Freddie Mac in the mortgage market and how securitization contributed to the financial crisis through risky loans like liar loans and NINJA loans. It also covers creating security interests in personal property and requirements for attachment.