The document discusses various types of residential mortgages and borrower decisions. It begins by explaining the primary mortgage market where loans are originated and the secondary market where loans can be sold. It then describes common mortgage types like 30-year fixed rate mortgages, conventional loans, FHA loans, and other products such as home equity loans, reverse mortgages, and subprime loans. The document concludes by discussing measures for comparing loan costs such as annual percentage rate and factors considered for refinancing a mortgage.