1. Specialty mortgages offer lower initial monthly payments but come with greater risks than traditional fixed-rate or adjustable-rate mortgages.
2. The payments on specialty mortgages may increase substantially, by as much as 50%, once an introductory period ends which could lead to "payment shock" if income does not increase enough.
3. Some specialty mortgages like interest-only or negative amortization loans may cause the total amount owed to increase over time rather than decrease.