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Financing · 12% of Exam

Adjustable-Rate Mortgage (ARM)

Definition

An adjustable-rate mortgage (ARM) has an interest rate that changes periodically based on market conditions, typically after an initial fixed-rate period. The rate adjustment is tied to a financial index plus a margin.

Example

A borrower gets a 5/1 ARM at 5% initial rate with a 2% periodic cap and 6% lifetime cap, margin of 2.5%. After 5 years, if the index is 4%, the new rate would be 4% + 2.5% = 6.5%. But the periodic cap limits the increase to 7% (5% + 2%). The rate can never exceed 11% (5% + 6% lifetime cap).

Exam Tip

Know the components: Index + Margin = Fully Indexed Rate. Understand the three types of caps: periodic (per adjustment), lifetime (total increase), and payment cap. A common exam question: "What is the maximum rate?" Answer: Initial rate + lifetime cap. The margin stays the same throughout the loan.

Related Financing Terms

Frequently Asked Questions

Test Your Financing Knowledge

Practice with exam-style questions to make sure you can apply Adjustable-Rate Mortgage (ARM) and other financing concepts.