Rate Caps, Locks, and Indexes

Rate Caps, Locks, and Indexes explains the benchmarks, contractual spreads, adjustment limits, and pre-closing commitments that determine or preserve mortgage pricing.

Use these pages when reproducing an ARM reset, reviewing an adjustment notice, comparing quoted and locked rates, or identifying which contract term limits a rate change. It sits inside Mortgage Rates, ARMs, and Rate Locks.

Use the rate-sheet branch for quoted and locked origination pricing. Use the cap-and-index branch for adjustable-rate calculations and loan-lock mechanics.

What This Branch Covers

What to Check

• Note rate, APR, index, margin, reset period, cap, floor, teaser rate, lock agreement, and rate sheet.
• Fixed, adjustable, hybrid, buydown, discount, offset, or renegotiated-rate structure.
• Points, fees, lock expiration, float-down terms, conversion options, and payment adjustment schedule.
• Effect on payment, affordability, refinancing, prepayment, default risk, and investor yield.
• Whether quoted rates include points, fees, program limits, and borrower assumptions.

Common Mistakes

• Comparing rates without APR, points, fees, lock terms, and loan assumptions.
• Ignoring ARM caps, margins, indexes, reset dates, and payment shock.
• Treating a rate quote as a locked rate.
• Assuming a buydown permanently lowers all loan economics.

Mortgage-rate content is educational and does not provide rate forecasts, borrowing advice, refinancing advice, or investment recommendations.

In this section

Choose a subsection first. Deeper term pages live inside each subsection, which keeps large topic hubs readable.