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Module 17 · Intermediate · 20 min

Interest Rates & Rate Locks Explained

Realtors don't set rates, but they should understand how rates are priced, how locks work, and the cost of float-downs and extensions.

Learning Objectives
  • Explain how MBS markets move daily mortgage rates
  • Describe lock terms (15/30/45/60 days)
  • Compare float-down and rate-lock extensions
  • Coach buyers through rate volatility without panic

Where Rates Come From

Mortgage rates track the Mortgage-Backed Securities (MBS) market, not the Fed Funds rate directly. Strong economic data usually pushes rates up; weak data and flight-to-quality push them down.

Lock Mechanics

  • 15-day locks — best pricing, only for refis or last-minute purchases
  • 30-day — standard purchase lock
  • 45/60-day — new construction or longer escrow
  • Extensions — paid in basis points per day; the borrower covers it

Float-Down Options

Some lenders offer a one-time float-down if rates improve by a defined threshold (often 0.25%) before closing. It usually costs 0.25–0.50% in points up front.

Key Takeaways
  • Rates follow MBS, not the Fed directly.
  • Locks are date-bound; extensions cost basis points per day.
  • Float-downs trade a small upfront cost for downside protection.
End-of-Module Exam

Module 17 Exam — 5 questions

Pick the best answer for each question. Pass with 80% or higher to mark this module complete.

  1. 1.

    Mortgage rates most directly track:

  2. 2.

    A 30-day lock is best for:

  3. 3.

    If a lock expires before closing, the borrower usually:

  4. 4.

    A float-down option lets the borrower:

  5. 5.

    When rates spike mid-escrow on a floated file, the realtor should:

0 of 5 answered