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Rates & Finance6 min read

Understanding Mortgage Rates: What Moves Them and How to Get the Best Deal

L
Lumina TeamNovember 28, 2025

What Determines Mortgage Rates?

Mortgage rates are influenced by a combination of macroeconomic factors and your personal financial profile. Understanding both can help you time your purchase and optimize your rate.

Macroeconomic Factors

  • Federal Reserve Policy: While the Fed doesn't directly set mortgage rates, its decisions on the federal funds rate influence the broader interest rate environment. When the Fed raises rates, mortgage rates tend to follow.
  • Inflation: Higher inflation generally leads to higher mortgage rates, as lenders need to maintain their real return on investment.
  • Bond Market: Mortgage rates closely track the yield on 10-year U.S. Treasury bonds. When bond yields rise, mortgage rates typically rise too.
  • Economic Growth: A strong economy with low unemployment tends to push rates higher, while economic slowdowns can bring rates down.

Personal Factors That Affect Your Rate

  • Credit Score: The single biggest factor in your individual rate. A score of 760+ typically qualifies for the best rates. Each 20-point drop can add 0.125-0.25% to your rate.
  • Down Payment: A larger down payment (20%+) usually means a lower rate and no private mortgage insurance (PMI).
  • Loan Type: Conventional, FHA, VA, and jumbo loans all have different rate structures.
  • Loan Term: 15-year mortgages typically have lower rates than 30-year mortgages.
  • Property Type: Single-family homes get the best rates. Condos, multi-family, and investment properties may have slightly higher rates.

How to Get the Best Rate

The most effective strategies include: improving your credit score before applying, saving for a larger down payment, comparing offers from multiple lenders (Lumina does this automatically across 50+ lenders), considering a shorter loan term if affordable, and locking your rate at the right time.

When to Lock Your Rate

A rate lock guarantees your interest rate for a set period (typically 30-60 days). If rates rise during that period, you're protected. If rates drop significantly, some lenders offer a one-time "float down" option. Your loan officer can advise on the best timing based on current market conditions.

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