US mortgage rates rise for first time in three weeks, adding pressure to housing affordability

The average 30-year fixed mortgage rate climbed to 6.66%, according to Freddie Mac’s latest Primary Mortgage Market Survey published on August 27. It’s the first increase in three weeks, and while the move from 6.65% might look like a rounding error, it signals that the brief downward drift in borrowing costs has stalled.

The 15-year fixed-rate mortgage saw a slightly larger jump, rising to 5.98% from 5.95% the prior week.

A narrow band with nowhere to go but sideways

Throughout August, mortgage rates have been stuck in a tight range within the mid-6% territory. That range has hovered near the higher end of recent trends, sitting uncomfortably close to September’s earlier peak of 6.69%.

The Mortgage Bankers Association observed a corresponding dip in mortgage application volumes during the same period. Refinance demand, which is particularly sensitive to rate fluctuations, took the biggest hit.

At current rates, monthly payments on a median-priced home are hundreds of dollars higher than they would be at the sub-5% rates that millions of existing homeowners locked in during 2020 and 2021. That gap creates a powerful incentive to stay put, which constrains inventory and keeps the market in a frustrating holding pattern.

The lock-in effect is still running the show

The so-called lock-in effect continues to define the US housing market. Homeowners sitting on mortgages in the 3% range have little financial reason to sell and take on a new loan at nearly double the rate. The result is a market where supply remains tight despite demand cooling.

Freddie Mac’s chief economist struck a cautiously optimistic tone despite the rate increase, pointing to the resilience of the broader economy. Steady consumer spending and rising household incomes have contributed to what the agency described as a more balanced market, with more homes becoming available and price growth decelerating in several areas.

What this means for the housing market and beyond

The persistence of rates in the mid-6% range has implications well beyond monthly mortgage payments. Sluggish home sales mean fewer commissions for real estate agents, less business for title companies and home inspectors, and reduced demand for the constellation of services that surround every transaction.

For the mortgage-backed securities market, sustained elevated rates present a double-edged dynamic. Existing MBS portfolios benefit from borrowers staying locked into their current loans, which reduces prepayment risk. But new issuance remains subdued because origination volume is depressed, limiting the supply of fresh securities.

Freddie Mac’s survey, which has been conducted weekly since 1971, serves as one of the longest-running benchmarks for the housing market. Its latest reading suggests the window many were hoping for hasn’t opened yet.

For existing homeowners weighing whether to list their properties, trading a 3% mortgage for a 6.66% one requires either a compelling life reason to move or enough equity to make a substantially larger down payment on the next home.

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