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US 30-Year Mortgage Rate Climbs to 6.71%, Hitting an Over One-Year High and Dampening the Housing Market

2026-09-04

  1. Core Overview: US mortgage rates are once again fluctuating higher. According to the latest DataTrack data released, as of September 3, 2026 (Q3 2026), the US 30-year fixed mortgage rate rose to 6.71%. This figure is not only higher than the previous week's 6.66% but also hits a 13-month high. Continuously rising borrowing costs are once again challenging the affordability limits of homebuyers.

  2. Key Details: Among various loan categories, the 15-year fixed mortgage rate also trended upward simultaneously, climbing from 5.98% last week to 6.04%. In addition, the US 10-year Treasury yield, which serves as a pricing benchmark for mortgage rates, recently encountered a global bond market sell-off, at one point surging past 4.8%. The high bond yields directly reflect market concerns over fiscal deficits and an inflation rebound.

  3. Deep Attribution: The current climb in mortgage rates is primarily driven by macroeconomic geopolitical and fiscal pressures. United Daily News cited Redfin economist Chen Zhao, noting that the US-Iran conflict triggered a surge in oil prices, which, combined with the total US national debt breaking $40 trillion, led to a sharp rise in long-term US Treasury yields. Freddie Mac Chief Economist Sam Khater stated that despite climbing borrowing costs, homebuying demand remains relatively stable, indicating that buyers are trying to adapt to the changing situation. However, high interest rates have exacerbated the "lock-in effect," dampening the willingness of existing homeowners to sell.

  4. Outlook & Risks: In the short term (1-2 months), mortgage rates are expected to remain fluctuating at a high level between 6.5% and 7%. Federal Reserve Governor Christopher Waller recently hinted that current mortgage and auto loan rates are on the high side, and financial conditions are not overly accommodative; the trajectory of the September meeting will become a short-term catalyst for the housing market. In the medium term (3-6 months), if the high interest rate environment continues to erode purchasing power, pending home sales volumes may continue to decline. Investors need to closely monitor energy price fluctuations and geopolitical developments, as these will be the biggest tail risks dictating the direction of the bond and housing markets.

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