August CPI at 3.4% Lifts Mortgage Rates, Raises Fed Hike Odds

Higher consumer prices continued to squeeze household budgets in August, with the Consumer Price Index rising 3.4 percent from a year earlier. The increase coincided with climbing fuel costs and mortgage rates that reached multi-month highs, leaving many families facing steeper monthly expenses even as the labor market stayed resilient.

The data, released September 12, 2026, showed prices advancing faster than hourly wages for the fifth straight month. A separate University of Michigan survey released the same day recorded a sharp drop in consumer sentiment, reflecting fresh concerns that inflation would persist. Mortgage rates tracked the move higher: the national average 30-year fixed rate stood at 6.91 percent according to Zillow lender marketplace figures, up eight basis points in two days, while the 15-year fixed rate climbed 14 basis points to 6.37 percent.

President Trump, speaking at his party’s midterm convention in Dallas, described Republican economic results as “tremendous economic success” and pledged a $5,000 payment to citizens if Republicans kept congressional majorities. He also said gasoline prices would fall below $2 a gallon after the election. White House National Economic Council director Kevin Hassett called surging diesel prices a “big, big issue” tied to geopolitical uncertainty, including the conflict with Iran that briefly lifted Brent crude to $110 a barrel.

Mortgage Bankers Association chief economist Michael Fratantoni noted the 30-year rate had already hit a 15-month high near 6.8 percent the prior week and could reach or exceed 7 percent. Ten-year Treasury yields topped 4.9 percent, the highest level since 2023. The Federal Reserve’s policy rate sat in a 3.25-to-3.75 percent range; the fresh inflation reading increased market expectations for a rate increase at the next meeting.

Economist Oren Klachkin of Nationwide observed that strong headline growth and an artificial-intelligence investment boom had not offset the visible pressure of higher prices and borrowing costs on purchasing power. Treasury Secretary Scott Bessent’s attempt to ease yields by repurchasing older bonds produced little market response. Peter G. Peterson Foundation executive vice president Brett Loper warned that any new $5,000 payment program could add roughly $1.2 trillion in costs and further upward pressure on inflation and interest rates.