Will Inflation’s Upside Surprise Spoil The Fed’s Rate-Cutting Party?

 | Sep 13, 2019 08:22AM ET

Just when it looked like inflation’s threat was fading, yesterday’s August report on consumer prices dispensed a not-so-fast alert. The core reading of the Consumer Price Index (CPI), which excludes food and energy, rose 0.3% last month and accelerated to a 2.4% annual pace – the highest in 11 years. One data point isn’t a trend, of course. But yesterday’s release is conspicuous at a time when the U.S. economy is struggling with slow growth and expectations that interest rates are headed lower, perhaps turning negative at some point.

Core CPI has a history of dispensing relatively reliable forecasts of inflation’s future path and so this data isn’t easily ignored. If this measure of pricing pressure continues to tick up in the months ahead, the trend will complicate and perhaps even derail the Federal Reserve’s plans to loosen policy.