U.S. producer prices were unexpectedly unchanged in February, but the cooling trend is unlikely to be sustained as tariffs on imports are expected to raise prices of goods in the coming months. The unchanged reading in the producer price index for final demand last month followed an upwardly revised 0.

The Labor Department reported Thursday that its producer price index — which tracks inflation before it reaches consumers — was unchanged from January after rising 0.6% the month before.

Wholesale Producer Price Index inflation stayed flat in February while economists surveyed by Dow Jones had expected a 0.3% increase. The Bureau of Labor Statistics said Thursday annual PPI inflation was 3.