Wholesale prices unexpectedly fell in March, setting up a favorable inflation backdrop as President Donald Trump began intensifying tariffs against U.S. trading partners, the Bureau of Labor Statistics reported Friday.

The producer price index, considered a leading indicator for pipeline inflation pressures, declined a seasonally adjusted 0.4% for the month, after rising 0.1% in February. Economists surveyed by Dow Jones had been looking for an increase of 0.2%.

Excluding food and energy, so-called core PPI also declined, down 0.1% against the estimate for a 0.3% increase. The index less food, energy and trade services increased 0.1%.

More than 70% of the slide in final demand prices came from a 0.9% tumble in goods prices, a key measure as policymakers look for inflation drivers. Services prices also pulled back, falling 0.2%.