Soaring petrol prices helped drive up US consumer prices last month at the fastest rate in six months, the government said yesterday, but core prices remained tame, easing inflation fears in financial markets.

A separate report showed US consumer sentiment tumbling to a 28-year low this month, with some lessening of expectations on inflation one year out and a steady reading on long-term inflation expectations, which held at a 13-year high.

The Commerce Department said the Consumer Price Index rose a steep 0.6 per cent last month, a touch more than Wall Street had expected, after a modest 0.2pc gain in April.

However, so-called core prices, which exclude volatile food and energy cost, edged up just 0.2pc. Surging petrol prices and soft labour market conditions have depressed consumer spirits.

The Reuters/University of Michigan sentiment index for this month dropped to 56.7 from 59.8 last month. Wall Street economists had expected a decline to only 59.5.

“Today’s inflation numbers do not put any additional pressure on the Fed to hike interest rates,” said Mark Vitner, senior economist at Wachovia in Charlotte, North Carolina. “The Fed is not nearly as behind the curve as some people currently believe.”

The reassuring data followed a series of inflation warnings from central bankers around the globe, and capped off a week in which expectations of higher US rates had climbed sharply.

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