WASHINGTON (Reuters) - U.S. President Donald Trump said on Monday he was “not thrilled” with the Federal Reserve under his own appointee, Chairman Jerome Powell, for raising interest rates and said the U.S. central bank should do more to help him to boost the economy.

In the middle of international trade disputes, Trump in an interview with Reuters also accused China and Europe of manipulating their respective currencies.

American presidents have rarely criticized the Fed in recent decades because its independence has been seen as important for economic stability. Trump has departed from this past practice and said he would not shy from future criticism should the Fed keep lifting rates.

The president spooked investors in July when he criticized the U.S. central bank over tightening monetary policy. On Monday he said the Fed should be more accommodating on interest rates.

“I’m not thrilled with his raising of interest rates, no. I’m not thrilled,” Trump said, referring to Powell. Trump nominated Powell last year to replace former Fed Chair Janet Yellen.

U.S. stock prices dipped after Trump's comments to Reuters and the U.S. dollar .DXY edged down against a basket of currencies.

Trump, who criticized the Fed when he was a candidate, said other countries benefited from their central banks’ moves during tough trade talks, but the United States was not getting support from the Fed.

“We’re negotiating very powerfully and strongly with other nations. We’re going to win. But during this period of time I should be given some help by the Fed. The other countries are accommodated,” Trump said.

President Trump on U.S. interest rates: reut.rs/2nTC2Jl

The Fed has raised interest rates twice this year and is expected to do so again next month with consumer price inflation rising to 2.9 percent in July, its highest level in six years, and unemployment at 3.9 percent, the lowest level in about 20 years.

After leaving its policy interest rates at historic lows for about six years after the 2008 global financial crisis, the Fed began slowly raising rates again in late 2015.

Trump also said China was manipulating its yuan currency to make up for having to pay tariffs on imports imposed by Washington.

“I think China’s manipulating their currency, absolutely. And I think the euro is being manipulated also,” Trump said.

“What they’re doing is making up for the fact that they’re now paying ... hundreds of millions of dollars and in some cases billions of dollars into the United States Treasury. And so they’re being accommodated and I’m not. And I’ll still win.”

A Chinese central bank official said on Tuesday that China had taken note of the U.S. comments on the yuan, and said the two sides should communicate on the issue.

People’s Bank of China official Li Bo also told reporters that China’s yuan exchange rate was primarily market driven and that flexibility of the yuan exchange rate had increased. The currency has declined against the U.S. dollar for 10 straight weeks.

“We will not pursue competitive currency devaluation and will not use the currency as a weapon to deal with trade frictions,” said Li, reiterating previous statements from Beijing.

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Trump has frequently accused China of manipulating its currency, but his administration has so far declined to name China formally as a currency manipulator in a semi-annual report from the U.S. Treasury Department.

The U.S. dollar has strengthened this year by 5.35 percent against the yuan, reversing most of its large drop against the Chinese currency in 2017.

The euro is off by about 4.3 percent against the greenback this year, beset by concerns over the pace of economic growth in the EU trading bloc and over U.S.-European trade tensions.

Trump has made reducing U.S. trade deficits a priority and the combination of rising interest rates and a strengthening dollar pose risks for export growth.

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A Fed spokesman declined to comment on Trump’s remarks on Monday.

Powell last month said in an interview that the Fed has a “long tradition” of independence from political concerns, and that no one in the Trump administration had said anything to him that gave him concerns on that front.

“We’re going to do our business in a way that’s strictly nonpolitical, without taking political issues into consideration, and that carries out the mandate Congress has given us,” he said.

Financial market analysts doubt current Fed policy makers are likely to be cowed by Trump’s outbursts over their policy choices.

Still, it might affect candidates for openings on the bank’s seven-member board, said Guy LeBas, fixed income strategist at Janney Montgomery Scott in Philadelphia. Currently only three seats are filled.

“I doubt these comments move the needle for Powell and his colleagues, but it certainly sends a strong signal to those candidates interested in vying for one of the Fed Board’s many open seats: favor easy money policy or find another job,” LeBas said.

In addition to picking Powell as Fed chair, Trump has appointed one other board member, Randal Quarles, and has nominated three others to the panel, two of whom are expected to be confirmed soon by the Senate. That leaves at least one other current opening for him to fill.

Asked if he believed in the Fed’s independence, Trump said: “I believe in the Fed doing what’s good for the country.”

Powell took over as Fed chief earlier this year.

“Am I happy with my choice?” Trump said to Reuters about Powell. “I’ll let you know in seven years.”