US President Donald Trump on Thursday criticised Federal Reserve policy even though most economists believe the highest inflation in seven years and lowest unemployment in 40 years justify recent interest rate rises and a strong US dollar.

Mr Trump said he was concerned about the potential impact on the US economy and American corporate competitiveness from rising rates and a stronger dollar.

“I’m not thrilled,” he said in an interview on CNBC television. “Because we go up and every time you go up they want to raise rates again ... I am not happy about it. But at the same time I’m letting them do what they feel is best.”

“I don’t like all of this work that we’re putting into the economy and then I see rates going up,” he said.

Trump said he was concerned that the “Chinese currency was dropping like a rock” and the strong US dollar “puts us at a disadvantage.”

US Treasury debt yields ended the day lower and the US dollar slipped from the session highs to end little changed after Mr Trump’s comments.

After more than six years of record low interest rates that helped the US economy recover from the 2008 financial crisis, the Fed began to slowly raise rates again in December 2015 and has raised them five times since Trump took office in January 2017.

The US central bank last raised borrowing costs in June, and in an address to Congress this week Fed Chair Jerome Powell repeated his view that rates would keep rising slowly now that the unemployment rate was at the lowest since the 1960s and consumer price inflation was 2.9 per cent annually in June.

US central bankers project two more interest rate increases this year and another three in 2019.

Steady US economic growth of around 2.0 per cent in the first quarter of this year and rising interest rates, at a time when the European Central bank and the Bank of Japan are keeping their rates low, helped the US dollar climb to its highest level in a year in July.

This was not the first time Trump departed from a long-standing practice by U.S. presidents of respecting the Federal Reserve’s independence by refraining from commenting on interest rates or the value of the US dollar, a custom he dismissed on Thursday.

“Now I’m just saying the same thing that I would have said as a private citizen,” Trump said. “So somebody would say, ‘Oh, maybe you shouldn’t say that as president.’ I couldn’t care less what they say because my views haven’t changed.”

Later, the White House said in a statement that Trump respects the Fed’s independence and was not interfering with its policy decisions.

Mr Trump nominated current Fed Chair Powell, who had served as a governor on the board of the US central bank, to serve at its helm after Janet Yellen’s retirement in February.

In his remarks to CNBC, Trump called Powell “a very good man.”

Mr Trump has further reshaped the Fed’s leadership by appointing its vice chair for regulation and nominating two more Fed governors, both mainstream economists.

Mr Trump regularly claims that his policies, especially tax cuts enacted by Congress last December, have created jobs and economic growth.

Trump in Helsinki: Putin meeting and protests Show all 16 1 /16 Trump in Helsinki: Putin meeting and protests Trump in Helsinki: Putin meeting and protests President Trump meets with Russian President Vladimir Putin in Helsinki Reuters Trump in Helsinki: Putin meeting and protests An advert from Finnish newspaper Helsingin Sanomat is on display in Helsinki Reuters Trump in Helsinki: Putin meeting and protests President Trump in a meeting with Finnish President Sauli Niinisto AFP/Getty Trump in Helsinki: Putin meeting and protests President Trump meets with Finnish President Sauli Niinisto in Helsinki EPA Trump in Helsinki: Putin meeting and protests President Trump talks with Finnish President Sauli Niinisto in Mantyniemi, the official residence of the Finnish President EPA Trump in Helsinki: Putin meeting and protests US, Finnish and Russian flags fly in front of the Presidential Palace in Helsinki EPA Trump in Helsinki: Putin meeting and protests A protester wears a mask featuring a portrait of Russian President Vladimir Putin during the so-called "Helsinki against Trump and Putin" demonstration on July 16, 2018, in the Finnish capital Helsinki. The US and Russian leaders opened an historic summit in Helsinki on Monday, with Donald Trump promising an "extraordinary relationship" and Vladimir Putin saying it was high time to thrash out disputes around the world. / AFP PHOTO / Jonathan NACKSTRANDJONATHAN NACKSTRAND/AFP/Getty Images JONATHAN NACKSTRAND AFP/Getty Trump in Helsinki: Putin meeting and protests Vladimir Putin gifts a football to President Trump at the press conference that followed their meeting AP Trump in Helsinki: Putin meeting and protests Trump supporters hold banners during a demonstration in Helsinki AFP/Getty Trump in Helsinki: Putin meeting and protests People protest for women's reproductive rights in Helsinki's Senate Square Reuters Trump in Helsinki: Putin meeting and protests A crowd watches the motorcade transporting President Trump through Helsinki AFP/Getty Trump in Helsinki: Putin meeting and protests Russian President Putin drives through Helsinki on his way to meet with President Trump EPA Trump in Helsinki: Putin meeting and protests A man in the audience of the joint press conference holds up a sign sign that reads "NUCLEAR WEAPON BAN TREATY". REUTERS Trump in Helsinki: Putin meeting and protests A man is removed from the joint press conference in Helsinki. Security removed the man after he pulled out a sign that read "NUCLEAR WEAPON BAN TREATY". REUTERS Trump in Helsinki: Putin meeting and protests President Trump and Russia's President Putin sit for a working lunch in Finland's Presidential Palace AFP/Getty Trump in Helsinki: Putin meeting and protests President Trump meets with Russian President Vladimir Putin in Helsinki Reuters

But most economists credit the Fed with engineering the economic recovery that began in 2010, and is now the second longest US economic expansion on record, by keeping interest rates at historically low levels and buying back US Treasury debt to inject liquidity into the market.

“His statement doesn’t make a lot of sense to me,” said Mike Lorizio, head of Treasuries trading at Manulife Asset Management. “The economy has been on its strongest footing in some time.”

Most economists believe the Fed’s current policy of raising interest rates is sound monetary policy given US consumer price inflation is at an annual rate of 2.9 per cent and the unemployment rate was at 4.0 per cent in June.

“The thing fueling the dollar strength is the strength of the US economy,” said Michael O’Rourke, chief market strategist at Jones Trading in Greenwich, Connecticut.

“We’re looking at 4.0 per cent GDP growth for Q2, record low unemployment, the lowest initial jobless claims number in 50 years, and inflation above the official target,” he said.

Trump: I would 'hold Putin responsible' for election meddling

“All those things point to the Fed continuing to raise interest rates and the economy being fairly strong, relative to all the global issues going on: trade wars, the fear in Europe of Brexit without a clear path. I’m surprised the dollar is not higher.”

Economists say the biggest risk to America’s economic growth are Trump’s own policies, especially his imposition of import tariffs on China and Europe as well as allies like Mexico and Canada.

American companies may find themselves less able to compete globally as import tariffs contribute to rising input costs, forcing them to raise prices or lower their profit margins.

However, many analysts doubt Trump’s comments will have much impact on Federal Reserve policy or the markets.

“I don’t think this is indicative of any pending action from the administration that would limit Fed power,” said Thomas Simons, money market economist at investment bank Jefferies in New York.

“A good sign of proof there is who he has been naming to the open board spots at the Fed,” he said. “They are all people with strong independent views on monetary policy and the economy and economic theory ... they are legitimate, verified, bona fide economists and business leaders who are independent.”