Even as US inflation has hit the highest rate in over a decade, the central bank is sticking to its guns, and will continue to provide stimulus until the economy has fully recovered, Federal Reserve Chair Jerome Powell said Wednesday.

Powell acknowledged that inflation will remain "elevated" in coming months but will decline once supply bottlenecks and other temporary issues are resolved.

And the world's largest economy still has "a long way to go" to return to full employment following the Covid-19 pandemic, Powell said in his semi-annual testimony to Congress.

The Fed "will ensure that monetary policy will continue to deliver powerful support to the economy until the recovery is complete," he said.

Inflation has surged in recent months, with the annual consumer price index (CPI) hitting 5.4 percent in June, the highest since August 2008.

And wholesale prices also are soaring, with the producer price index jumping to 7.3 percent in the 12 months ended in June, the highest since the Labor Department began measuring in November 2010, according to data released Wednesday.

But Powell and other Fed officials have stuck to their argument that the high rates have been driven mostly by temporary issues related to the struggles to reopen the economy following the pandemic shutdowns and is not a reason to pull back on stimulus efforts.

Many private economists agree, saying inflation peaked in June, but Powell is likely to face tough questions from members of the House Financial Services Committee in the hearing that begins at 1600 GMT. He is due to appear again Thursday before the Senate Banking Committee.

Moderating inflation

"Inflation has increased notably and will likely remain elevated in coming months before moderating," Powell said in his prepared testimony.

He cited the impact of supply issues including a global semiconductor shortage that has hindered auto production, and said those factors "should partially reverse as the effects of the bottlenecks unwind."

The Fed cut the benchmark lending rate to zero right at the start of the pandemic and implemented a massive bond-buying program to provide liquidity to the economy during the crisis.

Central bankers have pledged to maintain the stimulus until inflation holds above the two percent goal and the labor market has recovered.

Inflation for years lagged below that target level, so the Fed has shifted its focus to "aim to achieve inflation moderately above 2 percent for some time so that inflation averages 2 percent over time," Powell said.

And while job gains are expected to continue, Powell said "reaching the standard of 'substantial further progress' is still a ways off."

He noted that low wage workers, African Americans and Hispanics were hardest hit by the pandemic job losses and "still have the most ground left to regain."

Fed officials have begun to discuss when they will start to taper the $120 billion a month in asset purchases, and Powell again pledged to give advance notice before making any changes.