The central bank had already increased interest rates by 0.75 percentage points in June and July.

The Fed has raised interest rates five times this year.

At the beginning of the year it was still in a range of 0.0 to 0.25 percent.

The background to the significant tightening is the very high inflation.

In August, the inflation rate in the US was 8.3 percent.

The Fed is targeting a rate of just 2 percent.

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