The euro on Wednesday jumped back above parity with the dollar, the US currency sliding against its main rivals on concerns over the world's biggest economy.

The euro bounced back above one dollar for the first time since mid-September, helped also by expectations of a big interest rate hike from the European Central Bank on Thursday.

There were large gains against the dollar also for the British pound and yen, helping them to recover some ground after recent sharp losses.

The dollar retreated following "a string of negative (US) economic data released since the beginning of the week", noted ActivTrades senior analyst Ricardo Evangelista.

Poorly received data, including slower house price growth and weaker consumer confidence, showed that big rate hikes from the Federal Reserve are "starting to open some cracks in the American economy," he said.

"The Federal Reserve has been hiking rates aggressively in an attempt to bring inflation under control, and the country's economy is starting to suffer as a result," Evangelista added.

Sterling on Wednesday jumped more than one percent against the dollar, winning a boost also from markets welcoming the appointment of Rishi Sunak as prime minister.

The move was seen as offering stability to the UK economy after weeks of upheaval fuelled by predecessor Liz Truss's tax-cutting budget.

The dollar also slumped against the yen following recent 32-year highs, as the Bank of Japan holds off from raising interest rates. (AFP)