The dollar retreated today after rallying the previous day when investors rushed to the safe-haven currency on worries about China's Covid flare-ups, while fears of fresh contagion from the collapse of crypto exchange FTX pressured bitcoin.

The euro was up 0.3% at $1.0265 after an 0.8% loss yesterday, sterling rose 0.46% to $1.187, partially reversing its 0.6% fall.

Meanwhile, the dollar was at 141.86 yen, down 0.6% after a 1.2% gain.

Flows to the dollar yesterday came as Beijing warned that it was facing its most severe test of the Covid-19 pandemic, with a surge in Covid cases sparking fresh restriction measures. Deaths from the virus were also recorded in the capital for the first time since May.

Restrictions in Beijing and elsewhere tightened further today, though currency traders seemed to think the previous day's moves were sufficient.

Lee Hardman, senior currency analyst at MUFG said in a note, that more cautious remarks from US Federal Reserve officials were a factor in the dollar losing some momentum today.

Cleveland Fed President Loretta Mester said the Fed can downshift to smaller interest rate hikes from next month, and San Francisco Fed President Mary Daly said the real-world impact of interest rate increases is likely greater than its short-term rate target implies.

Meanwhile, data from the European Central Bank showed the euro zone's current account deficit narrowed in September.

"While we flagged the big deterioration of the current account earlier this year as something that was creating a challenge for the euro, we may already be seeing signs that the worst is now over," said Dominic Bunning, head of European FX research at HSBC.

But he cautioned against reading too much into one data point.

The fresh bout of risk aversion related to China weighed particularly on the antipodean currencies - often used as liquid proxies for the Chinese yuan - with the Aussie sliding nearly 1% yesterday. It recouped some losses today, rising 0.5% to $0.6639.

The trend held true further from China as well though, with the dollar falling 0.43% against the Swiss franc to 0.9552, reversing a similar gain the day before.

In cryptocurrencies, bitcoin fell to a new two-year low of $15,479 yesterday, another victim of the rush to the dollar, and also amid jitters about the health of crypto broker Genesis.

Genesis said it has no plans to file for bankruptcy imminently, though Bloomberg News reported, citing sources, that Genesis was struggling to raise fresh cash for its lending unit, and warning investors it may need to file for bankruptcy if it does not find funding.

The lending unit suspended redemptions last week, citing fallout from the collapse of FTX, which filed for bankruptcy on November 11.