The dollar has firmed up amid a risk-wary sentiment in global markets, which has seen world equity markets settle lower from record highs. At the same time, market conditions have been thinned by the lunar new year holidays in China and some other Asian nations. Some tough talk aimed at China from U.S. President Biden was blamed by some on the souring in sentiment, alongside a higher than expected print in weekly U.S. unemployment claims data. The DXY dollar index, after tumbling in three of the last four days, found a footing and lifted to a three-day high at 90.53.