The dollar held its ground at the start of Asian trading on Tuesday after a holiday for some markets in the US, as geopolitical risks rose after renewed attacks on energy infrastructure in the Middle East and Ukraine.
The US dollar index, which measures the greenback's strength against a basket of six currencies, was at 102.56 in subdued Asian trading after closing up 0.3% on Monday. The currency is hovering around its highest levels since April last year.