The dollar moved in a narrow range on Tuesday as investors evaluated developments in the Middle East and awaited a set of speeches by US central bank officials this week, most notably the speech of Federal Reserve Chairman Jerome Powell, seeking indicators about monetary policy expectations.
The yen stabilized near the important 150 level against the dollar, keeping investors on alert for any indications of interference from the Japanese authorities.
In its most recent transactions, the yen recorded 149.60 against the dollar after falling to 150.17 on October 3, which is the weakest level this year before it caught its breath a little.
The dollar index, which measures the US currency against six major currencies, rose 0.056 percent to 106.32 after falling 0.36 percent on Monday.
The British pound fell 0.14 percent in its latest trading and was trading for $1.2199, after rising 0.6 percent on Monday. The pound fell 3.7 percent this month.
The euro fell 0.14 percent to $1.0545.
The Australian dollar increased 0.17 percent to $0.6353, while the New Zealand dollar fell 0.47 percent to $0.5901.