US Treasury Secretary Timothy Geithner said Asia-Pacific nations need “market-oriented” currencies that are in line with their economic fundamentals to encourage new sources of growth.

Members of the Asia-Pacific Economic Cooperation group, which make up more than half of the world’s gross domestic product, must focus on strategies to boost private demand as policy-makers start unwinding stimulus measures, Geithner and the finance ministers of Indonesia and Singapore wrote in a Wall Street Journal column distributed by the US Treasury today.