The Singapore dollar weakens against its U.S. counterpart in the Asian session amid rising Treasury yields that typically enhance the appeal of U.S.-dollar-denominated fixed-income assets. However, the Singapore dollar's losses may be limited ahead of Fed Chairman Warsh's appearance on a panel at a ECB forum today. "Market participants will be watching for any tweaks to his perceived hawkish comments," CBA's Joseph Capurso says in a research report. "Any deviation may be perceived as walking back his comments, weighing on the USD," the head of foreign exchange, international and geoeconomics adds. The U.S. dollar is 0.2% higher at 1.2958 Singapore dollars, LSEG data show. (ronnie.harui@wsj.com)