The recent decision to keep interest rates steady is "good news" for the economies of the Asia-Pacific region, Roache said.
As world trade growth slows, Asian and other emerging markets must rely on domestic demand. He demands investment, he added.
"Investments usually mean a higher current account deficit for these countries, and investments are also sensitive to interest rates," Roache said.
"In both cases, lower US interest rates really help them Because the economies can have larger current account deficits, they can keep investment rates high," he said. "That will be very helpful for those economies that will suffer, probably because of the slowdown in export growth this year. "