ข่าว/FED GOV WALLER Q&A/ECM: US CAN SPREAD OUT ITS DEBT REPAYMENT FOR DECADES BUT CAN'T KEEP ADDING SO MUCH, RAISING DEBT/GDP RATIO OR MKTS…ข่าวด่วนFED GOV WALLER Q&A/ECM: US CAN SPREAD OUT ITS DEBT REPAYMENT FOR DECADES BUT CAN'T KEEP ADDING SO MUCH, RAISING DEBT/GDP RATIO OR MKTS TO RAISE RATESFFED30DSPXDJIEURUSD