(Bloomberg) -- Traders rushing into exchange-traded funds that benefit from the Federal Reserve keeping interest rates higher for longer are being warned that the best days to capture soaring yields are over.Most Read from BloombergIndians Have Five Days to Deposit $3 Billion in Soon-to-Be-Withdrawn BanknotesBonds Sink, S&P 500 Snaps Four-Day Losing Streak: Markets WrapIndia-Canada Clash Should Be a Wake-Up CallChinese Gold Buying Is Driving a Paradigm Shift in BullionCostco Offers Members $29 O