Bond ETFs tumbled on Wednesday after Federal Reserve Chair Jerome Powell signaled that another rate cut at the December FOMC meeting isn’t guaranteed, contradicting market expectations for an almost certain move.As widely anticipated, the Fed lowered its benchmark federal funds rate by 25 basis points to a target range of 3.75% to 4%. But Powell struck a more cautious tone about the path ahead.“In the committee’s discussions at this meeting, there were strongly differing views about how to proceed in Decem ...