B3 Expands DI Contract Oscillation Limits; Futures Rates Plunge to New Lows

B3 widened daily oscillation limits for DI futures contracts, triggering a sharp selloff in rates as January 2028, 2029, and 2031 contracts fell by roughly 100 basis points intraday. The move suggests heightened market stress or a policy shift, with rates hitting record lows. The expansion may reflect B3's response to extreme volatility, but the underlying driver—whether central bank action or market positioning—remains unclear.