The exchange’s immediately effective filing lifts the annual per-recipient threshold from $100 and imports FINRA-style rules for valuation, aggregation, supervision and limited exclusions.
An SEC notice describes how IEX proposes to prevent an overnight reopening after a Level 3 market-wide circuit-breaker halt, responding to the planned expansion of 23-hour equity sessions elsewhere.
New bookable D-Peg orders would rest instead of first seeking midpoint execution when their selected instability or imbalance indicator is on. IEX will announce the implementation date separately.