🔵 IEX Competitive Intel
The Texas Stock Exchange, a new entrant still preparing to launch, is cleaning up its rulebook with a batch of mostly technical order-handling changes to conform its rules to planned system functionality and align them with existing practices at IEX, Nasdaq, Cboe and MIAX. Substantive tweaks include letting non-displayed limit and pegged orders rest rather than cancel, removing the market-order price collar, and making Post-Only orders strictly liquidity-adding (never removing). Filed as immediately effective and the SEC waived the 30-day delay, so the changes take effect now, though the SEC retains a 60-day window to suspend them.
IEX RELEVANT TXSE is a new equity exchange competitor whose order-handling rules explicitly model IEX's Post-Only, non-displayed price sliding, and market-order treatment, signaling how a rival venue is designing itself to interoperate with IEX's conventions.
NYSE Arca is amending its trading halt rules to require mandatory regulatory halts for nine categories of corporate actions (symbol/CUSIP changes, large dividends, stock splits, De-SPACs, spin-offs, security-type changes, mergers, plus a catch-all) in securities it primarily lists, with trading resuming via an 8:00 a.m. ET halt auction. This is driven by the upcoming launch of 23/5 near-continuous trading, which shrinks the overnight processing window to just one hour and creates a need to pause trading so exchanges and market participants can process corporate actions without causing pricing errors or erroneous executions. The rule took effect immediately as a non-controversial filing under the 19b-4(f)(6) process, meaning it is operative now (though the SEC retains a 60-day window to suspend it); the practical effect is that affected securities will be halted overnight and reopen at 8:00 a.m. ET once 23/5 Trading begins, with other primary listing markets planning substantially identical rules for consistency.
IEX RELEVANT As competitors like NYSE Arca and Nasdaq build out the operational framework for 23/5 near-continuous trading, IEX must monitor whether extended-hours equity trading becomes an industry standard that pressures IEX to develop comparable overnight capabilities and corporate-action halt procedures.
🟠 Other Notable Filings
Cboe wants to launch a novel product—binary options tied to companies' reported earnings metrics (like Apple's iPhone sales or Tesla's revenue), which pay a fixed $1 if the reported KPI hits a strike level. The SEC is merely publishing the proposal for public comment, an early procedural step that doesn't approve or reject it; given this is a genuinely new instrument type requiring companion clearing (via Cboe Clear US) and disclosure-document approvals, it faces a lengthy and uncertain review. Nothing changes for market participants now, and the product cannot list until multiple related SEC approvals are secured.