SEC Approves Cboe BZX Exchange Rule Amendment Adding Price Validation Test for ETP IPO Auctions
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The SEC has granted accelerated approval to Cboe BZX Exchange's proposed rule change (SR-CboeBZX-2025-149, effective March 31, 2026) that reforms how IPO auctions operate for Exchange-Traded Products (ETPs). The core change introduces a mandatory 'price validation test' for all ETP IPO Auctions, allowing the Quote-Only Period—which begins at 8:00 a.m. ET—to be automatically extended in 5-second increments if the live Indicative Price deviates from an Expected Price approved by the Lead Market Maker (LMM) beyond selected price bands. Under the new framework, the LMM approves an Indicative Price to establish an 'Expected Price' and may select upper and lower price bands (ranging from $0 to $0.50 in $0.01 increments, with a default of $0.10 on each side) prior to 9:45 a.m. ET. Starting at 9:30 a.m. ET, the price validation test runs automatically every 5 seconds. If the ETP fails the test repeatedly, the Quote-Only Period extends but must terminate no later than 9:45 a.m. ET under this specific provision, after which the auction proceeds regardless. The rule change also formally separates the Quote-Only Period extension rules for BZX-listed corporate securities (new Rule 11.23(d)(2)(B)) from those for ETP IPO Securities (new Rule 11.23(d)(2)(C)), acknowledging key structural differences such as ETPs having no underwriter. The definition of 'Indicative Price' under Rule 11.23(a)(10) is also amended to clarify that for IPO Auctions, it refers only to the Auction Book (not the Continuous Book, which does not yet exist for a new listing). The SEC found the proposal consistent with Section 6(b)(5) of the Securities Exchange Act of 1934, noting it promotes fair price discovery, removes impediments to a free and open market, and aligns with similar functionality already in use at Nasdaq for ETP IPO auctions.
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Key Changes
- New mandatory price validation test for all ETP IPO Auctions: starting at 9:30 a.m. ET, the Indicative Price must remain within LMM-selected price bands (max $0.50 above/below Expected Price) or the Quote-Only Period auto-extends in 5-second increments
- Quote-Only Period for ETP IPO Auctions must terminate no later than 9:45 a.m. ET under the price validation test extension provision (Rule 11.23(d)(2)(C)(vi))
- Default price bands set at $0.10 above and below the Expected Price if the LMM does not select custom bands; available bands range from $0 to $0.50 in $0.01 increments
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Obligations
What this law requires
Cboe BZX Exchange must implement a mandatory price validation test for all ETP IPO Auctions that automatically extends the Quote-Only Period in 5-second increments if the live Indicative Price deviates from the Expected Price beyond selected price bands, effective March 31, 2026.
The Lead Market Maker (LMM) must approve an Indicative Price to establish an Expected Price and may select upper and lower price bands (ranging from $0 to $0.50 in $0.01 increments, with a default of $0.10 on each side) prior to 9:45 a.m. ET for ETP IPO Auctions.
The price validation test must run automatically every 5 seconds starting at 9:30 a.m. ET during ETP IPO Auctions.
The Quote-Only Period extension for ETP IPO Auctions must terminate no later than 9:45 a.m. ET, after which the auction must proceed regardless of price validation test results.
Cboe BZX Exchange must formally separate the Quote-Only Period extension rules for BZX-listed corporate securities (Rule 11.23(d)(2)(B)) from those for ETP IPO Securities (Rule 11.23(d)(2)(C)) to account for structural differences such as ETPs having no underwriter.