U.S. Options

T-Rex 2X Long MSTR Daily Target ETF (MSTU) has announced a reverse stock split effective for Monday, August 24, 2026.

MSTU2 will be available for trading on the MIAX Options, MIAX Pearl Options and MIAX Sapphire Options Exchanges on Monday, August 24, 2026. MSTU2 will not be available for trading on the MIAX Emerald Options Exchange.

No options on the underlying MSTU will be available for trading on Monday, August 24, 2026.

All GTC orders resting on the MIAX order books in MSTU will be canceled at the close of business on Friday, August 21, 2026.

MSTU will resume trading on the MIAX Options, MIAX Pearl Options, MIAX Emerald Options and MIAX Sapphire Options Exchanges on Tuesday, August 25, 2026.

Please Note:

• MSTU2 options will trade on Cloud 8 on the MIAX Options and Cloud 5 on the MIAX Pearl Options Exchanges and on Cloud 4 on the MIAX Sapphire Options Exchange.

Market Makers can use the Member Firm Portal (MFP) to manage their option class assignments. 

• MSTU should be used for class assignments in MSTU2 via MFP

All LMM and RMM Option Class Assignments must be entered prior to 6:00 PM ET on the business day immediately preceding the effective date.  All changes made after 6:00 PM ET on a given day will be effective two trading days later.

MIAX Options and MIAX Emerald Primary Lead Market Maker (PLMM) assignments and un-assignments will not be supported via the MFP. 
 
Additional details about the T-Rex 2X Long MSTR Daily Target ETF (MSTU) reverse stock split are provided in the attached OCC Memo.

Please contact MIAX Listings with any questions at Listings@miaxglobal.com or (609) 897-7308.