Trading Alert, Regulatory Alert
MIAX Options
September 23, 2026 | 10:10 AM
MIAX Options - Change to the Upon Receipt Improvement Percentage (URIP) Setting
MIAX Options will decrease the Upon Receipt Improvement Percentage (URIP), described in MIAX Options Rule 518.03(b), from 70% to 51%, effective at the start of trading on Thursday, September 24, 2026.
The Initial Improvement Percentage (IIP), described in MIAX Options Rule 518.03(a), will remain at 70%.
The Re-evaluation Improvement Percentage (RIP), described in MIAX Options Rule 518.03(c), will remain at 80%.
For more information, please refer to the following Regulatory Circular:
For Regulatory questions, contact the Regulatory Department at Regulatory@MIAXGlobal.com or (609) 897-7309.