An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock
()
or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Notice of Filing of a Proposed Rule Change to Modify Rule 11.21 to Adopt a Retail Price Improvement Program and Modify Rule 11.6(e)(2) and Rule 11.10(a)(4)(C) – (D) in Order to Describe the Behavior of Orders Containing a Non-Displayed Instruction