NMS Plans
The Long-Term Stock Exchange, along with other U.S. exchanges and FINRA, is a party to several national market system (NMS) plans, which govern various aspects of equity market structure.
Consolidated Data Plans ("SIP" NMS Plans)
Securities Information Processor (SIP) Plans govern the collection, processing, and distribution of quotation and transaction information for exchange-listed securities. Data is derived from various market centers, including securities exchanges, FINRA, and broker-dealers. Under the SIP Plans, all U.S. exchanges and associations that quote and trade exchange-listed securities must provide their data to a SIP for data consolidation and dissemination.
Limit Up-Limit Down Plan ("LULD" NMS Plan)
The LULD Plan governs the establishment, operation, and administration of a market-wide limit up-limit down mechanism that is intended to address extraordinary market volatility in NMS stocks, as defined in Rule 600 (b)(47) of Regulation NMS under the Exchange Act. The Plan sets forth market-wide limit up-limit down requirements designed to prevent trades in individual NMS Stocks from occurring outside of the specified price bands and also governs quotations in NMS stocks.
Consolidated Audit Trail ("CAT" NMS Plan)
This Plan implements Exchange Act Rule 613, which calls for the creation of a single comprehensive database that will enable regulators to more efficiently and thoroughly track all trading activity in the U.S. equity and options markets. The CAT Plan, among other things, details the methods by which self-regulatory organizations and broker-dealers will record and report information, including the identity of the customer, resulting in a range of data elements that together provide the complete lifecycle of all orders and transactions in the U.S. equity and options markets.
NMS Plan for the Selection and Reservation of Securities Symbols
("ISRA" NMS Plan)
The Intermarket Symbol Reservation Authority (ISRA) Plan governs the establishment, operation, and administration of a uniform system for the selection and reservation of securities symbols, the Symbol Reservation System. Self-regulatory organizations that have joined the Plan use this system to reserve one- to five-character root symbols, using a web-based tool developed and maintained by the Options Clearing Corporation, the ISRA Plan Processor.
Order Execution Quality Disclosure Plan ("Rule 605" NMS Plan)
This Plan establishes procedures under Rule 605 of Regulation NMS (previously Rule 11Ac1-5 under the Exchange Act). Rule 605 generally requires a market center that trades Regulation NMS stocks to make available to the public monthly electronic execution reports that include uniform statistical measures of execution quality.