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" Plans)
The 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.
Consolidated Audit Trail ("CAT")
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.
Limit Up-Limit Down Plan
This 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.
National Market System Plan for the Selection and Reservation of Securities Symbols
(The Intermarket Symbol Reservation Authority, or "ISRA" Plan) The 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 (SROs) that have joined the plan utilize this system to reserve one- to five-character root symbols, utilizing a web-based tool developed and maintained by the Options Clearing Corporation, the Plan Processor.