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  2. Unlisted Trading Privileges - Wikipedia

    en.wikipedia.org/wiki/Unlisted_Trading_Privileges

    The securities listed on Nasdaq can be quoted and traded from any US exchange. Trades and quotes on these securities are distributed on two separate feeds, the UTP Quotation Data Feed (UQDF) and the UTP Trade Data Feed (UTDF). UQDF provides traders a direct view of an NBBO. These feeds are considered level 1 or the top-of-book.

  3. National market system plan - Wikipedia

    en.wikipedia.org/wiki/National_market_system_plan

    The UTP SIP handles Tape C securities and provides two feeds, the UQDF for quotes and the NBBO and the UTDF for trades. Tape C contains stocks listed on NASDAQ , and is overseen by the UTP Plsn. [ 3 ]

  4. Securities information processor - Wikipedia

    en.wikipedia.org/wiki/Securities_Information...

    The Securities Industry Automation Corporation (SIAC), which is a subsidiary of NYSE, operates and maintains the CTA's and OPRA's infrastructure. [12] The participant exchanges and market centers that send trade and quote data to the UTP Plan's SIP operate under a service agreement with Nasdaq. [13]

  5. Consolidated Tape Association - Wikipedia

    en.wikipedia.org/wiki/Consolidated_Tape_Association

    The Consolidated Tape Association (CTA) oversees the Securities Information Processor that disseminates real-time trade and quote information (market data) in New York Stock Exchange (NYSE) and American Stock Exchange (AMEX) listed securities (stocks and bonds). [1]

  6. Consolidated Tape System - Wikipedia

    en.wikipedia.org/wiki/Consolidated_Tape_System

    The Consolidated Tape System (CTS) is the United States electronic service, introduced in April 1976, that provides last sale and trade data for issues admitted to dealings on the American Stock Exchange, New York Stock Exchange, and U.S. regional stock exchanges.

  7. Market data - Wikipedia

    en.wikipedia.org/wiki/Market_data

    CTA operates one of the Securities Information Processors in the United States. UTP Plan operates the Securities Information Processors for securities listed on Nasdaq and over-the-counter securities.

  8. Consolidated Quotation System - Wikipedia

    en.wikipedia.org/wiki/Consolidated_Quotation_System

    The Consolidated Quotation System (CQS) is the electronic service that provides quotation information for stock traded on the American Stock Exchange, New York Stock Exchange, and other regional stock exchanges in the United States and also includes issues traded by FINRA member firms in the third market.

  9. Stock market data systems - Wikipedia

    en.wikipedia.org/wiki/Stock_market_data_systems

    [3] In the early 20th century Western Union acquired rights to an improved ticker which could deal with the increasing volume of stocks sold per day. [3] At the time of the stock market crash in October, 1929, trading volumes were so high that the tickers fell behind, contributing to the panic. In the 1930s the New York Quotation Stock Ticker ...