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A significant gauge of the level of options market data is messages per second (MPS), which is the number of messages (i.e., options trade and quote data) reported to OPRA by the options exchanges during any given second of a trading day. Data volume has increased dramatically since the early 1990s, as illustrated in the following table. [2] [3 ...
In this role, SIAC provides the computers and other systems required to run the exchanges. It also owns communication lines and hardware to provide real-time quotes and transaction information to all market participants from the Consolidated Tape/Ticker System (CTS), Consolidated Quotation System (CQS), and Options Price Reporting Authority ...
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]
The rule changes were subsequently challenged by Nasdaq, the New York Stock Exchange, and other exchange groups in the courts before finally being upheld by the D.C. Circuit Court. [8] In September 2023, following the DC circuit's ruling, the SEC issued an order directing the exchange groups to submit a new NMS plan, referred to as the CT Plan. [9]
Exchange Native Order Flow FIX Order Flow Market Data Taiwan Stock Exchange: TMP (TWSE Message Protocol) 4.4: FIX/FAST: Taipei Exchange: TMP (TWSE Message Protocol) 4.4: Tokyo Stock Exchange: Arrowhead: 4.2: FLEX Indonesia Stock Exchange: OUCH: FIX 5.0: ITCH: Singapore Exchange Securities Trading (SGXST) OMEX-Singapore Exchange Derivatives ...
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These were then automatically interpreted by a hard wired digital computer updating a drum memory with the last sale prices and at the same time computing and updating highs and lows and total volume for each stock. As these items were updated a data packet would be generated for transmission by AT&T Dataphone at 1000 bits/second to identical ...
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