The Securities Industry Automation Corporation (SIAC) is a subsidiary of the NYSE Euronext. Its purpose is to provide technical services for the exchanges themselves, members and other financial institutions. 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

Consolidated Tape System

The Consolidated Tape System is the 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...

 (CTS), Consolidated Quotation System

Consolidated Quotation System

The Consolidated Quotation System 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...

 (CQS), and Options Price Reporting Authority

Options Price Reporting Authority

The Options Price Reporting Authority provides, through market data vendors, last sale information and current options quotations from a committee of participant exchanges designated as the Options Price Reporting Authority....

 (OPRA).

Origins

SIAC was created on July 17, 1972 as a wholly owned subsidiary of the NYSE and American Stock Exchange

American Stock Exchange

NYSE Amex Equities, formerly known as the American Stock Exchange is an American stock exchange situated in New York. AMEX was a mutual organization, owned by its members. Until 1953, it was known as the New York Curb Exchange. On January 17, 2008, NYSE Euronext announced it would acquire the...

. The NYSE owned two thirds of SIAC, while the AMEX owned one third. On November 1, 2006, NYSE Euronext purchased AMEX’s stake for $40 million.

Sector, Inc.

Sector, Inc. was integrated with the business of Transacttools and SFTI to become NYSE Technologies

NYSE Technologies

NYSE Technologies is the commercial technology division of NYSE Euronext.NYSE Technologies provides comprehensive transaction, data and infrastructure services and managed solutions for buy-side, sell-side and exchange communities that require next-generation performance and expertise for mission...

. NYSE Technologies

NYSE Technologies

NYSE Technologies is the commercial technology division of NYSE Euronext.NYSE Technologies provides comprehensive transaction, data and infrastructure services and managed solutions for buy-side, sell-side and exchange communities that require next-generation performance and expertise for mission...

 provides financial markets and market participants with an open, high performance, low latency and neutral platform for direct market access and global trading connectivity that improves liquidity and reduces risk. NYSE Technologies

NYSE Technologies

NYSE Technologies is the commercial technology division of NYSE Euronext.NYSE Technologies provides comprehensive transaction, data and infrastructure services and managed solutions for buy-side, sell-side and exchange communities that require next-generation performance and expertise for mission...

 is a subsidiary of NYSE Euronext.

SFTI

NYSE Technologies

NYSE Technologies

NYSE Technologies is the commercial technology division of NYSE Euronext.NYSE Technologies provides comprehensive transaction, data and infrastructure services and managed solutions for buy-side, sell-side and exchange communities that require next-generation performance and expertise for mission...

' Secure Financial Transaction Infrastructure (SFTI) - pronounced "safety" - is a communications network dedicated to the financial industry. The highly reliable, resilient and low latency network offers connectivity to NYSE as well as other exchanges, market centers and content service providers and also connects to over 800 market participants including all of the National Market System markets in the United States.