SIAC

SIAC

See: Security Industry Automated Corporation

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SIAC

See Securities Industry Automation Corporation.

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Security Industry Automated Corporation

On the New York Stock Exchange, AMEX, and affiliated exchanges, an organization that provides computer services. Consequently, SIAC runs DOT, a computerized order-entry system that sends smaller buy or sell orders to the appropriate specialist on the floor of a stock exchange, bypassing the floor broker. It also provides the Consolidated Quotation System and the Options Price Reporting Authority. The NYSE owns two-thirds of the SIAC, while AMEX owns the remainder.