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SIAC

   Also found in: Acronyms, Wikipedia 0.01 sec.
SIAC
See: Security Industry Automated Corporation
SIAC
See Securities Industry Automation Corporation.
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.


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