Also found in: Dictionary, Thesaurus, Medical, Acronyms, Idioms, Encyclopedia, Wikipedia.
Related to SOES: SOEC
Small Order Execution System
A computerized order-entry system on NASDAQ that bypasses brokers and automatically executes orders at the best available price. The SOES is available for buy and sell orders for 200, 500, and 1,000 shares. NASDAQ market makers are required to use SOES where appropriate. It was established in 1987 following the stock market crash of that year.